diff --git a/std/assembly/array.ts b/std/assembly/array.ts
index 59abb3c930..5e99da31e2 100644
--- a/std/assembly/array.ts
+++ b/std/assembly/array.ts
@@ -1,10 +1,10 @@
 import {
   MAX_BLENGTH,
   HEADER_SIZE,
-  allocateUnsafe,
-  reallocateUnsafe,
+  reallocateZeroedUnsafe,
   LOAD,
-  STORE
+  STORE,
+  allocateZeroedUnsafe
 } from "./internal/arraybuffer";
 
 import {
@@ -44,7 +44,7 @@ export class Array<T> {
     const MAX_LENGTH = MAX_BLENGTH >>> alignof<T>();
     if (<u32>length > <u32>MAX_LENGTH) throw new RangeError("Invalid array length");
     var byteLength = length << alignof<T>();
-    var buffer = allocateUnsafe(byteLength);
+    var buffer = allocateZeroedUnsafe(byteLength);
     this.buffer_ = buffer;
     this.length_ = length;
     memory.fill(
@@ -65,7 +65,7 @@ export class Array<T> {
     if (<u32>length > <u32>capacity) {
       const MAX_LENGTH = MAX_BLENGTH >>> alignof<T>();
       if (<u32>length > <u32>MAX_LENGTH) throw new RangeError("Invalid array length");
-      buffer = reallocateUnsafe(buffer, length << alignof<T>());
+      buffer = reallocateZeroedUnsafe(buffer, length << alignof<T>());
       this.buffer_ = buffer;
     }
     this.length_ = length;
@@ -105,7 +105,7 @@ export class Array<T> {
     if (<u32>index >= <u32>capacity) {
       const MAX_LENGTH = MAX_BLENGTH >>> alignof<T>();
       if (<u32>index >= <u32>MAX_LENGTH) throw new Error("Invalid array length");
-      buffer = reallocateUnsafe(buffer, (index + 1) << alignof<T>());
+      buffer = reallocateZeroedUnsafe(buffer, (index + 1) << alignof<T>());
       this.buffer_ = buffer;
       this.length_ = index + 1;
     }
@@ -180,7 +180,7 @@ export class Array<T> {
     if (<u32>length >= <u32>capacity) {
       const MAX_LENGTH = MAX_BLENGTH >>> alignof<T>();
       if (<u32>length >= <u32>MAX_LENGTH) throw new Error("Invalid array length");
-      buffer = reallocateUnsafe(buffer, newLength << alignof<T>());
+      buffer = reallocateZeroedUnsafe(buffer, newLength << alignof<T>());
       this.buffer_ = buffer;
     }
     this.length_ = newLength;
@@ -325,7 +325,7 @@ export class Array<T> {
     if (<u32>length >= <u32>capacity) {
       const MAX_LENGTH = MAX_BLENGTH >>> alignof<T>();
       if (<u32>length >= <u32>MAX_LENGTH) throw new Error("Invalid array length");
-      buffer = reallocateUnsafe(buffer, newLength << alignof<T>());
+      buffer = reallocateZeroedUnsafe(buffer, newLength << alignof<T>());
       capacity = buffer.byteLength >>> alignof<T>();
       this.buffer_ = buffer;
     }
diff --git a/std/assembly/arraybuffer.ts b/std/assembly/arraybuffer.ts
index bef14bdbed..fc4bc7848f 100644
--- a/std/assembly/arraybuffer.ts
+++ b/std/assembly/arraybuffer.ts
@@ -1,7 +1,7 @@
 import {
   HEADER_SIZE,
   MAX_BLENGTH,
-  allocateUnsafe
+  allocateZeroedUnsafe
 } from "./internal/arraybuffer";
 
 import {
@@ -45,7 +45,7 @@ export class ArrayBuffer {
 
   constructor(length: i32, unsafe: bool = false) {
     if (<u32>length > <u32>MAX_BLENGTH) throw new RangeError("Invalid array buffer length");
-    var buffer = allocateUnsafe(length);
+    var buffer = allocateZeroedUnsafe(length);
     if (!unsafe) memory.fill(changetype<usize>(buffer) + HEADER_SIZE, 0, <usize>length);
     return buffer;
   }
@@ -57,7 +57,7 @@ export class ArrayBuffer {
     if (end < 0) end = max(len + end, 0);
     else end = min(end, len);
     var newLen = max(end - begin, 0);
-    var buffer = allocateUnsafe(newLen);
+    var buffer = allocateZeroedUnsafe(newLen);
     memory.copy(changetype<usize>(buffer) + HEADER_SIZE, changetype<usize>(this) + HEADER_SIZE + begin, newLen);
     return buffer;
   }
diff --git a/std/assembly/internal/arraybuffer.ts b/std/assembly/internal/arraybuffer.ts
index faf8facd41..658c09728f 100644
--- a/std/assembly/internal/arraybuffer.ts
+++ b/std/assembly/internal/arraybuffer.ts
@@ -19,49 +19,73 @@ function computeSize(byteLength: i32): usize {
 }
 
 // Low-level utility
-
 function __gc(ref: usize): void {}
 
-export function allocateUnsafe(byteLength: i32): ArrayBuffer {
+@inline function _resize(buffer: ArrayBuffer, newByteLength: i32): ArrayBuffer {
+  store<i32>(changetype<usize>(buffer), newByteLength, offsetof<ArrayBuffer>("byteLength"));
+  return buffer;
+}
+
+@inline function _allocateUnsafe(byteLength: i32): ArrayBuffer {
   assert(<u32>byteLength <= <u32>MAX_BLENGTH);
-  var buffer: usize;
-  if (isManaged<ArrayBuffer>()) {
-    buffer = __gc_allocate(computeSize(byteLength), __gc); // tslint:disable-line
-  } else {
-    buffer = memory.allocate(computeSize(byteLength));
-  }
-  store<i32>(buffer, byteLength, offsetof<ArrayBuffer>("byteLength"));
+  var buffer: usize = isManaged<ArrayBuffer>()
+    ? __gc_allocate(computeSize(byteLength), __gc) // tslint:disable-line
+    : memory.allocate(computeSize(byteLength));
+  return _resize(changetype<ArrayBuffer>(buffer), byteLength);
+}
+
+export function allocateZeroedUnsafe(byteLength: i32): ArrayBuffer {
+  var buffer = _allocateUnsafe(byteLength);
+
+  // zero out the buffer
+  memory.fill(buffer.data, 0, byteLength);
   return changetype<ArrayBuffer>(buffer);
 }
 
+export function allocateUnsafe(byteLength: i32): ArrayBuffer {
+  return _allocateUnsafe(byteLength);
+}
+
+/**
+ * This inline grow method allocates a new ArrayBuffer, then frees the old one.
+ */
+@inline function _growUnsafe(buffer: ArrayBuffer, oldByteLength: i32, newByteLength: i32): ArrayBuffer {
+  assert(newByteLength > buffer.byteLength && newByteLength <= MAX_BLENGTH);
+  var newBuffer = _allocateUnsafe(newByteLength);
+  memory.copy(newBuffer.data, buffer.data, oldByteLength);
+  if (!isManaged<ArrayBuffer>()) {
+    memory.free(changetype<usize>(buffer));
+  }
+  return newBuffer;
+}
+
+/**
+ * This function perform
+ */
+@inline function _realocateUnsafe(buffer: ArrayBuffer, oldByteLength: i32, newByteLength: i32): ArrayBuffer {
+  // non-negative values should be unreachable()
+  assert(newByteLength >= 0);
+  // fastest path: buffer should be the same length
+  if (newByteLength === oldByteLength) return buffer;
+  // fast path: byteLength is less than or equal to currently allocated size (this is safe)
+  if (newByteLength <= <i32>(computeSize(oldByteLength) - HEADER_SIZE)) {
+    return _resize(buffer, newByteLength);
+  }
+
+  // slow path: buffer needs new allocation (_growUnsafe frees the old buffer)
+  return _growUnsafe(buffer, oldByteLength, newByteLength);
+}
+
 export function reallocateUnsafe(buffer: ArrayBuffer, newByteLength: i32): ArrayBuffer {
+  return _realocateUnsafe(buffer, buffer.byteLength, newByteLength);
+}
+
+export function reallocateZeroedUnsafe(buffer: ArrayBuffer, newByteLength: i32): ArrayBuffer {
   var oldByteLength = buffer.byteLength;
-  if (newByteLength > oldByteLength) {
-    assert(newByteLength <= MAX_BLENGTH);
-    if (newByteLength <= <i32>(computeSize(oldByteLength) - HEADER_SIZE)) { // fast path: zero out additional space
-      store<i32>(changetype<usize>(buffer), newByteLength, offsetof<ArrayBuffer>("byteLength"));
-    } else { // slow path: copy to new buffer
-      let newBuffer = allocateUnsafe(newByteLength);
-      memory.copy(
-        changetype<usize>(newBuffer) + HEADER_SIZE,
-        changetype<usize>(buffer) + HEADER_SIZE,
-        <usize>oldByteLength
-      );
-      if (!isManaged<ArrayBuffer>()) {
-        memory.free(changetype<usize>(buffer));
-      }
-      buffer = newBuffer;
-    }
-    memory.fill(
-      changetype<usize>(buffer) + HEADER_SIZE + <usize>oldByteLength,
-      0,
-      <usize>(newByteLength - oldByteLength)
-    );
-  } else if (newByteLength < oldByteLength) { // fast path: override size
-    // TBD: worth to copy and release if size is significantly less than before?
-    assert(newByteLength >= 0);
-    store<i32>(changetype<usize>(buffer), newByteLength, offsetof<ArrayBuffer>("byteLength"));
-  }
+  buffer = _realocateUnsafe(buffer, oldByteLength, newByteLength);
+
+  // zero out the allocated values that weren't copied
+  memory.fill(buffer.data + oldByteLength, 0, newByteLength - oldByteLength);
   return buffer;
 }
 
diff --git a/std/assembly/internal/typedarray.ts b/std/assembly/internal/typedarray.ts
index 089fa3a32c..f98fa319a9 100644
--- a/std/assembly/internal/typedarray.ts
+++ b/std/assembly/internal/typedarray.ts
@@ -1,9 +1,9 @@
 import {
   HEADER_SIZE as AB_HEADER_SIZE,
   MAX_BLENGTH as AB_MAX_BLENGTH,
-  allocateUnsafe,
   LOAD,
-  STORE
+  STORE,
+  allocateZeroedUnsafe
 } from "./arraybuffer";
 
 import {
@@ -22,7 +22,7 @@ export abstract class TypedArray<T> {
     const MAX_LENGTH = <u32>AB_MAX_BLENGTH / sizeof<T>();
     if (<u32>length > MAX_LENGTH) throw new RangeError("Invalid typed array length");
     var byteLength = length << alignof<T>();
-    var buffer = allocateUnsafe(byteLength);
+    var buffer = allocateZeroedUnsafe(byteLength);
     memory.fill(changetype<usize>(buffer) + AB_HEADER_SIZE, 0, <usize>byteLength);
     this.buffer = buffer;
     this.byteOffset = 0;
diff --git a/tests/compiler/std/array-literal.optimized.wat b/tests/compiler/std/array-literal.optimized.wat
index fa45c3a8e0..c5c52a3b9b 100644
--- a/tests/compiler/std/array-literal.optimized.wat
+++ b/tests/compiler/std/array-literal.optimized.wat
@@ -91,34 +91,7 @@
   global.set $~lib/allocator/arena/offset
   local.get $1
  )
- (func $~lib/internal/arraybuffer/allocateUnsafe (; 2 ;) (type $ii) (param $0 i32) (result i32)
-  (local $1 i32)
-  local.get $0
-  i32.const 1073741816
-  i32.gt_u
-  if
-   i32.const 0
-   i32.const 168
-   i32.const 26
-   i32.const 2
-   call $~lib/env/abort
-   unreachable
-  end
-  i32.const 1
-  i32.const 32
-  local.get $0
-  i32.const 7
-  i32.add
-  i32.clz
-  i32.sub
-  i32.shl
-  call $~lib/allocator/arena/__memory_allocate
-  local.tee $1
-  local.get $0
-  i32.store
-  local.get $1
- )
- (func $~lib/internal/memory/memset (; 3 ;) (type $FUNCSIG$vii) (param $0 i32) (param $1 i32)
+ (func $~lib/internal/memory/memset (; 2 ;) (type $FUNCSIG$vii) (param $0 i32) (param $1 i32)
   (local $2 i32)
   local.get $1
   i32.eqz
@@ -337,11 +310,43 @@
    end
   end
  )
+ (func $~lib/internal/arraybuffer/allocateZeroedUnsafe (; 3 ;) (type $ii) (param $0 i32) (result i32)
+  (local $1 i32)
+  local.get $0
+  i32.const 1073741816
+  i32.gt_u
+  if
+   i32.const 0
+   i32.const 168
+   i32.const 30
+   i32.const 2
+   call $~lib/env/abort
+   unreachable
+  end
+  i32.const 1
+  i32.const 32
+  local.get $0
+  i32.const 7
+  i32.add
+  i32.clz
+  i32.sub
+  i32.shl
+  call $~lib/allocator/arena/__memory_allocate
+  local.tee $1
+  local.get $0
+  i32.store
+  local.get $1
+  i32.const 8
+  i32.add
+  local.get $0
+  call $~lib/internal/memory/memset
+  local.get $1
+ )
  (func $~lib/array/Array<i8>#constructor (; 4 ;) (type $FUNCSIG$i) (result i32)
   (local $0 i32)
   (local $1 i32)
   i32.const 3
-  call $~lib/internal/arraybuffer/allocateUnsafe
+  call $~lib/internal/arraybuffer/allocateZeroedUnsafe
   local.set $1
   i32.const 8
   call $~lib/allocator/arena/__memory_allocate
@@ -368,7 +373,7 @@
   (local $0 i32)
   (local $1 i32)
   i32.const 12
-  call $~lib/internal/arraybuffer/allocateUnsafe
+  call $~lib/internal/arraybuffer/allocateZeroedUnsafe
   local.set $1
   i32.const 8
   call $~lib/allocator/arena/__memory_allocate
diff --git a/tests/compiler/std/array-literal.untouched.wat b/tests/compiler/std/array-literal.untouched.wat
index ea58225d14..74a085ef22 100644
--- a/tests/compiler/std/array-literal.untouched.wat
+++ b/tests/compiler/std/array-literal.untouched.wat
@@ -194,41 +194,7 @@
   global.set $~lib/allocator/arena/offset
   local.get $1
  )
- (func $~lib/internal/arraybuffer/allocateUnsafe (; 5 ;) (type $ii) (param $0 i32) (result i32)
-  (local $1 i32)
-  (local $2 i32)
-  local.get $0
-  global.get $~lib/internal/arraybuffer/MAX_BLENGTH
-  i32.le_u
-  i32.eqz
-  if
-   i32.const 0
-   i32.const 168
-   i32.const 26
-   i32.const 2
-   call $~lib/env/abort
-   unreachable
-  end
-  block $~lib/memory/memory.allocate|inlined.0 (result i32)
-   local.get $0
-   call $~lib/internal/arraybuffer/computeSize
-   local.set $2
-   local.get $2
-   call $~lib/allocator/arena/__memory_allocate
-   br $~lib/memory/memory.allocate|inlined.0
-  end
-  local.set $1
-  local.get $1
-  local.get $0
-  i32.store
-  local.get $1
- )
- (func $~lib/memory/memory.allocate (; 6 ;) (type $ii) (param $0 i32) (result i32)
-  local.get $0
-  call $~lib/allocator/arena/__memory_allocate
-  return
- )
- (func $~lib/internal/memory/memset (; 7 ;) (type $iii_) (param $0 i32) (param $1 i32) (param $2 i32)
+ (func $~lib/internal/memory/memset (; 5 ;) (type $iii_) (param $0 i32) (param $1 i32) (param $2 i32)
   (local $3 i32)
   (local $4 i32)
   (local $5 i64)
@@ -482,6 +448,73 @@
    end
   end
  )
+ (func $~lib/internal/arraybuffer/allocateZeroedUnsafe (; 6 ;) (type $ii) (param $0 i32) (result i32)
+  (local $1 i32)
+  (local $2 i32)
+  (local $3 i32)
+  (local $4 i32)
+  (local $5 i32)
+  block $~lib/internal/arraybuffer/_allocateUnsafe|inlined.0 (result i32)
+   local.get $0
+   local.set $1
+   local.get $1
+   global.get $~lib/internal/arraybuffer/MAX_BLENGTH
+   i32.le_u
+   i32.eqz
+   if
+    i32.const 0
+    i32.const 168
+    i32.const 30
+    i32.const 2
+    call $~lib/env/abort
+    unreachable
+   end
+   block $~lib/memory/memory.allocate|inlined.0 (result i32)
+    local.get $1
+    call $~lib/internal/arraybuffer/computeSize
+    local.set $2
+    local.get $2
+    call $~lib/allocator/arena/__memory_allocate
+    br $~lib/memory/memory.allocate|inlined.0
+   end
+   local.set $2
+   block $~lib/internal/arraybuffer/_resize|inlined.0 (result i32)
+    local.get $2
+    local.set $3
+    local.get $1
+    local.set $4
+    local.get $3
+    local.get $4
+    i32.store
+    local.get $3
+   end
+  end
+  local.set $5
+  block $memory.fill|inlined.0
+   block $~lib/arraybuffer/ArrayBuffer#get:data|inlined.0 (result i32)
+    local.get $5
+    local.set $2
+    local.get $2
+    global.get $~lib/internal/arraybuffer/HEADER_SIZE
+    i32.add
+   end
+   local.set $2
+   i32.const 0
+   local.set $1
+   local.get $0
+   local.set $4
+   local.get $2
+   local.get $1
+   local.get $4
+   call $~lib/internal/memory/memset
+  end
+  local.get $5
+ )
+ (func $~lib/memory/memory.allocate (; 7 ;) (type $ii) (param $0 i32) (result i32)
+  local.get $0
+  call $~lib/allocator/arena/__memory_allocate
+  return
+ )
  (func $~lib/array/Array<i8>#constructor (; 8 ;) (type $iii) (param $0 i32) (param $1 i32) (result i32)
   (local $2 i32)
   (local $3 i32)
@@ -504,7 +537,7 @@
   i32.shl
   local.set $2
   local.get $2
-  call $~lib/internal/arraybuffer/allocateUnsafe
+  call $~lib/internal/arraybuffer/allocateZeroedUnsafe
   local.set $3
   block (result i32)
    local.get $0
@@ -527,7 +560,7 @@
   local.get $0
   local.get $1
   i32.store offset=4
-  block $memory.fill|inlined.0
+  block $memory.fill|inlined.1
    local.get $3
    global.get $~lib/internal/arraybuffer/HEADER_SIZE
    i32.add
@@ -589,7 +622,7 @@
   i32.shl
   local.set $2
   local.get $2
-  call $~lib/internal/arraybuffer/allocateUnsafe
+  call $~lib/internal/arraybuffer/allocateZeroedUnsafe
   local.set $3
   block (result i32)
    local.get $0
@@ -612,7 +645,7 @@
   local.get $0
   local.get $1
   i32.store offset=4
-  block $memory.fill|inlined.1
+  block $memory.fill|inlined.2
    local.get $3
    global.get $~lib/internal/arraybuffer/HEADER_SIZE
    i32.add
@@ -684,7 +717,7 @@
   i32.shl
   local.set $2
   local.get $2
-  call $~lib/internal/arraybuffer/allocateUnsafe
+  call $~lib/internal/arraybuffer/allocateZeroedUnsafe
   local.set $3
   block (result i32)
    local.get $0
@@ -707,7 +740,7 @@
   local.get $0
   local.get $1
   i32.store offset=4
-  block $memory.fill|inlined.2
+  block $memory.fill|inlined.3
    local.get $3
    global.get $~lib/internal/arraybuffer/HEADER_SIZE
    i32.add
@@ -779,7 +812,7 @@
   i32.shl
   local.set $2
   local.get $2
-  call $~lib/internal/arraybuffer/allocateUnsafe
+  call $~lib/internal/arraybuffer/allocateZeroedUnsafe
   local.set $3
   block (result i32)
    local.get $0
@@ -802,7 +835,7 @@
   local.get $0
   local.get $1
   i32.store offset=4
-  block $memory.fill|inlined.3
+  block $memory.fill|inlined.4
    local.get $3
    global.get $~lib/internal/arraybuffer/HEADER_SIZE
    i32.add
diff --git a/tests/compiler/std/array.optimized.wat b/tests/compiler/std/array.optimized.wat
index 09100d36d7..0322bdb452 100644
--- a/tests/compiler/std/array.optimized.wat
+++ b/tests/compiler/std/array.optimized.wat
@@ -460,34 +460,7 @@
   global.set $~lib/allocator/arena/offset
   local.get $1
  )
- (func $~lib/internal/arraybuffer/allocateUnsafe (; 3 ;) (type $ii) (param $0 i32) (result i32)
-  (local $1 i32)
-  local.get $0
-  i32.const 1073741816
-  i32.gt_u
-  if
-   i32.const 0
-   i32.const 40
-   i32.const 26
-   i32.const 2
-   call $~lib/env/abort
-   unreachable
-  end
-  i32.const 1
-  i32.const 32
-  local.get $0
-  i32.const 7
-  i32.add
-  i32.clz
-  i32.sub
-  i32.shl
-  call $~lib/allocator/arena/__memory_allocate
-  local.tee $1
-  local.get $0
-  i32.store
-  local.get $1
- )
- (func $~lib/internal/memory/memset (; 4 ;) (type $iii_) (param $0 i32) (param $1 i32) (param $2 i32)
+ (func $~lib/internal/memory/memset (; 3 ;) (type $iii_) (param $0 i32) (param $1 i32) (param $2 i32)
   (local $3 i32)
   (local $4 i64)
   local.get $2
@@ -722,6 +695,39 @@
    end
   end
  )
+ (func $~lib/internal/arraybuffer/allocateZeroedUnsafe (; 4 ;) (type $ii) (param $0 i32) (result i32)
+  (local $1 i32)
+  local.get $0
+  i32.const 1073741816
+  i32.gt_u
+  if
+   i32.const 0
+   i32.const 40
+   i32.const 30
+   i32.const 2
+   call $~lib/env/abort
+   unreachable
+  end
+  i32.const 1
+  i32.const 32
+  local.get $0
+  i32.const 7
+  i32.add
+  i32.clz
+  i32.sub
+  i32.shl
+  call $~lib/allocator/arena/__memory_allocate
+  local.tee $1
+  local.get $0
+  i32.store
+  local.get $1
+  i32.const 8
+  i32.add
+  i32.const 0
+  local.get $0
+  call $~lib/internal/memory/memset
+  local.get $1
+ )
  (func $~lib/array/Array<i32>#constructor (; 5 ;) (type $FUNCSIG$ii) (param $0 i32) (result i32)
   (local $1 i32)
   (local $2 i32)
@@ -741,7 +747,7 @@
   i32.const 2
   i32.shl
   local.tee $3
-  call $~lib/internal/arraybuffer/allocateUnsafe
+  call $~lib/internal/arraybuffer/allocateZeroedUnsafe
   local.set $2
   i32.const 8
   call $~lib/allocator/arena/__memory_allocate
@@ -779,7 +785,7 @@
    unreachable
   end
   local.get $1
-  call $~lib/internal/arraybuffer/allocateUnsafe
+  call $~lib/internal/arraybuffer/allocateZeroedUnsafe
   local.tee $2
   i32.const 8
   i32.add
@@ -2258,30 +2264,36 @@
    end
   end
  )
- (func $~lib/internal/arraybuffer/reallocateUnsafe (; 15 ;) (type $iii) (param $0 i32) (param $1 i32) (result i32)
+ (func $~lib/internal/arraybuffer/reallocateZeroedUnsafe (; 15 ;) (type $iii) (param $0 i32) (param $1 i32) (result i32)
   (local $2 i32)
   (local $3 i32)
-  local.get $1
+  (local $4 i32)
+  (local $5 i32)
   local.get $0
   i32.load
+  local.tee $4
+  local.set $3
+  local.get $1
   local.tee $2
-  i32.gt_s
+  i32.const 0
+  i32.lt_s
   if
-   local.get $1
-   i32.const 1073741816
-   i32.gt_s
-   if
-    i32.const 0
-    i32.const 40
-    i32.const 40
-    i32.const 4
-    call $~lib/env/abort
-    unreachable
-   end
-   local.get $1
+   i32.const 0
+   i32.const 40
+   i32.const 67
+   i32.const 2
+   call $~lib/env/abort
+   unreachable
+  end
+  block $~lib/internal/arraybuffer/_realocateUnsafe|inlined.0
+   local.get $2
+   local.get $3
+   i32.eq
+   br_if $~lib/internal/arraybuffer/_realocateUnsafe|inlined.0
+   local.get $2
    i32.const 1
    i32.const 32
-   local.get $2
+   local.get $3
    i32.const 7
    i32.add
    i32.clz
@@ -2292,54 +2304,81 @@
    i32.le_s
    if
     local.get $0
-    local.get $1
-    i32.store
-   else    
-    local.get $1
-    call $~lib/internal/arraybuffer/allocateUnsafe
-    local.tee $3
-    i32.const 8
-    i32.add
-    local.get $0
-    i32.const 8
-    i32.add
     local.get $2
-    call $~lib/internal/memory/memmove
-    local.get $3
-    local.set $0
+    i32.store
+    br $~lib/internal/arraybuffer/_realocateUnsafe|inlined.0
    end
    local.get $0
-   i32.const 8
-   i32.add
-   local.get $2
-   i32.add
-   i32.const 0
-   local.get $1
+   local.set $5
+   local.get $3
+   local.set $0
    local.get $2
-   i32.sub
-   call $~lib/internal/memory/memset
-  else   
-   local.get $1
+   local.get $5
+   i32.load
+   i32.gt_s
+   local.tee $3
+   if (result i32)
+    local.get $2
+    i32.const 1073741816
+    i32.le_s
+   else    
+    local.get $3
+   end
+   i32.eqz
+   if
+    i32.const 0
+    i32.const 40
+    i32.const 53
+    i32.const 2
+    call $~lib/env/abort
+    unreachable
+   end
    local.get $2
-   i32.lt_s
+   local.tee $3
+   i32.const 1073741816
+   i32.gt_u
    if
-    local.get $1
     i32.const 0
-    i32.lt_s
-    if
-     i32.const 0
-     i32.const 40
-     i32.const 62
-     i32.const 4
-     call $~lib/env/abort
-     unreachable
-    end
-    local.get $0
-    local.get $1
-    i32.store
+    i32.const 40
+    i32.const 30
+    i32.const 2
+    call $~lib/env/abort
+    unreachable
    end
+   i32.const 1
+   i32.const 32
+   local.get $3
+   i32.const 7
+   i32.add
+   i32.clz
+   i32.sub
+   i32.shl
+   call $~lib/allocator/arena/__memory_allocate
+   local.tee $2
+   local.get $3
+   i32.store
+   local.get $2
+   i32.const 8
+   i32.add
+   local.get $5
+   i32.const 8
+   i32.add
+   local.get $0
+   call $~lib/internal/memory/memmove
+   local.get $2
+   local.set $0
   end
   local.get $0
+  i32.const 8
+  i32.add
+  local.get $4
+  i32.add
+  i32.const 0
+  local.get $1
+  local.get $4
+  i32.sub
+  call $~lib/internal/memory/memset
+  local.get $0
  )
  (func $~lib/array/Array<i32>#push (; 16 ;) (type $iii) (param $0 i32) (param $1 i32) (result i32)
   (local $2 i32)
@@ -2376,7 +2415,7 @@
    local.get $3
    i32.const 2
    i32.shl
-   call $~lib/internal/arraybuffer/reallocateUnsafe
+   call $~lib/internal/arraybuffer/reallocateZeroedUnsafe
    local.tee $4
    i32.store
   end
@@ -2705,7 +2744,7 @@
    local.get $4
    i32.const 2
    i32.shl
-   call $~lib/internal/arraybuffer/reallocateUnsafe
+   call $~lib/internal/arraybuffer/reallocateZeroedUnsafe
    local.tee $2
    i32.load
    i32.const 2
@@ -3055,7 +3094,7 @@
    local.tee $4
    i32.const 2
    i32.shl
-   call $~lib/internal/arraybuffer/reallocateUnsafe
+   call $~lib/internal/arraybuffer/reallocateZeroedUnsafe
    local.tee $3
    i32.store
    local.get $0
diff --git a/tests/compiler/std/array.untouched.wat b/tests/compiler/std/array.untouched.wat
index 644f3bff85..8d51a3e7ec 100644
--- a/tests/compiler/std/array.untouched.wat
+++ b/tests/compiler/std/array.untouched.wat
@@ -532,41 +532,7 @@
   global.set $~lib/allocator/arena/offset
   local.get $1
  )
- (func $~lib/internal/arraybuffer/allocateUnsafe (; 4 ;) (type $ii) (param $0 i32) (result i32)
-  (local $1 i32)
-  (local $2 i32)
-  local.get $0
-  global.get $~lib/internal/arraybuffer/MAX_BLENGTH
-  i32.le_u
-  i32.eqz
-  if
-   i32.const 0
-   i32.const 40
-   i32.const 26
-   i32.const 2
-   call $~lib/env/abort
-   unreachable
-  end
-  block $~lib/memory/memory.allocate|inlined.0 (result i32)
-   local.get $0
-   call $~lib/internal/arraybuffer/computeSize
-   local.set $2
-   local.get $2
-   call $~lib/allocator/arena/__memory_allocate
-   br $~lib/memory/memory.allocate|inlined.0
-  end
-  local.set $1
-  local.get $1
-  local.get $0
-  i32.store
-  local.get $1
- )
- (func $~lib/memory/memory.allocate (; 5 ;) (type $ii) (param $0 i32) (result i32)
-  local.get $0
-  call $~lib/allocator/arena/__memory_allocate
-  return
- )
- (func $~lib/internal/memory/memset (; 6 ;) (type $iii_) (param $0 i32) (param $1 i32) (param $2 i32)
+ (func $~lib/internal/memory/memset (; 4 ;) (type $iii_) (param $0 i32) (param $1 i32) (param $2 i32)
   (local $3 i32)
   (local $4 i32)
   (local $5 i64)
@@ -820,6 +786,73 @@
    end
   end
  )
+ (func $~lib/internal/arraybuffer/allocateZeroedUnsafe (; 5 ;) (type $ii) (param $0 i32) (result i32)
+  (local $1 i32)
+  (local $2 i32)
+  (local $3 i32)
+  (local $4 i32)
+  (local $5 i32)
+  block $~lib/internal/arraybuffer/_allocateUnsafe|inlined.0 (result i32)
+   local.get $0
+   local.set $1
+   local.get $1
+   global.get $~lib/internal/arraybuffer/MAX_BLENGTH
+   i32.le_u
+   i32.eqz
+   if
+    i32.const 0
+    i32.const 40
+    i32.const 30
+    i32.const 2
+    call $~lib/env/abort
+    unreachable
+   end
+   block $~lib/memory/memory.allocate|inlined.0 (result i32)
+    local.get $1
+    call $~lib/internal/arraybuffer/computeSize
+    local.set $2
+    local.get $2
+    call $~lib/allocator/arena/__memory_allocate
+    br $~lib/memory/memory.allocate|inlined.0
+   end
+   local.set $2
+   block $~lib/internal/arraybuffer/_resize|inlined.0 (result i32)
+    local.get $2
+    local.set $3
+    local.get $1
+    local.set $4
+    local.get $3
+    local.get $4
+    i32.store
+    local.get $3
+   end
+  end
+  local.set $5
+  block $memory.fill|inlined.0
+   block $~lib/arraybuffer/ArrayBuffer#get:data|inlined.0 (result i32)
+    local.get $5
+    local.set $2
+    local.get $2
+    global.get $~lib/internal/arraybuffer/HEADER_SIZE
+    i32.add
+   end
+   local.set $2
+   i32.const 0
+   local.set $1
+   local.get $0
+   local.set $4
+   local.get $2
+   local.get $1
+   local.get $4
+   call $~lib/internal/memory/memset
+  end
+  local.get $5
+ )
+ (func $~lib/memory/memory.allocate (; 6 ;) (type $ii) (param $0 i32) (result i32)
+  local.get $0
+  call $~lib/allocator/arena/__memory_allocate
+  return
+ )
  (func $~lib/array/Array<i32>#constructor (; 7 ;) (type $iii) (param $0 i32) (param $1 i32) (result i32)
   (local $2 i32)
   (local $3 i32)
@@ -842,7 +875,7 @@
   i32.shl
   local.set $2
   local.get $2
-  call $~lib/internal/arraybuffer/allocateUnsafe
+  call $~lib/internal/arraybuffer/allocateZeroedUnsafe
   local.set $3
   block (result i32)
    local.get $0
@@ -865,7 +898,7 @@
   local.get $0
   local.get $1
   i32.store offset=4
-  block $memory.fill|inlined.0
+  block $memory.fill|inlined.1
    local.get $3
    global.get $~lib/internal/arraybuffer/HEADER_SIZE
    i32.add
@@ -943,9 +976,9 @@
   i32.shl
   local.set $2
   local.get $2
-  call $~lib/internal/arraybuffer/allocateUnsafe
+  call $~lib/internal/arraybuffer/allocateZeroedUnsafe
   local.set $3
-  block $memory.fill|inlined.1
+  block $memory.fill|inlined.2
    local.get $3
    global.get $~lib/internal/arraybuffer/HEADER_SIZE
    i32.add
@@ -2902,110 +2935,186 @@
  (func $~lib/allocator/arena/__memory_free (; 28 ;) (type $i_) (param $0 i32)
   nop
  )
- (func $~lib/internal/arraybuffer/reallocateUnsafe (; 29 ;) (type $iii) (param $0 i32) (param $1 i32) (result i32)
+ (func $~lib/internal/arraybuffer/reallocateZeroedUnsafe (; 29 ;) (type $iii) (param $0 i32) (param $1 i32) (result i32)
   (local $2 i32)
   (local $3 i32)
   (local $4 i32)
   (local $5 i32)
   (local $6 i32)
+  (local $7 i32)
+  (local $8 i32)
+  (local $9 i32)
+  (local $10 i32)
+  (local $11 i32)
+  (local $12 i32)
   local.get $0
   i32.load
   local.set $2
-  local.get $1
-  local.get $2
-  i32.gt_s
-  if
+  block $~lib/internal/arraybuffer/_realocateUnsafe|inlined.0 (result i32)
+   local.get $0
+   local.set $3
+   local.get $2
+   local.set $4
    local.get $1
-   global.get $~lib/internal/arraybuffer/MAX_BLENGTH
-   i32.le_s
+   local.set $5
+   local.get $5
+   i32.const 0
+   i32.ge_s
    i32.eqz
    if
     i32.const 0
     i32.const 40
-    i32.const 40
-    i32.const 4
+    i32.const 67
+    i32.const 2
     call $~lib/env/abort
     unreachable
    end
-   local.get $1
-   local.get $2
+   local.get $5
+   local.get $4
+   i32.eq
+   if
+    local.get $3
+    br $~lib/internal/arraybuffer/_realocateUnsafe|inlined.0
+   end
+   local.get $5
+   local.get $4
    call $~lib/internal/arraybuffer/computeSize
    global.get $~lib/internal/arraybuffer/HEADER_SIZE
    i32.sub
    i32.le_s
    if
-    local.get $0
-    local.get $1
-    i32.store
-   else    
-    local.get $1
-    call $~lib/internal/arraybuffer/allocateUnsafe
-    local.set $3
-    block $memory.copy|inlined.0
+    block $~lib/internal/arraybuffer/_resize|inlined.1 (result i32)
      local.get $3
-     global.get $~lib/internal/arraybuffer/HEADER_SIZE
-     i32.add
-     local.set $4
-     local.get $0
-     global.get $~lib/internal/arraybuffer/HEADER_SIZE
-     i32.add
-     local.set $5
-     local.get $2
      local.set $6
-     local.get $4
      local.get $5
+     local.set $7
      local.get $6
-     call $~lib/internal/memory/memmove
-    end
-    block $~lib/memory/memory.free|inlined.0
-     local.get $0
-     local.set $6
+     local.get $7
+     i32.store
      local.get $6
-     call $~lib/allocator/arena/__memory_free
-     br $~lib/memory/memory.free|inlined.0
     end
-    local.get $3
-    local.set $0
+    br $~lib/internal/arraybuffer/_realocateUnsafe|inlined.0
    end
-   block $memory.fill|inlined.3
-    local.get $0
-    global.get $~lib/internal/arraybuffer/HEADER_SIZE
-    i32.add
-    local.get $2
-    i32.add
-    local.set $3
-    i32.const 0
-    local.set $6
-    local.get $1
-    local.get $2
-    i32.sub
-    local.set $5
+   block $~lib/internal/arraybuffer/_growUnsafe|inlined.0 (result i32)
     local.get $3
-    local.get $6
+    local.set $7
+    local.get $4
+    local.set $6
     local.get $5
-    call $~lib/internal/memory/memset
-   end
-  else   
-   local.get $1
-   local.get $2
-   i32.lt_s
-   if
-    local.get $1
-    i32.const 0
-    i32.ge_s
+    local.set $8
+    local.get $8
+    local.get $7
+    i32.load
+    i32.gt_s
+    local.tee $9
+    if (result i32)
+     local.get $8
+     global.get $~lib/internal/arraybuffer/MAX_BLENGTH
+     i32.le_s
+    else     
+     local.get $9
+    end
     i32.eqz
     if
      i32.const 0
      i32.const 40
-     i32.const 62
-     i32.const 4
+     i32.const 53
+     i32.const 2
      call $~lib/env/abort
      unreachable
     end
+    block $~lib/internal/arraybuffer/_allocateUnsafe|inlined.1 (result i32)
+     local.get $8
+     local.set $9
+     local.get $9
+     global.get $~lib/internal/arraybuffer/MAX_BLENGTH
+     i32.le_u
+     i32.eqz
+     if
+      i32.const 0
+      i32.const 40
+      i32.const 30
+      i32.const 2
+      call $~lib/env/abort
+      unreachable
+     end
+     block $~lib/memory/memory.allocate|inlined.1 (result i32)
+      local.get $9
+      call $~lib/internal/arraybuffer/computeSize
+      local.set $10
+      local.get $10
+      call $~lib/allocator/arena/__memory_allocate
+      br $~lib/memory/memory.allocate|inlined.1
+     end
+     local.set $10
+     block $~lib/internal/arraybuffer/_resize|inlined.2 (result i32)
+      local.get $10
+      local.set $11
+      local.get $9
+      local.set $12
+      local.get $11
+      local.get $12
+      i32.store
+      local.get $11
+     end
+    end
+    local.set $10
+    block $memory.copy|inlined.0
+     block $~lib/arraybuffer/ArrayBuffer#get:data|inlined.1 (result i32)
+      local.get $10
+      local.set $9
+      local.get $9
+      global.get $~lib/internal/arraybuffer/HEADER_SIZE
+      i32.add
+     end
+     local.set $9
+     block $~lib/arraybuffer/ArrayBuffer#get:data|inlined.2 (result i32)
+      local.get $7
+      local.set $12
+      local.get $12
+      global.get $~lib/internal/arraybuffer/HEADER_SIZE
+      i32.add
+     end
+     local.set $12
+     local.get $6
+     local.set $11
+     local.get $9
+     local.get $12
+     local.get $11
+     call $~lib/internal/memory/memmove
+    end
+    block $~lib/memory/memory.free|inlined.0
+     local.get $7
+     local.set $11
+     local.get $11
+     call $~lib/allocator/arena/__memory_free
+     br $~lib/memory/memory.free|inlined.0
+    end
+    local.get $10
+   end
+  end
+  local.set $0
+  block $memory.fill|inlined.4
+   block $~lib/arraybuffer/ArrayBuffer#get:data|inlined.3 (result i32)
     local.get $0
-    local.get $1
-    i32.store
+    local.set $5
+    local.get $5
+    global.get $~lib/internal/arraybuffer/HEADER_SIZE
+    i32.add
    end
+   local.get $2
+   i32.add
+   local.set $5
+   i32.const 0
+   local.set $4
+   local.get $1
+   local.get $2
+   i32.sub
+   local.set $3
+   local.get $5
+   local.get $4
+   local.get $3
+   call $~lib/internal/memory/memset
   end
   local.get $0
  )
@@ -3052,7 +3161,7 @@
    local.get $5
    i32.const 2
    i32.shl
-   call $~lib/internal/arraybuffer/reallocateUnsafe
+   call $~lib/internal/arraybuffer/reallocateZeroedUnsafe
    local.set $3
    local.get $0
    local.get $3
@@ -3587,7 +3696,7 @@
    local.get $5
    i32.const 2
    i32.shl
-   call $~lib/internal/arraybuffer/reallocateUnsafe
+   call $~lib/internal/arraybuffer/reallocateZeroedUnsafe
    local.set $2
    local.get $2
    i32.load
@@ -4114,7 +4223,7 @@
    i32.add
    i32.const 2
    i32.shl
-   call $~lib/internal/arraybuffer/reallocateUnsafe
+   call $~lib/internal/arraybuffer/reallocateZeroedUnsafe
    local.set $3
    local.get $0
    local.get $3
@@ -4692,7 +4801,7 @@
   i32.shl
   local.set $2
   local.get $2
-  call $~lib/internal/arraybuffer/allocateUnsafe
+  call $~lib/internal/arraybuffer/allocateZeroedUnsafe
   local.set $3
   block (result i32)
    local.get $0
@@ -4715,7 +4824,7 @@
   local.get $0
   local.get $1
   i32.store offset=4
-  block $memory.fill|inlined.4
+  block $memory.fill|inlined.5
    local.get $3
    global.get $~lib/internal/arraybuffer/HEADER_SIZE
    i32.add
@@ -5716,15 +5825,15 @@
   i32.const 2
   i32.shl
   local.set $4
-  block $~lib/memory/memory.allocate|inlined.1 (result i32)
+  block $~lib/memory/memory.allocate|inlined.2 (result i32)
    local.get $4
    local.set $5
    local.get $5
    call $~lib/allocator/arena/__memory_allocate
-   br $~lib/memory/memory.allocate|inlined.1
+   br $~lib/memory/memory.allocate|inlined.2
   end
   local.set $6
-  block $memory.fill|inlined.5
+  block $memory.fill|inlined.6
    local.get $6
    local.set $5
    i32.const 0
@@ -6675,15 +6784,15 @@
   i32.const 2
   i32.shl
   local.set $4
-  block $~lib/memory/memory.allocate|inlined.2 (result i32)
+  block $~lib/memory/memory.allocate|inlined.3 (result i32)
    local.get $4
    local.set $5
    local.get $5
    call $~lib/allocator/arena/__memory_allocate
-   br $~lib/memory/memory.allocate|inlined.2
+   br $~lib/memory/memory.allocate|inlined.3
   end
   local.set $6
-  block $memory.fill|inlined.6
+  block $memory.fill|inlined.7
    local.get $6
    local.set $5
    i32.const 0
@@ -7667,15 +7776,15 @@
   i32.const 2
   i32.shl
   local.set $4
-  block $~lib/memory/memory.allocate|inlined.3 (result i32)
+  block $~lib/memory/memory.allocate|inlined.4 (result i32)
    local.get $4
    local.set $5
    local.get $5
    call $~lib/allocator/arena/__memory_allocate
-   br $~lib/memory/memory.allocate|inlined.3
+   br $~lib/memory/memory.allocate|inlined.4
   end
   local.set $6
-  block $memory.fill|inlined.7
+  block $memory.fill|inlined.8
    local.get $6
    local.set $5
    i32.const 0
@@ -8513,15 +8622,15 @@
   i32.const 2
   i32.shl
   local.set $4
-  block $~lib/memory/memory.allocate|inlined.4 (result i32)
+  block $~lib/memory/memory.allocate|inlined.5 (result i32)
    local.get $4
    local.set $5
    local.get $5
    call $~lib/allocator/arena/__memory_allocate
-   br $~lib/memory/memory.allocate|inlined.4
+   br $~lib/memory/memory.allocate|inlined.5
   end
   local.set $6
-  block $memory.fill|inlined.8
+  block $memory.fill|inlined.9
    local.get $6
    local.set $5
    i32.const 0
@@ -9473,7 +9582,7 @@
   i32.shl
   local.set $2
   local.get $2
-  call $~lib/internal/arraybuffer/allocateUnsafe
+  call $~lib/internal/arraybuffer/allocateZeroedUnsafe
   local.set $3
   block (result i32)
    local.get $0
@@ -9496,7 +9605,7 @@
   local.get $0
   local.get $1
   i32.store offset=4
-  block $memory.fill|inlined.9
+  block $memory.fill|inlined.10
    local.get $3
    global.get $~lib/internal/arraybuffer/HEADER_SIZE
    i32.add
@@ -9548,7 +9657,7 @@
    i32.add
    i32.const 2
    i32.shl
-   call $~lib/internal/arraybuffer/reallocateUnsafe
+   call $~lib/internal/arraybuffer/reallocateZeroedUnsafe
    local.set $3
    local.get $0
    local.get $3
@@ -10048,7 +10157,7 @@
   i32.shl
   local.set $2
   local.get $2
-  call $~lib/internal/arraybuffer/allocateUnsafe
+  call $~lib/internal/arraybuffer/allocateZeroedUnsafe
   local.set $3
   block (result i32)
    local.get $0
@@ -10071,7 +10180,7 @@
   local.get $0
   local.get $1
   i32.store offset=4
-  block $memory.fill|inlined.10
+  block $memory.fill|inlined.11
    local.get $3
    global.get $~lib/internal/arraybuffer/HEADER_SIZE
    i32.add
@@ -10136,7 +10245,7 @@
    i32.add
    i32.const 2
    i32.shl
-   call $~lib/internal/arraybuffer/reallocateUnsafe
+   call $~lib/internal/arraybuffer/reallocateZeroedUnsafe
    local.set $3
    local.get $0
    local.get $3
@@ -11268,7 +11377,7 @@
   i32.shl
   local.set $2
   local.get $2
-  call $~lib/internal/arraybuffer/allocateUnsafe
+  call $~lib/internal/arraybuffer/allocateZeroedUnsafe
   local.set $3
   block (result i32)
    local.get $0
@@ -11291,7 +11400,7 @@
   local.get $0
   local.get $1
   i32.store offset=4
-  block $memory.fill|inlined.11
+  block $memory.fill|inlined.12
    local.get $3
    global.get $~lib/internal/arraybuffer/HEADER_SIZE
    i32.add
@@ -11330,7 +11439,7 @@
    call $~lib/env/abort
    unreachable
   end
-  block $~lib/memory/memory.allocate|inlined.5 (result i32)
+  block $~lib/memory/memory.allocate|inlined.6 (result i32)
    global.get $~lib/internal/string/HEADER_SIZE
    local.get $0
    i32.const 1
@@ -11339,7 +11448,7 @@
    local.set $1
    local.get $1
    call $~lib/allocator/arena/__memory_allocate
-   br $~lib/memory/memory.allocate|inlined.5
+   br $~lib/memory/memory.allocate|inlined.6
   end
   local.set $2
   local.get $2
@@ -11558,7 +11667,7 @@
    i32.add
    i32.const 2
    i32.shl
-   call $~lib/internal/arraybuffer/reallocateUnsafe
+   call $~lib/internal/arraybuffer/reallocateZeroedUnsafe
    local.set $3
    local.get $0
    local.get $3
@@ -14831,7 +14940,7 @@
   i32.shl
   local.set $2
   local.get $2
-  call $~lib/internal/arraybuffer/allocateUnsafe
+  call $~lib/internal/arraybuffer/allocateZeroedUnsafe
   local.set $3
   block (result i32)
    local.get $0
@@ -14854,7 +14963,7 @@
   local.get $0
   local.get $1
   i32.store offset=4
-  block $memory.fill|inlined.12
+  block $memory.fill|inlined.13
    local.get $3
    global.get $~lib/internal/arraybuffer/HEADER_SIZE
    i32.add
diff --git a/tests/compiler/std/arraybuffer.optimized.wat b/tests/compiler/std/arraybuffer.optimized.wat
index c8c82b8845..0e11b55f86 100644
--- a/tests/compiler/std/arraybuffer.optimized.wat
+++ b/tests/compiler/std/arraybuffer.optimized.wat
@@ -91,34 +91,7 @@
   global.set $~lib/allocator/arena/offset
   local.get $1
  )
- (func $~lib/internal/arraybuffer/allocateUnsafe (; 2 ;) (type $ii) (param $0 i32) (result i32)
-  (local $1 i32)
-  local.get $0
-  i32.const 1073741816
-  i32.gt_u
-  if
-   i32.const 0
-   i32.const 56
-   i32.const 26
-   i32.const 2
-   call $~lib/env/abort
-   unreachable
-  end
-  i32.const 1
-  i32.const 32
-  local.get $0
-  i32.const 7
-  i32.add
-  i32.clz
-  i32.sub
-  i32.shl
-  call $~lib/allocator/arena/__memory_allocate
-  local.tee $1
-  local.get $0
-  i32.store
-  local.get $1
- )
- (func $~lib/internal/memory/memset (; 3 ;) (type $FUNCSIG$vii) (param $0 i32) (param $1 i32)
+ (func $~lib/internal/memory/memset (; 2 ;) (type $FUNCSIG$vii) (param $0 i32) (param $1 i32)
   (local $2 i32)
   local.get $1
   i32.eqz
@@ -337,6 +310,38 @@
    end
   end
  )
+ (func $~lib/internal/arraybuffer/allocateZeroedUnsafe (; 3 ;) (type $ii) (param $0 i32) (result i32)
+  (local $1 i32)
+  local.get $0
+  i32.const 1073741816
+  i32.gt_u
+  if
+   i32.const 0
+   i32.const 56
+   i32.const 30
+   i32.const 2
+   call $~lib/env/abort
+   unreachable
+  end
+  i32.const 1
+  i32.const 32
+  local.get $0
+  i32.const 7
+  i32.add
+  i32.clz
+  i32.sub
+  i32.shl
+  call $~lib/allocator/arena/__memory_allocate
+  local.tee $1
+  local.get $0
+  i32.store
+  local.get $1
+  i32.const 8
+  i32.add
+  local.get $0
+  call $~lib/internal/memory/memset
+  local.get $1
+ )
  (func $~lib/internal/memory/memcpy (; 4 ;) (type $iii_) (param $0 i32) (param $1 i32) (param $2 i32)
   (local $3 i32)
   (local $4 i32)
@@ -1492,7 +1497,7 @@
   i32.gt_s
   select
   local.tee $3
-  call $~lib/internal/arraybuffer/allocateUnsafe
+  call $~lib/internal/arraybuffer/allocateZeroedUnsafe
   local.tee $2
   i32.const 8
   i32.add
@@ -1541,7 +1546,7 @@
    unreachable
   end
   local.get $1
-  call $~lib/internal/arraybuffer/allocateUnsafe
+  call $~lib/internal/arraybuffer/allocateZeroedUnsafe
   local.tee $2
   i32.const 8
   i32.add
@@ -1591,7 +1596,7 @@
   i32.const 2
   i32.shl
   local.tee $1
-  call $~lib/internal/arraybuffer/allocateUnsafe
+  call $~lib/internal/arraybuffer/allocateZeroedUnsafe
   local.tee $2
   i32.const 8
   i32.add
@@ -1717,7 +1722,7 @@
   global.get $~lib/allocator/arena/startOffset
   global.set $~lib/allocator/arena/offset
   i32.const 8
-  call $~lib/internal/arraybuffer/allocateUnsafe
+  call $~lib/internal/arraybuffer/allocateZeroedUnsafe
   local.tee $0
   i32.const 8
   i32.add
diff --git a/tests/compiler/std/arraybuffer.untouched.wat b/tests/compiler/std/arraybuffer.untouched.wat
index cbefd3bdb1..af2509bab5 100644
--- a/tests/compiler/std/arraybuffer.untouched.wat
+++ b/tests/compiler/std/arraybuffer.untouched.wat
@@ -125,36 +125,7 @@
   global.set $~lib/allocator/arena/offset
   local.get $1
  )
- (func $~lib/internal/arraybuffer/allocateUnsafe (; 3 ;) (type $ii) (param $0 i32) (result i32)
-  (local $1 i32)
-  (local $2 i32)
-  local.get $0
-  global.get $~lib/internal/arraybuffer/MAX_BLENGTH
-  i32.le_u
-  i32.eqz
-  if
-   i32.const 0
-   i32.const 56
-   i32.const 26
-   i32.const 2
-   call $~lib/env/abort
-   unreachable
-  end
-  block $~lib/memory/memory.allocate|inlined.0 (result i32)
-   local.get $0
-   call $~lib/internal/arraybuffer/computeSize
-   local.set $2
-   local.get $2
-   call $~lib/allocator/arena/__memory_allocate
-   br $~lib/memory/memory.allocate|inlined.0
-  end
-  local.set $1
-  local.get $1
-  local.get $0
-  i32.store
-  local.get $1
- )
- (func $~lib/internal/memory/memset (; 4 ;) (type $iii_) (param $0 i32) (param $1 i32) (param $2 i32)
+ (func $~lib/internal/memory/memset (; 3 ;) (type $iii_) (param $0 i32) (param $1 i32) (param $2 i32)
   (local $3 i32)
   (local $4 i32)
   (local $5 i64)
@@ -408,6 +379,68 @@
    end
   end
  )
+ (func $~lib/internal/arraybuffer/allocateZeroedUnsafe (; 4 ;) (type $ii) (param $0 i32) (result i32)
+  (local $1 i32)
+  (local $2 i32)
+  (local $3 i32)
+  (local $4 i32)
+  (local $5 i32)
+  block $~lib/internal/arraybuffer/_allocateUnsafe|inlined.0 (result i32)
+   local.get $0
+   local.set $1
+   local.get $1
+   global.get $~lib/internal/arraybuffer/MAX_BLENGTH
+   i32.le_u
+   i32.eqz
+   if
+    i32.const 0
+    i32.const 56
+    i32.const 30
+    i32.const 2
+    call $~lib/env/abort
+    unreachable
+   end
+   block $~lib/memory/memory.allocate|inlined.0 (result i32)
+    local.get $1
+    call $~lib/internal/arraybuffer/computeSize
+    local.set $2
+    local.get $2
+    call $~lib/allocator/arena/__memory_allocate
+    br $~lib/memory/memory.allocate|inlined.0
+   end
+   local.set $2
+   block $~lib/internal/arraybuffer/_resize|inlined.0 (result i32)
+    local.get $2
+    local.set $3
+    local.get $1
+    local.set $4
+    local.get $3
+    local.get $4
+    i32.store
+    local.get $3
+   end
+  end
+  local.set $5
+  block $memory.fill|inlined.0
+   block $~lib/arraybuffer/ArrayBuffer#get:data|inlined.0 (result i32)
+    local.get $5
+    local.set $2
+    local.get $2
+    global.get $~lib/internal/arraybuffer/HEADER_SIZE
+    i32.add
+   end
+   local.set $2
+   i32.const 0
+   local.set $1
+   local.get $0
+   local.set $4
+   local.get $2
+   local.get $1
+   local.get $4
+   call $~lib/internal/memory/memset
+  end
+  local.get $5
+ )
  (func $~lib/arraybuffer/ArrayBuffer#constructor (; 5 ;) (type $iiii) (param $0 i32) (param $1 i32) (param $2 i32) (result i32)
   (local $3 i32)
   (local $4 i32)
@@ -425,7 +458,7 @@
    unreachable
   end
   local.get $1
-  call $~lib/internal/arraybuffer/allocateUnsafe
+  call $~lib/internal/arraybuffer/allocateZeroedUnsafe
   local.set $3
   local.get $2
   i32.const 0
@@ -1949,7 +1982,7 @@
   select
   local.set $6
   local.get $6
-  call $~lib/internal/arraybuffer/allocateUnsafe
+  call $~lib/internal/arraybuffer/allocateZeroedUnsafe
   local.set $7
   block $memory.copy|inlined.0
    local.get $7
@@ -2072,9 +2105,9 @@
   i32.shl
   local.set $2
   local.get $2
-  call $~lib/internal/arraybuffer/allocateUnsafe
+  call $~lib/internal/arraybuffer/allocateZeroedUnsafe
   local.set $3
-  block $memory.fill|inlined.1
+  block $memory.fill|inlined.2
    local.get $3
    global.get $~lib/internal/arraybuffer/HEADER_SIZE
    i32.add
@@ -2153,9 +2186,9 @@
   i32.shl
   local.set $2
   local.get $2
-  call $~lib/internal/arraybuffer/allocateUnsafe
+  call $~lib/internal/arraybuffer/allocateZeroedUnsafe
   local.set $3
-  block $memory.fill|inlined.2
+  block $memory.fill|inlined.3
    local.get $3
    global.get $~lib/internal/arraybuffer/HEADER_SIZE
    i32.add
@@ -2353,14 +2386,14 @@
    call $~lib/env/abort
    unreachable
   end
-  block $~lib/arraybuffer/ArrayBuffer#get:data|inlined.0 (result i32)
+  block $~lib/arraybuffer/ArrayBuffer#get:data|inlined.1 (result i32)
    global.get $std/arraybuffer/sliced
    local.set $0
    local.get $0
    global.get $~lib/internal/arraybuffer/HEADER_SIZE
    i32.add
   end
-  block $~lib/arraybuffer/ArrayBuffer#get:data|inlined.1 (result i32)
+  block $~lib/arraybuffer/ArrayBuffer#get:data|inlined.2 (result i32)
    global.get $std/arraybuffer/buffer
    local.set $0
    local.get $0
diff --git a/tests/compiler/std/dataview.optimized.wat b/tests/compiler/std/dataview.optimized.wat
index c30f1b7920..ae962ed2ae 100644
--- a/tests/compiler/std/dataview.optimized.wat
+++ b/tests/compiler/std/dataview.optimized.wat
@@ -92,34 +92,7 @@
   global.set $~lib/allocator/arena/offset
   local.get $1
  )
- (func $~lib/internal/arraybuffer/allocateUnsafe (; 2 ;) (type $ii) (param $0 i32) (result i32)
-  (local $1 i32)
-  local.get $0
-  i32.const 1073741816
-  i32.gt_u
-  if
-   i32.const 0
-   i32.const 72
-   i32.const 26
-   i32.const 2
-   call $~lib/env/abort
-   unreachable
-  end
-  i32.const 1
-  i32.const 32
-  local.get $0
-  i32.const 7
-  i32.add
-  i32.clz
-  i32.sub
-  i32.shl
-  call $~lib/allocator/arena/__memory_allocate
-  local.tee $1
-  local.get $0
-  i32.store
-  local.get $1
- )
- (func $~lib/internal/memory/memset (; 3 ;) (type $FUNCSIG$vii) (param $0 i32) (param $1 i32)
+ (func $~lib/internal/memory/memset (; 2 ;) (type $FUNCSIG$vii) (param $0 i32) (param $1 i32)
   (local $2 i32)
   local.get $1
   i32.eqz
@@ -338,6 +311,38 @@
    end
   end
  )
+ (func $~lib/internal/arraybuffer/allocateZeroedUnsafe (; 3 ;) (type $ii) (param $0 i32) (result i32)
+  (local $1 i32)
+  local.get $0
+  i32.const 1073741816
+  i32.gt_u
+  if
+   i32.const 0
+   i32.const 72
+   i32.const 30
+   i32.const 2
+   call $~lib/env/abort
+   unreachable
+  end
+  i32.const 1
+  i32.const 32
+  local.get $0
+  i32.const 7
+  i32.add
+  i32.clz
+  i32.sub
+  i32.shl
+  call $~lib/allocator/arena/__memory_allocate
+  local.tee $1
+  local.get $0
+  i32.store
+  local.get $1
+  i32.const 8
+  i32.add
+  local.get $0
+  call $~lib/internal/memory/memset
+  local.get $1
+ )
  (func $~lib/internal/typedarray/TypedArray<u8>#constructor (; 4 ;) (type $iii) (param $0 i32) (param $1 i32) (result i32)
   (local $2 i32)
   local.get $1
@@ -352,7 +357,7 @@
    unreachable
   end
   local.get $1
-  call $~lib/internal/arraybuffer/allocateUnsafe
+  call $~lib/internal/arraybuffer/allocateZeroedUnsafe
   local.tee $2
   i32.const 8
   i32.add
diff --git a/tests/compiler/std/dataview.untouched.wat b/tests/compiler/std/dataview.untouched.wat
index 6dc7ace494..f48d5ea990 100644
--- a/tests/compiler/std/dataview.untouched.wat
+++ b/tests/compiler/std/dataview.untouched.wat
@@ -127,36 +127,7 @@
   global.set $~lib/allocator/arena/offset
   local.get $1
  )
- (func $~lib/internal/arraybuffer/allocateUnsafe (; 3 ;) (type $ii) (param $0 i32) (result i32)
-  (local $1 i32)
-  (local $2 i32)
-  local.get $0
-  global.get $~lib/internal/arraybuffer/MAX_BLENGTH
-  i32.le_u
-  i32.eqz
-  if
-   i32.const 0
-   i32.const 72
-   i32.const 26
-   i32.const 2
-   call $~lib/env/abort
-   unreachable
-  end
-  block $~lib/memory/memory.allocate|inlined.0 (result i32)
-   local.get $0
-   call $~lib/internal/arraybuffer/computeSize
-   local.set $2
-   local.get $2
-   call $~lib/allocator/arena/__memory_allocate
-   br $~lib/memory/memory.allocate|inlined.0
-  end
-  local.set $1
-  local.get $1
-  local.get $0
-  i32.store
-  local.get $1
- )
- (func $~lib/internal/memory/memset (; 4 ;) (type $iii_) (param $0 i32) (param $1 i32) (param $2 i32)
+ (func $~lib/internal/memory/memset (; 3 ;) (type $iii_) (param $0 i32) (param $1 i32) (param $2 i32)
   (local $3 i32)
   (local $4 i32)
   (local $5 i64)
@@ -410,6 +381,68 @@
    end
   end
  )
+ (func $~lib/internal/arraybuffer/allocateZeroedUnsafe (; 4 ;) (type $ii) (param $0 i32) (result i32)
+  (local $1 i32)
+  (local $2 i32)
+  (local $3 i32)
+  (local $4 i32)
+  (local $5 i32)
+  block $~lib/internal/arraybuffer/_allocateUnsafe|inlined.0 (result i32)
+   local.get $0
+   local.set $1
+   local.get $1
+   global.get $~lib/internal/arraybuffer/MAX_BLENGTH
+   i32.le_u
+   i32.eqz
+   if
+    i32.const 0
+    i32.const 72
+    i32.const 30
+    i32.const 2
+    call $~lib/env/abort
+    unreachable
+   end
+   block $~lib/memory/memory.allocate|inlined.0 (result i32)
+    local.get $1
+    call $~lib/internal/arraybuffer/computeSize
+    local.set $2
+    local.get $2
+    call $~lib/allocator/arena/__memory_allocate
+    br $~lib/memory/memory.allocate|inlined.0
+   end
+   local.set $2
+   block $~lib/internal/arraybuffer/_resize|inlined.0 (result i32)
+    local.get $2
+    local.set $3
+    local.get $1
+    local.set $4
+    local.get $3
+    local.get $4
+    i32.store
+    local.get $3
+   end
+  end
+  local.set $5
+  block $memory.fill|inlined.0
+   block $~lib/arraybuffer/ArrayBuffer#get:data|inlined.0 (result i32)
+    local.get $5
+    local.set $2
+    local.get $2
+    global.get $~lib/internal/arraybuffer/HEADER_SIZE
+    i32.add
+   end
+   local.set $2
+   i32.const 0
+   local.set $1
+   local.get $0
+   local.set $4
+   local.get $2
+   local.get $1
+   local.get $4
+   call $~lib/internal/memory/memset
+  end
+  local.get $5
+ )
  (func $~lib/memory/memory.allocate (; 5 ;) (type $ii) (param $0 i32) (result i32)
   local.get $0
   call $~lib/allocator/arena/__memory_allocate
@@ -437,9 +470,9 @@
   i32.shl
   local.set $2
   local.get $2
-  call $~lib/internal/arraybuffer/allocateUnsafe
+  call $~lib/internal/arraybuffer/allocateZeroedUnsafe
   local.set $3
-  block $memory.fill|inlined.0
+  block $memory.fill|inlined.1
    local.get $3
    global.get $~lib/internal/arraybuffer/HEADER_SIZE
    i32.add
diff --git a/tests/compiler/std/gc-array.optimized.wat b/tests/compiler/std/gc-array.optimized.wat
index b11a1bfbca..cc19c9e2c0 100644
--- a/tests/compiler/std/gc-array.optimized.wat
+++ b/tests/compiler/std/gc-array.optimized.wat
@@ -410,35 +410,7 @@
   i32.const 16
   i32.add
  )
- (func $~lib/internal/arraybuffer/allocateUnsafe (; 11 ;) (type $ii) (param $0 i32) (result i32)
-  (local $1 i32)
-  local.get $0
-  i32.const 1073741816
-  i32.gt_u
-  if
-   i32.const 0
-   i32.const 120
-   i32.const 26
-   i32.const 2
-   call $~lib/env/abort
-   unreachable
-  end
-  i32.const 1
-  i32.const 32
-  local.get $0
-  i32.const 7
-  i32.add
-  i32.clz
-  i32.sub
-  i32.shl
-  i32.const 6
-  call $~lib/collector/itcm/__gc_allocate
-  local.tee $1
-  local.get $0
-  i32.store
-  local.get $1
- )
- (func $~lib/internal/memory/memcpy (; 12 ;) (type $iii_) (param $0 i32) (param $1 i32) (param $2 i32)
+ (func $~lib/internal/memory/memcpy (; 11 ;) (type $iii_) (param $0 i32) (param $1 i32) (param $2 i32)
   (local $3 i32)
   (local $4 i32)
   (local $5 i32)
@@ -1335,7 +1307,7 @@
    i32.store8
   end
  )
- (func $~lib/internal/memory/memmove (; 13 ;) (type $iii_) (param $0 i32) (param $1 i32) (param $2 i32)
+ (func $~lib/internal/memory/memmove (; 12 ;) (type $iii_) (param $0 i32) (param $1 i32) (param $2 i32)
   (local $3 i32)
   (local $4 i32)
   local.get $0
@@ -1533,7 +1505,7 @@
    end
   end
  )
- (func $~lib/internal/memory/memset (; 14 ;) (type $FUNCSIG$vii) (param $0 i32) (param $1 i32)
+ (func $~lib/internal/memory/memset (; 13 ;) (type $FUNCSIG$vii) (param $0 i32) (param $1 i32)
   (local $2 i32)
   local.get $1
   i32.eqz
@@ -1752,30 +1724,36 @@
    end
   end
  )
- (func $~lib/internal/arraybuffer/reallocateUnsafe (; 15 ;) (type $iii) (param $0 i32) (param $1 i32) (result i32)
+ (func $~lib/internal/arraybuffer/reallocateZeroedUnsafe (; 14 ;) (type $iii) (param $0 i32) (param $1 i32) (result i32)
   (local $2 i32)
   (local $3 i32)
-  local.get $1
+  (local $4 i32)
+  (local $5 i32)
   local.get $0
   i32.load
+  local.tee $4
+  local.set $3
+  local.get $1
   local.tee $2
-  i32.gt_s
+  i32.const 0
+  i32.lt_s
   if
-   local.get $1
-   i32.const 1073741816
-   i32.gt_s
-   if
-    i32.const 0
-    i32.const 120
-    i32.const 40
-    i32.const 4
-    call $~lib/env/abort
-    unreachable
-   end
-   local.get $1
+   i32.const 0
+   i32.const 120
+   i32.const 67
+   i32.const 2
+   call $~lib/env/abort
+   unreachable
+  end
+  block $~lib/internal/arraybuffer/_realocateUnsafe|inlined.0
+   local.get $2
+   local.get $3
+   i32.eq
+   br_if $~lib/internal/arraybuffer/_realocateUnsafe|inlined.0
+   local.get $2
    i32.const 1
    i32.const 32
-   local.get $2
+   local.get $3
    i32.const 7
    i32.add
    i32.clz
@@ -1786,55 +1764,83 @@
    i32.le_s
    if
     local.get $0
-    local.get $1
-    i32.store
-   else    
-    local.get $1
-    call $~lib/internal/arraybuffer/allocateUnsafe
-    local.tee $3
-    i32.const 8
-    i32.add
-    local.get $0
-    i32.const 8
-    i32.add
     local.get $2
-    call $~lib/internal/memory/memmove
-    local.get $3
-    local.set $0
+    i32.store
+    br $~lib/internal/arraybuffer/_realocateUnsafe|inlined.0
    end
    local.get $0
-   i32.const 8
-   i32.add
-   local.get $2
-   i32.add
-   local.get $1
+   local.set $5
+   local.get $3
+   local.set $0
    local.get $2
-   i32.sub
-   call $~lib/internal/memory/memset
-  else   
-   local.get $1
+   local.get $5
+   i32.load
+   i32.gt_s
+   local.tee $3
+   if (result i32)
+    local.get $2
+    i32.const 1073741816
+    i32.le_s
+   else    
+    local.get $3
+   end
+   i32.eqz
+   if
+    i32.const 0
+    i32.const 120
+    i32.const 53
+    i32.const 2
+    call $~lib/env/abort
+    unreachable
+   end
    local.get $2
-   i32.lt_s
+   local.tee $3
+   i32.const 1073741816
+   i32.gt_u
    if
-    local.get $1
     i32.const 0
-    i32.lt_s
-    if
-     i32.const 0
-     i32.const 120
-     i32.const 62
-     i32.const 4
-     call $~lib/env/abort
-     unreachable
-    end
-    local.get $0
-    local.get $1
-    i32.store
+    i32.const 120
+    i32.const 30
+    i32.const 2
+    call $~lib/env/abort
+    unreachable
    end
+   i32.const 1
+   i32.const 32
+   local.get $3
+   i32.const 7
+   i32.add
+   i32.clz
+   i32.sub
+   i32.shl
+   i32.const 6
+   call $~lib/collector/itcm/__gc_allocate
+   local.tee $2
+   local.get $3
+   i32.store
+   local.get $2
+   i32.const 8
+   i32.add
+   local.get $5
+   i32.const 8
+   i32.add
+   local.get $0
+   call $~lib/internal/memory/memmove
+   local.get $2
+   local.set $0
   end
   local.get $0
+  i32.const 8
+  i32.add
+  local.get $4
+  i32.add
+  local.get $1
+  local.get $4
+  i32.sub
+  call $~lib/internal/memory/memset
+  local.get $0
  )
- (func $~lib/collector/itcm/__gc_link (; 16 ;) (type $ii_) (param $0 i32) (param $1 i32)
+ (func $~lib/collector/itcm/__gc_link (; 15 ;) (type $ii_) (param $0 i32) (param $1 i32)
   (local $2 i32)
   global.get $~lib/collector/itcm/white
   i32.eqz
@@ -1864,7 +1870,7 @@
    call $~lib/collector/itcm/ManagedObject#makeGray
   end
  )
- (func $~lib/array/Array<Foo>#__set (; 17 ;) (type $iii_) (param $0 i32) (param $1 i32) (param $2 i32)
+ (func $~lib/array/Array<Foo>#__set (; 16 ;) (type $iii_) (param $0 i32) (param $1 i32) (param $2 i32)
   (local $3 i32)
   (local $4 i32)
   local.get $1
@@ -1895,7 +1901,7 @@
    local.tee $4
    i32.const 2
    i32.shl
-   call $~lib/internal/arraybuffer/reallocateUnsafe
+   call $~lib/internal/arraybuffer/reallocateZeroedUnsafe
    local.tee $3
    i32.store
    local.get $0
@@ -1913,7 +1919,7 @@
   local.get $2
   call $~lib/collector/itcm/__gc_link
  )
- (func $std/gc-array/main (; 18 ;) (type $i) (result i32)
+ (func $std/gc-array/main (; 17 ;) (type $i) (result i32)
   global.get $~started
   i32.eqz
   if
@@ -1923,7 +1929,7 @@
   end
   i32.const 0
  )
- (func $start (; 19 ;) (type $_)
+ (func $start (; 18 ;) (type $_)
   i32.const 184
   global.set $~lib/allocator/arena/startOffset
   global.get $~lib/allocator/arena/startOffset
@@ -1953,7 +1959,7 @@
   call $~lib/array/Array<Foo>#__set
   call $~lib/collector/itcm/__gc_collect
  )
- (func $null (; 20 ;) (type $_)
+ (func $null (; 19 ;) (type $_)
   nop
  )
 )
diff --git a/tests/compiler/std/gc-array.untouched.wat b/tests/compiler/std/gc-array.untouched.wat
index c13743f836..20bbc84d03 100644
--- a/tests/compiler/std/gc-array.untouched.wat
+++ b/tests/compiler/std/gc-array.untouched.wat
@@ -565,31 +565,7 @@
  (func $~lib/internal/arraybuffer/__gc (; 21 ;) (type $i_) (param $0 i32)
   nop
  )
- (func $~lib/internal/arraybuffer/allocateUnsafe (; 22 ;) (type $ii) (param $0 i32) (result i32)
-  (local $1 i32)
-  local.get $0
-  global.get $~lib/internal/arraybuffer/MAX_BLENGTH
-  i32.le_u
-  i32.eqz
-  if
-   i32.const 0
-   i32.const 120
-   i32.const 26
-   i32.const 2
-   call $~lib/env/abort
-   unreachable
-  end
-  local.get $0
-  call $~lib/internal/arraybuffer/computeSize
-  i32.const 6
-  call $~lib/collector/itcm/__gc_allocate
-  local.set $1
-  local.get $1
-  local.get $0
-  i32.store
-  local.get $1
- )
- (func $~lib/internal/memory/memcpy (; 23 ;) (type $iii_) (param $0 i32) (param $1 i32) (param $2 i32)
+ (func $~lib/internal/memory/memcpy (; 22 ;) (type $iii_) (param $0 i32) (param $1 i32) (param $2 i32)
   (local $3 i32)
   (local $4 i32)
   (local $5 i32)
@@ -1790,7 +1766,7 @@
    i32.store8
   end
  )
- (func $~lib/internal/memory/memmove (; 24 ;) (type $iii_) (param $0 i32) (param $1 i32) (param $2 i32)
+ (func $~lib/internal/memory/memmove (; 23 ;) (type $iii_) (param $0 i32) (param $1 i32) (param $2 i32)
   (local $3 i32)
   local.get $0
   local.get $1
@@ -2017,7 +1993,7 @@
    end
   end
  )
- (func $~lib/internal/memory/memset (; 25 ;) (type $iii_) (param $0 i32) (param $1 i32) (param $2 i32)
+ (func $~lib/internal/memory/memset (; 24 ;) (type $iii_) (param $0 i32) (param $1 i32) (param $2 i32)
   (local $3 i32)
   (local $4 i32)
   (local $5 i64)
@@ -2271,107 +2247,179 @@
    end
   end
  )
- (func $~lib/internal/arraybuffer/reallocateUnsafe (; 26 ;) (type $iii) (param $0 i32) (param $1 i32) (result i32)
+ (func $~lib/internal/arraybuffer/reallocateZeroedUnsafe (; 25 ;) (type $iii) (param $0 i32) (param $1 i32) (result i32)
   (local $2 i32)
   (local $3 i32)
   (local $4 i32)
   (local $5 i32)
   (local $6 i32)
+  (local $7 i32)
+  (local $8 i32)
+  (local $9 i32)
+  (local $10 i32)
+  (local $11 i32)
+  (local $12 i32)
   local.get $0
   i32.load
   local.set $2
-  local.get $1
-  local.get $2
-  i32.gt_s
-  if
+  block $~lib/internal/arraybuffer/_realocateUnsafe|inlined.0 (result i32)
+   local.get $0
+   local.set $3
+   local.get $2
+   local.set $4
    local.get $1
-   global.get $~lib/internal/arraybuffer/MAX_BLENGTH
-   i32.le_s
+   local.set $5
+   local.get $5
+   i32.const 0
+   i32.ge_s
    i32.eqz
    if
     i32.const 0
     i32.const 120
-    i32.const 40
-    i32.const 4
+    i32.const 67
+    i32.const 2
     call $~lib/env/abort
     unreachable
    end
-   local.get $1
-   local.get $2
+   local.get $5
+   local.get $4
+   i32.eq
+   if
+    local.get $3
+    br $~lib/internal/arraybuffer/_realocateUnsafe|inlined.0
+   end
+   local.get $5
+   local.get $4
    call $~lib/internal/arraybuffer/computeSize
    global.get $~lib/internal/arraybuffer/HEADER_SIZE
    i32.sub
    i32.le_s
    if
-    local.get $0
-    local.get $1
-    i32.store
-   else    
-    local.get $1
-    call $~lib/internal/arraybuffer/allocateUnsafe
-    local.set $3
-    block $memory.copy|inlined.0
+    block $~lib/internal/arraybuffer/_resize|inlined.0 (result i32)
      local.get $3
-     global.get $~lib/internal/arraybuffer/HEADER_SIZE
-     i32.add
-     local.set $4
-     local.get $0
-     global.get $~lib/internal/arraybuffer/HEADER_SIZE
-     i32.add
-     local.set $5
-     local.get $2
      local.set $6
-     local.get $4
      local.get $5
+     local.set $7
+     local.get $6
+     local.get $7
+     i32.store
      local.get $6
-     call $~lib/internal/memory/memmove
     end
-    local.get $3
-    local.set $0
+    br $~lib/internal/arraybuffer/_realocateUnsafe|inlined.0
    end
-   block $memory.fill|inlined.0
-    local.get $0
-    global.get $~lib/internal/arraybuffer/HEADER_SIZE
-    i32.add
-    local.get $2
-    i32.add
-    local.set $3
-    i32.const 0
-    local.set $6
-    local.get $1
-    local.get $2
-    i32.sub
-    local.set $5
+   block $~lib/internal/arraybuffer/_growUnsafe|inlined.0 (result i32)
     local.get $3
-    local.get $6
+    local.set $7
+    local.get $4
+    local.set $6
     local.get $5
-    call $~lib/internal/memory/memset
-   end
-  else   
-   local.get $1
-   local.get $2
-   i32.lt_s
-   if
-    local.get $1
-    i32.const 0
-    i32.ge_s
+    local.set $8
+    local.get $8
+    local.get $7
+    i32.load
+    i32.gt_s
+    local.tee $9
+    if (result i32)
+     local.get $8
+     global.get $~lib/internal/arraybuffer/MAX_BLENGTH
+     i32.le_s
+    else     
+     local.get $9
+    end
     i32.eqz
     if
      i32.const 0
      i32.const 120
-     i32.const 62
-     i32.const 4
+     i32.const 53
+     i32.const 2
      call $~lib/env/abort
      unreachable
     end
+    block $~lib/internal/arraybuffer/_allocateUnsafe|inlined.0 (result i32)
+     local.get $8
+     local.set $9
+     local.get $9
+     global.get $~lib/internal/arraybuffer/MAX_BLENGTH
+     i32.le_u
+     i32.eqz
+     if
+      i32.const 0
+      i32.const 120
+      i32.const 30
+      i32.const 2
+      call $~lib/env/abort
+      unreachable
+     end
+     local.get $9
+     call $~lib/internal/arraybuffer/computeSize
+     i32.const 6
+     call $~lib/collector/itcm/__gc_allocate
+     local.set $10
+     block $~lib/internal/arraybuffer/_resize|inlined.1 (result i32)
+      local.get $10
+      local.set $11
+      local.get $9
+      local.set $12
+      local.get $11
+      local.get $12
+      i32.store
+      local.get $11
+     end
+    end
+    local.set $10
+    block $memory.copy|inlined.0
+     block $~lib/arraybuffer/ArrayBuffer#get:data|inlined.0 (result i32)
+      local.get $10
+      local.set $9
+      local.get $9
+      global.get $~lib/internal/arraybuffer/HEADER_SIZE
+      i32.add
+     end
+     local.set $9
+     block $~lib/arraybuffer/ArrayBuffer#get:data|inlined.1 (result i32)
+      local.get $7
+      local.set $12
+      local.get $12
+      global.get $~lib/internal/arraybuffer/HEADER_SIZE
+      i32.add
+     end
+     local.set $12
+     local.get $6
+     local.set $11
+     local.get $9
+     local.get $12
+     local.get $11
+     call $~lib/internal/memory/memmove
+    end
+    local.get $10
+   end
+  end
+  local.set $0
+  block $memory.fill|inlined.0
+   block $~lib/arraybuffer/ArrayBuffer#get:data|inlined.2 (result i32)
     local.get $0
-    local.get $1
-    i32.store
+    local.set $5
+    local.get $5
+    global.get $~lib/internal/arraybuffer/HEADER_SIZE
+    i32.add
    end
+   local.get $2
+   i32.add
+   local.set $5
+   i32.const 0
+   local.set $4
+   local.get $1
+   local.get $2
+   i32.sub
+   local.set $3
+   local.get $5
+   local.get $4
+   local.get $3
+   call $~lib/internal/memory/memset
   end
   local.get $0
  )
- (func $~lib/collector/itcm/__gc_link (; 27 ;) (type $ii_) (param $0 i32) (param $1 i32)
+ (func $~lib/collector/itcm/__gc_link (; 26 ;) (type $ii_) (param $0 i32) (param $1 i32)
   (local $2 i32)
   (local $3 i32)
   block $~lib/collector/itcm/refToObj|inlined.1 (result i32)
@@ -2407,7 +2455,7 @@
    call $~lib/collector/itcm/ManagedObject#makeGray
   end
  )
- (func $~lib/array/Array<Foo>#__set (; 28 ;) (type $iii_) (param $0 i32) (param $1 i32) (param $2 i32)
+ (func $~lib/array/Array<Foo>#__set (; 27 ;) (type $iii_) (param $0 i32) (param $1 i32) (param $2 i32)
   (local $3 i32)
   (local $4 i32)
   (local $5 i32)
@@ -2443,7 +2491,7 @@
    i32.add
    i32.const 2
    i32.shl
-   call $~lib/internal/arraybuffer/reallocateUnsafe
+   call $~lib/internal/arraybuffer/reallocateZeroedUnsafe
    local.set $3
    local.get $0
    local.get $3
@@ -2477,7 +2525,7 @@
   local.get $2
   call $~lib/collector/itcm/__gc_link
  )
- (func $std/gc-array/main (; 29 ;) (type $i) (result i32)
+ (func $std/gc-array/main (; 28 ;) (type $i) (result i32)
   global.get $~started
   i32.eqz
   if
@@ -2487,7 +2535,7 @@
   end
   i32.const 0
  )
- (func $start (; 30 ;) (type $_)
+ (func $start (; 29 ;) (type $_)
   (local $0 i32)
   (local $1 i32)
   (local $2 i32)
@@ -2538,9 +2586,9 @@
   call $~lib/array/Array<Foo>#__set
   call $~lib/gc/gc.collect
  )
- (func $null (; 31 ;) (type $_)
+ (func $null (; 30 ;) (type $_)
  )
- (func $~iterateRoots (; 32 ;) (type $i_) (param $0 i32)
+ (func $~iterateRoots (; 31 ;) (type $i_) (param $0 i32)
   global.get $std/gc-array/arr
   local.get $0
   call_indirect (type $i_)
diff --git a/tests/compiler/std/map.optimized.wat b/tests/compiler/std/map.optimized.wat
index 5b298b8748..2361307219 100644
--- a/tests/compiler/std/map.optimized.wat
+++ b/tests/compiler/std/map.optimized.wat
@@ -94,34 +94,7 @@
   global.set $~lib/allocator/arena/offset
   local.get $1
  )
- (func $~lib/internal/arraybuffer/allocateUnsafe (; 2 ;) (type $ii) (param $0 i32) (result i32)
-  (local $1 i32)
-  local.get $0
-  i32.const 1073741816
-  i32.gt_u
-  if
-   i32.const 0
-   i32.const 56
-   i32.const 26
-   i32.const 2
-   call $~lib/env/abort
-   unreachable
-  end
-  i32.const 1
-  i32.const 32
-  local.get $0
-  i32.const 7
-  i32.add
-  i32.clz
-  i32.sub
-  i32.shl
-  call $~lib/allocator/arena/__memory_allocate
-  local.tee $1
-  local.get $0
-  i32.store
-  local.get $1
- )
- (func $~lib/internal/memory/memset (; 3 ;) (type $FUNCSIG$vii) (param $0 i32) (param $1 i32)
+ (func $~lib/internal/memory/memset (; 2 ;) (type $FUNCSIG$vii) (param $0 i32) (param $1 i32)
   (local $2 i32)
   local.get $1
   i32.eqz
@@ -340,6 +313,38 @@
    end
   end
  )
+ (func $~lib/internal/arraybuffer/allocateZeroedUnsafe (; 3 ;) (type $ii) (param $0 i32) (result i32)
+  (local $1 i32)
+  local.get $0
+  i32.const 1073741816
+  i32.gt_u
+  if
+   i32.const 0
+   i32.const 56
+   i32.const 30
+   i32.const 2
+   call $~lib/env/abort
+   unreachable
+  end
+  i32.const 1
+  i32.const 32
+  local.get $0
+  i32.const 7
+  i32.add
+  i32.clz
+  i32.sub
+  i32.shl
+  call $~lib/allocator/arena/__memory_allocate
+  local.tee $1
+  local.get $0
+  i32.store
+  local.get $1
+  i32.const 8
+  i32.add
+  local.get $0
+  call $~lib/internal/memory/memset
+  local.get $1
+ )
  (func $~lib/arraybuffer/ArrayBuffer#constructor (; 4 ;) (type $FUNCSIG$iii) (param $0 i32) (param $1 i32) (result i32)
   (local $2 i32)
   local.get $0
@@ -354,7 +359,7 @@
    unreachable
   end
   local.get $0
-  call $~lib/internal/arraybuffer/allocateUnsafe
+  call $~lib/internal/arraybuffer/allocateZeroedUnsafe
   local.set $2
   local.get $1
   i32.eqz
diff --git a/tests/compiler/std/map.untouched.wat b/tests/compiler/std/map.untouched.wat
index 343bddaa3d..5c75944791 100644
--- a/tests/compiler/std/map.untouched.wat
+++ b/tests/compiler/std/map.untouched.wat
@@ -139,36 +139,7 @@
   i32.sub
   i32.shl
  )
- (func $~lib/internal/arraybuffer/allocateUnsafe (; 4 ;) (type $ii) (param $0 i32) (result i32)
-  (local $1 i32)
-  (local $2 i32)
-  local.get $0
-  global.get $~lib/internal/arraybuffer/MAX_BLENGTH
-  i32.le_u
-  i32.eqz
-  if
-   i32.const 0
-   i32.const 56
-   i32.const 26
-   i32.const 2
-   call $~lib/env/abort
-   unreachable
-  end
-  block $~lib/memory/memory.allocate|inlined.0 (result i32)
-   local.get $0
-   call $~lib/internal/arraybuffer/computeSize
-   local.set $2
-   local.get $2
-   call $~lib/allocator/arena/__memory_allocate
-   br $~lib/memory/memory.allocate|inlined.0
-  end
-  local.set $1
-  local.get $1
-  local.get $0
-  i32.store
-  local.get $1
- )
- (func $~lib/internal/memory/memset (; 5 ;) (type $iii_) (param $0 i32) (param $1 i32) (param $2 i32)
+ (func $~lib/internal/memory/memset (; 4 ;) (type $iii_) (param $0 i32) (param $1 i32) (param $2 i32)
   (local $3 i32)
   (local $4 i32)
   (local $5 i64)
@@ -422,6 +393,68 @@
    end
   end
  )
+ (func $~lib/internal/arraybuffer/allocateZeroedUnsafe (; 5 ;) (type $ii) (param $0 i32) (result i32)
+  (local $1 i32)
+  (local $2 i32)
+  (local $3 i32)
+  (local $4 i32)
+  (local $5 i32)
+  block $~lib/internal/arraybuffer/_allocateUnsafe|inlined.0 (result i32)
+   local.get $0
+   local.set $1
+   local.get $1
+   global.get $~lib/internal/arraybuffer/MAX_BLENGTH
+   i32.le_u
+   i32.eqz
+   if
+    i32.const 0
+    i32.const 56
+    i32.const 30
+    i32.const 2
+    call $~lib/env/abort
+    unreachable
+   end
+   block $~lib/memory/memory.allocate|inlined.0 (result i32)
+    local.get $1
+    call $~lib/internal/arraybuffer/computeSize
+    local.set $2
+    local.get $2
+    call $~lib/allocator/arena/__memory_allocate
+    br $~lib/memory/memory.allocate|inlined.0
+   end
+   local.set $2
+   block $~lib/internal/arraybuffer/_resize|inlined.0 (result i32)
+    local.get $2
+    local.set $3
+    local.get $1
+    local.set $4
+    local.get $3
+    local.get $4
+    i32.store
+    local.get $3
+   end
+  end
+  local.set $5
+  block $memory.fill|inlined.0
+   block $~lib/arraybuffer/ArrayBuffer#get:data|inlined.0 (result i32)
+    local.get $5
+    local.set $2
+    local.get $2
+    global.get $~lib/internal/arraybuffer/HEADER_SIZE
+    i32.add
+   end
+   local.set $2
+   i32.const 0
+   local.set $1
+   local.get $0
+   local.set $4
+   local.get $2
+   local.get $1
+   local.get $4
+   call $~lib/internal/memory/memset
+  end
+  local.get $5
+ )
  (func $~lib/arraybuffer/ArrayBuffer#constructor (; 6 ;) (type $iiii) (param $0 i32) (param $1 i32) (param $2 i32) (result i32)
   (local $3 i32)
   (local $4 i32)
@@ -439,7 +472,7 @@
    unreachable
   end
   local.get $1
-  call $~lib/internal/arraybuffer/allocateUnsafe
+  call $~lib/internal/arraybuffer/allocateZeroedUnsafe
   local.set $3
   local.get $2
   i32.const 0
diff --git a/tests/compiler/std/set.optimized.wat b/tests/compiler/std/set.optimized.wat
index d69e5529f9..c7ecc64b92 100644
--- a/tests/compiler/std/set.optimized.wat
+++ b/tests/compiler/std/set.optimized.wat
@@ -95,34 +95,7 @@
   global.set $~lib/allocator/arena/offset
   local.get $1
  )
- (func $~lib/internal/arraybuffer/allocateUnsafe (; 2 ;) (type $ii) (param $0 i32) (result i32)
-  (local $1 i32)
-  local.get $0
-  i32.const 1073741816
-  i32.gt_u
-  if
-   i32.const 0
-   i32.const 56
-   i32.const 26
-   i32.const 2
-   call $~lib/env/abort
-   unreachable
-  end
-  i32.const 1
-  i32.const 32
-  local.get $0
-  i32.const 7
-  i32.add
-  i32.clz
-  i32.sub
-  i32.shl
-  call $~lib/allocator/arena/__memory_allocate
-  local.tee $1
-  local.get $0
-  i32.store
-  local.get $1
- )
- (func $~lib/internal/memory/memset (; 3 ;) (type $FUNCSIG$vii) (param $0 i32) (param $1 i32)
+ (func $~lib/internal/memory/memset (; 2 ;) (type $FUNCSIG$vii) (param $0 i32) (param $1 i32)
   (local $2 i32)
   local.get $1
   i32.eqz
@@ -341,6 +314,38 @@
    end
   end
  )
+ (func $~lib/internal/arraybuffer/allocateZeroedUnsafe (; 3 ;) (type $ii) (param $0 i32) (result i32)
+  (local $1 i32)
+  local.get $0
+  i32.const 1073741816
+  i32.gt_u
+  if
+   i32.const 0
+   i32.const 56
+   i32.const 30
+   i32.const 2
+   call $~lib/env/abort
+   unreachable
+  end
+  i32.const 1
+  i32.const 32
+  local.get $0
+  i32.const 7
+  i32.add
+  i32.clz
+  i32.sub
+  i32.shl
+  call $~lib/allocator/arena/__memory_allocate
+  local.tee $1
+  local.get $0
+  i32.store
+  local.get $1
+  i32.const 8
+  i32.add
+  local.get $0
+  call $~lib/internal/memory/memset
+  local.get $1
+ )
  (func $~lib/arraybuffer/ArrayBuffer#constructor (; 4 ;) (type $FUNCSIG$iii) (param $0 i32) (param $1 i32) (result i32)
   (local $2 i32)
   local.get $0
@@ -355,7 +360,7 @@
    unreachable
   end
   local.get $0
-  call $~lib/internal/arraybuffer/allocateUnsafe
+  call $~lib/internal/arraybuffer/allocateZeroedUnsafe
   local.set $2
   local.get $1
   i32.eqz
diff --git a/tests/compiler/std/set.untouched.wat b/tests/compiler/std/set.untouched.wat
index 99180a8515..13a2217aa5 100644
--- a/tests/compiler/std/set.untouched.wat
+++ b/tests/compiler/std/set.untouched.wat
@@ -141,36 +141,7 @@
   i32.sub
   i32.shl
  )
- (func $~lib/internal/arraybuffer/allocateUnsafe (; 4 ;) (type $ii) (param $0 i32) (result i32)
-  (local $1 i32)
-  (local $2 i32)
-  local.get $0
-  global.get $~lib/internal/arraybuffer/MAX_BLENGTH
-  i32.le_u
-  i32.eqz
-  if
-   i32.const 0
-   i32.const 56
-   i32.const 26
-   i32.const 2
-   call $~lib/env/abort
-   unreachable
-  end
-  block $~lib/memory/memory.allocate|inlined.0 (result i32)
-   local.get $0
-   call $~lib/internal/arraybuffer/computeSize
-   local.set $2
-   local.get $2
-   call $~lib/allocator/arena/__memory_allocate
-   br $~lib/memory/memory.allocate|inlined.0
-  end
-  local.set $1
-  local.get $1
-  local.get $0
-  i32.store
-  local.get $1
- )
- (func $~lib/internal/memory/memset (; 5 ;) (type $iii_) (param $0 i32) (param $1 i32) (param $2 i32)
+ (func $~lib/internal/memory/memset (; 4 ;) (type $iii_) (param $0 i32) (param $1 i32) (param $2 i32)
   (local $3 i32)
   (local $4 i32)
   (local $5 i64)
@@ -424,6 +395,68 @@
    end
   end
  )
+ (func $~lib/internal/arraybuffer/allocateZeroedUnsafe (; 5 ;) (type $ii) (param $0 i32) (result i32)
+  (local $1 i32)
+  (local $2 i32)
+  (local $3 i32)
+  (local $4 i32)
+  (local $5 i32)
+  block $~lib/internal/arraybuffer/_allocateUnsafe|inlined.0 (result i32)
+   local.get $0
+   local.set $1
+   local.get $1
+   global.get $~lib/internal/arraybuffer/MAX_BLENGTH
+   i32.le_u
+   i32.eqz
+   if
+    i32.const 0
+    i32.const 56
+    i32.const 30
+    i32.const 2
+    call $~lib/env/abort
+    unreachable
+   end
+   block $~lib/memory/memory.allocate|inlined.0 (result i32)
+    local.get $1
+    call $~lib/internal/arraybuffer/computeSize
+    local.set $2
+    local.get $2
+    call $~lib/allocator/arena/__memory_allocate
+    br $~lib/memory/memory.allocate|inlined.0
+   end
+   local.set $2
+   block $~lib/internal/arraybuffer/_resize|inlined.0 (result i32)
+    local.get $2
+    local.set $3
+    local.get $1
+    local.set $4
+    local.get $3
+    local.get $4
+    i32.store
+    local.get $3
+   end
+  end
+  local.set $5
+  block $memory.fill|inlined.0
+   block $~lib/arraybuffer/ArrayBuffer#get:data|inlined.0 (result i32)
+    local.get $5
+    local.set $2
+    local.get $2
+    global.get $~lib/internal/arraybuffer/HEADER_SIZE
+    i32.add
+   end
+   local.set $2
+   i32.const 0
+   local.set $1
+   local.get $0
+   local.set $4
+   local.get $2
+   local.get $1
+   local.get $4
+   call $~lib/internal/memory/memset
+  end
+  local.get $5
+ )
  (func $~lib/arraybuffer/ArrayBuffer#constructor (; 6 ;) (type $iiii) (param $0 i32) (param $1 i32) (param $2 i32) (result i32)
   (local $3 i32)
   (local $4 i32)
@@ -441,7 +474,7 @@
    unreachable
   end
   local.get $1
-  call $~lib/internal/arraybuffer/allocateUnsafe
+  call $~lib/internal/arraybuffer/allocateZeroedUnsafe
   local.set $3
   local.get $2
   i32.const 0
diff --git a/tests/compiler/std/static-array.optimized.wat b/tests/compiler/std/static-array.optimized.wat
index 867cc68373..98c4009c53 100644
--- a/tests/compiler/std/static-array.optimized.wat
+++ b/tests/compiler/std/static-array.optimized.wat
@@ -90,34 +90,7 @@
   global.set $~lib/allocator/arena/offset
   local.get $1
  )
- (func $~lib/internal/arraybuffer/allocateUnsafe (; 2 ;) (type $ii) (param $0 i32) (result i32)
-  (local $1 i32)
-  local.get $0
-  i32.const 1073741816
-  i32.gt_u
-  if
-   i32.const 0
-   i32.const 216
-   i32.const 26
-   i32.const 2
-   call $~lib/env/abort
-   unreachable
-  end
-  i32.const 1
-  i32.const 32
-  local.get $0
-  i32.const 7
-  i32.add
-  i32.clz
-  i32.sub
-  i32.shl
-  call $~lib/allocator/arena/__memory_allocate
-  local.tee $1
-  local.get $0
-  i32.store
-  local.get $1
- )
- (func $~lib/internal/memory/memcpy (; 3 ;) (type $iii_) (param $0 i32) (param $1 i32) (param $2 i32)
+ (func $~lib/internal/memory/memcpy (; 2 ;) (type $iii_) (param $0 i32) (param $1 i32) (param $2 i32)
   (local $3 i32)
   (local $4 i32)
   (local $5 i32)
@@ -1014,7 +987,7 @@
    i32.store8
   end
  )
- (func $~lib/internal/memory/memmove (; 4 ;) (type $iii_) (param $0 i32) (param $1 i32) (param $2 i32)
+ (func $~lib/internal/memory/memmove (; 3 ;) (type $iii_) (param $0 i32) (param $1 i32) (param $2 i32)
   (local $3 i32)
   (local $4 i32)
   local.get $0
@@ -1212,7 +1185,7 @@
    end
   end
  )
- (func $~lib/internal/memory/memset (; 5 ;) (type $FUNCSIG$vii) (param $0 i32) (param $1 i32)
+ (func $~lib/internal/memory/memset (; 4 ;) (type $FUNCSIG$vii) (param $0 i32) (param $1 i32)
   (local $2 i32)
   local.get $1
   i32.eqz
@@ -1431,30 +1404,36 @@
    end
   end
  )
- (func $~lib/internal/arraybuffer/reallocateUnsafe (; 6 ;) (type $iii) (param $0 i32) (param $1 i32) (result i32)
+ (func $~lib/internal/arraybuffer/reallocateZeroedUnsafe (; 5 ;) (type $iii) (param $0 i32) (param $1 i32) (result i32)
   (local $2 i32)
   (local $3 i32)
-  local.get $1
+  (local $4 i32)
+  (local $5 i32)
   local.get $0
   i32.load
+  local.tee $4
+  local.set $3
+  local.get $1
   local.tee $2
-  i32.gt_s
+  i32.const 0
+  i32.lt_s
   if
-   local.get $1
-   i32.const 1073741816
-   i32.gt_s
-   if
-    i32.const 0
-    i32.const 216
-    i32.const 40
-    i32.const 4
-    call $~lib/env/abort
-    unreachable
-   end
-   local.get $1
+   i32.const 0
+   i32.const 216
+   i32.const 67
+   i32.const 2
+   call $~lib/env/abort
+   unreachable
+  end
+  block $~lib/internal/arraybuffer/_realocateUnsafe|inlined.0
+   local.get $2
+   local.get $3
+   i32.eq
+   br_if $~lib/internal/arraybuffer/_realocateUnsafe|inlined.0
+   local.get $2
    i32.const 1
    i32.const 32
-   local.get $2
+   local.get $3
    i32.const 7
    i32.add
    i32.clz
@@ -1465,55 +1444,82 @@
    i32.le_s
    if
     local.get $0
-    local.get $1
-    i32.store
-   else    
-    local.get $1
-    call $~lib/internal/arraybuffer/allocateUnsafe
-    local.tee $3
-    i32.const 8
-    i32.add
-    local.get $0
-    i32.const 8
-    i32.add
     local.get $2
-    call $~lib/internal/memory/memmove
-    local.get $3
-    local.set $0
+    i32.store
+    br $~lib/internal/arraybuffer/_realocateUnsafe|inlined.0
    end
    local.get $0
-   i32.const 8
-   i32.add
-   local.get $2
-   i32.add
-   local.get $1
+   local.set $5
+   local.get $3
+   local.set $0
    local.get $2
-   i32.sub
-   call $~lib/internal/memory/memset
-  else   
-   local.get $1
+   local.get $5
+   i32.load
+   i32.gt_s
+   local.tee $3
+   if (result i32)
+    local.get $2
+    i32.const 1073741816
+    i32.le_s
+   else    
+    local.get $3
+   end
+   i32.eqz
+   if
+    i32.const 0
+    i32.const 216
+    i32.const 53
+    i32.const 2
+    call $~lib/env/abort
+    unreachable
+   end
    local.get $2
-   i32.lt_s
+   local.tee $3
+   i32.const 1073741816
+   i32.gt_u
    if
-    local.get $1
     i32.const 0
-    i32.lt_s
-    if
-     i32.const 0
-     i32.const 216
-     i32.const 62
-     i32.const 4
-     call $~lib/env/abort
-     unreachable
-    end
-    local.get $0
-    local.get $1
-    i32.store
+    i32.const 216
+    i32.const 30
+    i32.const 2
+    call $~lib/env/abort
+    unreachable
    end
+   i32.const 1
+   i32.const 32
+   local.get $3
+   i32.const 7
+   i32.add
+   i32.clz
+   i32.sub
+   i32.shl
+   call $~lib/allocator/arena/__memory_allocate
+   local.tee $2
+   local.get $3
+   i32.store
+   local.get $2
+   i32.const 8
+   i32.add
+   local.get $5
+   i32.const 8
+   i32.add
+   local.get $0
+   call $~lib/internal/memory/memmove
+   local.get $2
+   local.set $0
   end
   local.get $0
+  i32.const 8
+  i32.add
+  local.get $4
+  i32.add
+  local.get $1
+  local.get $4
+  i32.sub
+  call $~lib/internal/memory/memset
+  local.get $0
  )
- (func $~lib/array/Array<i32>#__set (; 7 ;) (type $FUNCSIG$v)
+ (func $~lib/array/Array<i32>#__set (; 6 ;) (type $FUNCSIG$v)
   (local $0 i32)
   i32.const 0
   i32.const 24
@@ -1527,7 +1533,7 @@
    i32.const 24
    local.get $0
    i32.const 4
-   call $~lib/internal/arraybuffer/reallocateUnsafe
+   call $~lib/internal/arraybuffer/reallocateZeroedUnsafe
    local.tee $0
    i32.store
    i32.const 28
@@ -1538,7 +1544,7 @@
   i32.const 2
   i32.store offset=8
  )
- (func $~lib/array/Array<i64>#__set (; 8 ;) (type $FUNCSIG$v)
+ (func $~lib/array/Array<i64>#__set (; 7 ;) (type $FUNCSIG$v)
   (local $0 i32)
   i32.const 0
   i32.const 64
@@ -1552,7 +1558,7 @@
    i32.const 64
    local.get $0
    i32.const 8
-   call $~lib/internal/arraybuffer/reallocateUnsafe
+   call $~lib/internal/arraybuffer/reallocateZeroedUnsafe
    local.tee $0
    i32.store
    i32.const 68
@@ -1563,7 +1569,7 @@
   i64.const 4
   i64.store offset=8
  )
- (func $~lib/array/Array<f32>#__set (; 9 ;) (type $FUNCSIG$v)
+ (func $~lib/array/Array<f32>#__set (; 8 ;) (type $FUNCSIG$v)
   (local $0 i32)
   i32.const 0
   i32.const 88
@@ -1577,7 +1583,7 @@
    i32.const 88
    local.get $0
    i32.const 4
-   call $~lib/internal/arraybuffer/reallocateUnsafe
+   call $~lib/internal/arraybuffer/reallocateZeroedUnsafe
    local.tee $0
    i32.store
    i32.const 92
@@ -1588,7 +1594,7 @@
   f32.const 2.5
   f32.store offset=8
  )
- (func $~lib/array/Array<f64>#__set (; 10 ;) (type $FUNCSIG$v)
+ (func $~lib/array/Array<f64>#__set (; 9 ;) (type $FUNCSIG$v)
   (local $0 i32)
   i32.const 0
   i32.const 128
@@ -1602,7 +1608,7 @@
    i32.const 128
    local.get $0
    i32.const 8
-   call $~lib/internal/arraybuffer/reallocateUnsafe
+   call $~lib/internal/arraybuffer/reallocateZeroedUnsafe
    local.tee $0
    i32.store
    i32.const 132
@@ -1613,7 +1619,7 @@
   f64.const 2.25
   f64.store offset=8
  )
- (func $start (; 11 ;) (type $_)
+ (func $start (; 10 ;) (type $_)
   (local $0 i32)
   i32.const 280
   global.set $~lib/allocator/arena/startOffset
@@ -1968,7 +1974,7 @@
    unreachable
   end
  )
- (func $null (; 12 ;) (type $_)
+ (func $null (; 11 ;) (type $_)
   nop
  )
 )
diff --git a/tests/compiler/std/static-array.untouched.wat b/tests/compiler/std/static-array.untouched.wat
index e708488cbd..5d12988d15 100644
--- a/tests/compiler/std/static-array.untouched.wat
+++ b/tests/compiler/std/static-array.untouched.wat
@@ -166,36 +166,7 @@
   global.set $~lib/allocator/arena/offset
   local.get $1
  )
- (func $~lib/internal/arraybuffer/allocateUnsafe (; 4 ;) (type $ii) (param $0 i32) (result i32)
-  (local $1 i32)
-  (local $2 i32)
-  local.get $0
-  global.get $~lib/internal/arraybuffer/MAX_BLENGTH
-  i32.le_u
-  i32.eqz
-  if
-   i32.const 0
-   i32.const 216
-   i32.const 26
-   i32.const 2
-   call $~lib/env/abort
-   unreachable
-  end
-  block $~lib/memory/memory.allocate|inlined.0 (result i32)
-   local.get $0
-   call $~lib/internal/arraybuffer/computeSize
-   local.set $2
-   local.get $2
-   call $~lib/allocator/arena/__memory_allocate
-   br $~lib/memory/memory.allocate|inlined.0
-  end
-  local.set $1
-  local.get $1
-  local.get $0
-  i32.store
-  local.get $1
- )
- (func $~lib/internal/memory/memcpy (; 5 ;) (type $iii_) (param $0 i32) (param $1 i32) (param $2 i32)
+ (func $~lib/internal/memory/memcpy (; 4 ;) (type $iii_) (param $0 i32) (param $1 i32) (param $2 i32)
   (local $3 i32)
   (local $4 i32)
   (local $5 i32)
@@ -1396,7 +1367,7 @@
    i32.store8
   end
  )
- (func $~lib/internal/memory/memmove (; 6 ;) (type $iii_) (param $0 i32) (param $1 i32) (param $2 i32)
+ (func $~lib/internal/memory/memmove (; 5 ;) (type $iii_) (param $0 i32) (param $1 i32) (param $2 i32)
   (local $3 i32)
   local.get $0
   local.get $1
@@ -1623,10 +1594,10 @@
    end
   end
  )
- (func $~lib/allocator/arena/__memory_free (; 7 ;) (type $i_) (param $0 i32)
+ (func $~lib/allocator/arena/__memory_free (; 6 ;) (type $i_) (param $0 i32)
   nop
  )
- (func $~lib/internal/memory/memset (; 8 ;) (type $iii_) (param $0 i32) (param $1 i32) (param $2 i32)
+ (func $~lib/internal/memory/memset (; 7 ;) (type $iii_) (param $0 i32) (param $1 i32) (param $2 i32)
   (local $3 i32)
   (local $4 i32)
   (local $5 i64)
@@ -1880,114 +1851,190 @@
    end
   end
  )
- (func $~lib/internal/arraybuffer/reallocateUnsafe (; 9 ;) (type $iii) (param $0 i32) (param $1 i32) (result i32)
+ (func $~lib/internal/arraybuffer/reallocateZeroedUnsafe (; 8 ;) (type $iii) (param $0 i32) (param $1 i32) (result i32)
   (local $2 i32)
   (local $3 i32)
   (local $4 i32)
   (local $5 i32)
   (local $6 i32)
+  (local $7 i32)
+  (local $8 i32)
+  (local $9 i32)
+  (local $10 i32)
+  (local $11 i32)
+  (local $12 i32)
   local.get $0
   i32.load
   local.set $2
-  local.get $1
-  local.get $2
-  i32.gt_s
-  if
+  block $~lib/internal/arraybuffer/_realocateUnsafe|inlined.0 (result i32)
+   local.get $0
+   local.set $3
+   local.get $2
+   local.set $4
    local.get $1
-   global.get $~lib/internal/arraybuffer/MAX_BLENGTH
-   i32.le_s
+   local.set $5
+   local.get $5
+   i32.const 0
+   i32.ge_s
    i32.eqz
    if
     i32.const 0
     i32.const 216
-    i32.const 40
-    i32.const 4
+    i32.const 67
+    i32.const 2
     call $~lib/env/abort
     unreachable
    end
-   local.get $1
-   local.get $2
+   local.get $5
+   local.get $4
+   i32.eq
+   if
+    local.get $3
+    br $~lib/internal/arraybuffer/_realocateUnsafe|inlined.0
+   end
+   local.get $5
+   local.get $4
    call $~lib/internal/arraybuffer/computeSize
    global.get $~lib/internal/arraybuffer/HEADER_SIZE
    i32.sub
    i32.le_s
    if
-    local.get $0
-    local.get $1
-    i32.store
-   else    
-    local.get $1
-    call $~lib/internal/arraybuffer/allocateUnsafe
-    local.set $3
-    block $memory.copy|inlined.0
+    block $~lib/internal/arraybuffer/_resize|inlined.0 (result i32)
      local.get $3
-     global.get $~lib/internal/arraybuffer/HEADER_SIZE
-     i32.add
-     local.set $4
-     local.get $0
-     global.get $~lib/internal/arraybuffer/HEADER_SIZE
-     i32.add
-     local.set $5
-     local.get $2
      local.set $6
-     local.get $4
      local.get $5
+     local.set $7
      local.get $6
-     call $~lib/internal/memory/memmove
-    end
-    block $~lib/memory/memory.free|inlined.0
-     local.get $0
-     local.set $6
+     local.get $7
+     i32.store
      local.get $6
-     call $~lib/allocator/arena/__memory_free
-     br $~lib/memory/memory.free|inlined.0
     end
-    local.get $3
-    local.set $0
+    br $~lib/internal/arraybuffer/_realocateUnsafe|inlined.0
    end
-   block $memory.fill|inlined.0
-    local.get $0
-    global.get $~lib/internal/arraybuffer/HEADER_SIZE
-    i32.add
-    local.get $2
-    i32.add
-    local.set $3
-    i32.const 0
-    local.set $6
-    local.get $1
-    local.get $2
-    i32.sub
-    local.set $5
+   block $~lib/internal/arraybuffer/_growUnsafe|inlined.0 (result i32)
     local.get $3
-    local.get $6
+    local.set $7
+    local.get $4
+    local.set $6
     local.get $5
-    call $~lib/internal/memory/memset
-   end
-  else   
-   local.get $1
-   local.get $2
-   i32.lt_s
-   if
-    local.get $1
-    i32.const 0
-    i32.ge_s
+    local.set $8
+    local.get $8
+    local.get $7
+    i32.load
+    i32.gt_s
+    local.tee $9
+    if (result i32)
+     local.get $8
+     global.get $~lib/internal/arraybuffer/MAX_BLENGTH
+     i32.le_s
+    else     
+     local.get $9
+    end
     i32.eqz
     if
      i32.const 0
      i32.const 216
-     i32.const 62
-     i32.const 4
+     i32.const 53
+     i32.const 2
      call $~lib/env/abort
      unreachable
     end
+    block $~lib/internal/arraybuffer/_allocateUnsafe|inlined.0 (result i32)
+     local.get $8
+     local.set $9
+     local.get $9
+     global.get $~lib/internal/arraybuffer/MAX_BLENGTH
+     i32.le_u
+     i32.eqz
+     if
+      i32.const 0
+      i32.const 216
+      i32.const 30
+      i32.const 2
+      call $~lib/env/abort
+      unreachable
+     end
+     block $~lib/memory/memory.allocate|inlined.0 (result i32)
+      local.get $9
+      call $~lib/internal/arraybuffer/computeSize
+      local.set $10
+      local.get $10
+      call $~lib/allocator/arena/__memory_allocate
+      br $~lib/memory/memory.allocate|inlined.0
+     end
+     local.set $10
+     block $~lib/internal/arraybuffer/_resize|inlined.1 (result i32)
+      local.get $10
+      local.set $11
+      local.get $9
+      local.set $12
+      local.get $11
+      local.get $12
+      i32.store
+      local.get $11
+     end
+    end
+    local.set $10
+    block $memory.copy|inlined.0
+     block $~lib/arraybuffer/ArrayBuffer#get:data|inlined.0 (result i32)
+      local.get $10
+      local.set $9
+      local.get $9
+      global.get $~lib/internal/arraybuffer/HEADER_SIZE
+      i32.add
+     end
+     local.set $9
+     block $~lib/arraybuffer/ArrayBuffer#get:data|inlined.1 (result i32)
+      local.get $7
+      local.set $12
+      local.get $12
+      global.get $~lib/internal/arraybuffer/HEADER_SIZE
+      i32.add
+     end
+     local.set $12
+     local.get $6
+     local.set $11
+     local.get $9
+     local.get $12
+     local.get $11
+     call $~lib/internal/memory/memmove
+    end
+    block $~lib/memory/memory.free|inlined.0
+     local.get $7
+     local.set $11
+     local.get $11
+     call $~lib/allocator/arena/__memory_free
+     br $~lib/memory/memory.free|inlined.0
+    end
+    local.get $10
+   end
+  end
+  local.set $0
+  block $memory.fill|inlined.0
+   block $~lib/arraybuffer/ArrayBuffer#get:data|inlined.2 (result i32)
     local.get $0
-    local.get $1
-    i32.store
+    local.set $5
+    local.get $5
+    global.get $~lib/internal/arraybuffer/HEADER_SIZE
+    i32.add
    end
+   local.get $2
+   i32.add
+   local.set $5
+   i32.const 0
+   local.set $4
+   local.get $1
+   local.get $2
+   i32.sub
+   local.set $3
+   local.get $5
+   local.get $4
+   local.get $3
+   call $~lib/internal/memory/memset
   end
   local.get $0
  )
- (func $~lib/array/Array<i32>#__set (; 10 ;) (type $iii_) (param $0 i32) (param $1 i32) (param $2 i32)
+ (func $~lib/array/Array<i32>#__set (; 9 ;) (type $iii_) (param $0 i32) (param $1 i32) (param $2 i32)
   (local $3 i32)
   (local $4 i32)
   (local $5 i32)
@@ -2023,7 +2070,7 @@
    i32.add
    i32.const 2
    i32.shl
-   call $~lib/internal/arraybuffer/reallocateUnsafe
+   call $~lib/internal/arraybuffer/reallocateZeroedUnsafe
    local.set $3
    local.get $0
    local.get $3
@@ -2054,7 +2101,7 @@
    i32.store offset=8
   end
  )
- (func $~lib/array/Array<i64>#__get (; 11 ;) (type $iiI) (param $0 i32) (param $1 i32) (result i64)
+ (func $~lib/array/Array<i64>#__get (; 10 ;) (type $iiI) (param $0 i32) (param $1 i32) (result i64)
   (local $2 i32)
   (local $3 i32)
   (local $4 i32)
@@ -2087,7 +2134,7 @@
    unreachable
   end
  )
- (func $~lib/array/Array<i64>#__set (; 12 ;) (type $iiI_) (param $0 i32) (param $1 i32) (param $2 i64)
+ (func $~lib/array/Array<i64>#__set (; 11 ;) (type $iiI_) (param $0 i32) (param $1 i32) (param $2 i64)
   (local $3 i32)
   (local $4 i32)
   (local $5 i32)
@@ -2123,7 +2170,7 @@
    i32.add
    i32.const 3
    i32.shl
-   call $~lib/internal/arraybuffer/reallocateUnsafe
+   call $~lib/internal/arraybuffer/reallocateZeroedUnsafe
    local.set $3
    local.get $0
    local.get $3
@@ -2154,7 +2201,7 @@
    i64.store offset=8
   end
  )
- (func $~lib/array/Array<f32>#__get (; 13 ;) (type $iif) (param $0 i32) (param $1 i32) (result f32)
+ (func $~lib/array/Array<f32>#__get (; 12 ;) (type $iif) (param $0 i32) (param $1 i32) (result f32)
   (local $2 i32)
   (local $3 i32)
   (local $4 i32)
@@ -2187,7 +2234,7 @@
    unreachable
   end
  )
- (func $~lib/array/Array<f32>#__set (; 14 ;) (type $iif_) (param $0 i32) (param $1 i32) (param $2 f32)
+ (func $~lib/array/Array<f32>#__set (; 13 ;) (type $iif_) (param $0 i32) (param $1 i32) (param $2 f32)
   (local $3 i32)
   (local $4 i32)
   (local $5 i32)
@@ -2223,7 +2270,7 @@
    i32.add
    i32.const 2
    i32.shl
-   call $~lib/internal/arraybuffer/reallocateUnsafe
+   call $~lib/internal/arraybuffer/reallocateZeroedUnsafe
    local.set $3
    local.get $0
    local.get $3
@@ -2254,7 +2301,7 @@
    f32.store offset=8
   end
  )
- (func $~lib/array/Array<f64>#__get (; 15 ;) (type $iiF) (param $0 i32) (param $1 i32) (result f64)
+ (func $~lib/array/Array<f64>#__get (; 14 ;) (type $iiF) (param $0 i32) (param $1 i32) (result f64)
   (local $2 i32)
   (local $3 i32)
   (local $4 i32)
@@ -2287,7 +2334,7 @@
    unreachable
   end
  )
- (func $~lib/array/Array<f64>#__set (; 16 ;) (type $iiF_) (param $0 i32) (param $1 i32) (param $2 f64)
+ (func $~lib/array/Array<f64>#__set (; 15 ;) (type $iiF_) (param $0 i32) (param $1 i32) (param $2 f64)
   (local $3 i32)
   (local $4 i32)
   (local $5 i32)
@@ -2323,7 +2370,7 @@
    i32.add
    i32.const 3
    i32.shl
-   call $~lib/internal/arraybuffer/reallocateUnsafe
+   call $~lib/internal/arraybuffer/reallocateZeroedUnsafe
    local.set $3
    local.get $0
    local.get $3
@@ -2354,7 +2401,7 @@
    f64.store offset=8
   end
  )
- (func $start (; 17 ;) (type $_)
+ (func $start (; 16 ;) (type $_)
   (local $0 i32)
   global.get $HEAP_BASE
   global.get $~lib/internal/allocator/AL_MASK
@@ -2619,6 +2666,6 @@
    unreachable
   end
  )
- (func $null (; 18 ;) (type $_)
+ (func $null (; 17 ;) (type $_)
  )
 )
diff --git a/tests/compiler/std/string.optimized.wat b/tests/compiler/std/string.optimized.wat
index 34b0940446..1cd2d1072c 100644
--- a/tests/compiler/std/string.optimized.wat
+++ b/tests/compiler/std/string.optimized.wat
@@ -3120,34 +3120,7 @@
   local.get $2
   call $~lib/string/String#slice
  )
- (func $~lib/internal/arraybuffer/allocateUnsafe (; 35 ;) (type $ii) (param $0 i32) (result i32)
-  (local $1 i32)
-  local.get $0
-  i32.const 1073741816
-  i32.gt_u
-  if
-   i32.const 0
-   i32.const 1128
-   i32.const 26
-   i32.const 2
-   call $~lib/env/abort
-   unreachable
-  end
-  i32.const 1
-  i32.const 32
-  local.get $0
-  i32.const 7
-  i32.add
-  i32.clz
-  i32.sub
-  i32.shl
-  call $~lib/allocator/arena/__memory_allocate
-  local.tee $1
-  local.get $0
-  i32.store
-  local.get $1
- )
- (func $~lib/internal/memory/memset (; 36 ;) (type $FUNCSIG$vii) (param $0 i32) (param $1 i32)
+ (func $~lib/internal/memory/memset (; 35 ;) (type $FUNCSIG$vii) (param $0 i32) (param $1 i32)
   (local $2 i32)
   local.get $1
   i32.eqz
@@ -3366,6 +3339,38 @@
    end
   end
  )
+ (func $~lib/internal/arraybuffer/allocateZeroedUnsafe (; 36 ;) (type $ii) (param $0 i32) (result i32)
+  (local $1 i32)
+  local.get $0
+  i32.const 1073741816
+  i32.gt_u
+  if
+   i32.const 0
+   i32.const 1128
+   i32.const 30
+   i32.const 2
+   call $~lib/env/abort
+   unreachable
+  end
+  i32.const 1
+  i32.const 32
+  local.get $0
+  i32.const 7
+  i32.add
+  i32.clz
+  i32.sub
+  i32.shl
+  call $~lib/allocator/arena/__memory_allocate
+  local.tee $1
+  local.get $0
+  i32.store
+  local.get $1
+  i32.const 8
+  i32.add
+  local.get $0
+  call $~lib/internal/memory/memset
+  local.get $1
+ )
  (func $~lib/array/Array<String>#constructor (; 37 ;) (type $FUNCSIG$ii) (param $0 i32) (result i32)
   (local $1 i32)
   (local $2 i32)
@@ -3385,7 +3390,7 @@
   i32.const 2
   i32.shl
   local.tee $3
-  call $~lib/internal/arraybuffer/allocateUnsafe
+  call $~lib/internal/arraybuffer/allocateZeroedUnsafe
   local.set $2
   i32.const 8
   call $~lib/allocator/arena/__memory_allocate
@@ -3408,30 +3413,36 @@
   call $~lib/internal/memory/memset
   local.get $1
  )
- (func $~lib/internal/arraybuffer/reallocateUnsafe (; 38 ;) (type $iii) (param $0 i32) (param $1 i32) (result i32)
+ (func $~lib/internal/arraybuffer/reallocateZeroedUnsafe (; 38 ;) (type $iii) (param $0 i32) (param $1 i32) (result i32)
   (local $2 i32)
   (local $3 i32)
-  local.get $1
+  (local $4 i32)
+  (local $5 i32)
   local.get $0
   i32.load
+  local.tee $4
+  local.set $3
+  local.get $1
   local.tee $2
-  i32.gt_s
+  i32.const 0
+  i32.lt_s
   if
-   local.get $1
-   i32.const 1073741816
-   i32.gt_s
-   if
-    i32.const 0
-    i32.const 1128
-    i32.const 40
-    i32.const 4
-    call $~lib/env/abort
-    unreachable
-   end
-   local.get $1
+   i32.const 0
+   i32.const 1128
+   i32.const 67
+   i32.const 2
+   call $~lib/env/abort
+   unreachable
+  end
+  block $~lib/internal/arraybuffer/_realocateUnsafe|inlined.0
+   local.get $2
+   local.get $3
+   i32.eq
+   br_if $~lib/internal/arraybuffer/_realocateUnsafe|inlined.0
+   local.get $2
    i32.const 1
    i32.const 32
-   local.get $2
+   local.get $3
    i32.const 7
    i32.add
    i32.clz
@@ -3442,53 +3453,80 @@
    i32.le_s
    if
     local.get $0
-    local.get $1
-    i32.store
-   else    
-    local.get $1
-    call $~lib/internal/arraybuffer/allocateUnsafe
-    local.tee $3
-    i32.const 8
-    i32.add
-    local.get $0
-    i32.const 8
-    i32.add
     local.get $2
-    call $~lib/internal/memory/memmove
-    local.get $3
-    local.set $0
+    i32.store
+    br $~lib/internal/arraybuffer/_realocateUnsafe|inlined.0
    end
    local.get $0
-   i32.const 8
-   i32.add
-   local.get $2
-   i32.add
-   local.get $1
+   local.set $5
+   local.get $3
+   local.set $0
    local.get $2
-   i32.sub
-   call $~lib/internal/memory/memset
-  else   
-   local.get $1
+   local.get $5
+   i32.load
+   i32.gt_s
+   local.tee $3
+   if (result i32)
+    local.get $2
+    i32.const 1073741816
+    i32.le_s
+   else    
+    local.get $3
+   end
+   i32.eqz
+   if
+    i32.const 0
+    i32.const 1128
+    i32.const 53
+    i32.const 2
+    call $~lib/env/abort
+    unreachable
+   end
    local.get $2
-   i32.lt_s
+   local.tee $3
+   i32.const 1073741816
+   i32.gt_u
    if
-    local.get $1
     i32.const 0
-    i32.lt_s
-    if
-     i32.const 0
-     i32.const 1128
-     i32.const 62
-     i32.const 4
-     call $~lib/env/abort
-     unreachable
-    end
-    local.get $0
-    local.get $1
-    i32.store
+    i32.const 1128
+    i32.const 30
+    i32.const 2
+    call $~lib/env/abort
+    unreachable
    end
+   i32.const 1
+   i32.const 32
+   local.get $3
+   i32.const 7
+   i32.add
+   i32.clz
+   i32.sub
+   i32.shl
+   call $~lib/allocator/arena/__memory_allocate
+   local.tee $2
+   local.get $3
+   i32.store
+   local.get $2
+   i32.const 8
+   i32.add
+   local.get $5
+   i32.const 8
+   i32.add
+   local.get $0
+   call $~lib/internal/memory/memmove
+   local.get $2
+   local.set $0
   end
   local.get $0
+  i32.const 8
+  i32.add
+  local.get $4
+  i32.add
+  local.get $1
+  local.get $4
+  i32.sub
+  call $~lib/internal/memory/memset
+  local.get $0
  )
  (func $~lib/array/Array<String>#push (; 39 ;) (type $iii) (param $0 i32) (param $1 i32) (result i32)
   (local $2 i32)
@@ -3525,7 +3563,7 @@
    local.get $3
    i32.const 2
    i32.shl
-   call $~lib/internal/arraybuffer/reallocateUnsafe
+   call $~lib/internal/arraybuffer/reallocateZeroedUnsafe
    local.tee $4
    i32.store
   end
diff --git a/tests/compiler/std/string.untouched.wat b/tests/compiler/std/string.untouched.wat
index a1471e01be..94cefbcaa0 100644
--- a/tests/compiler/std/string.untouched.wat
+++ b/tests/compiler/std/string.untouched.wat
@@ -3916,41 +3916,7 @@
   i32.sub
   i32.shl
  )
- (func $~lib/internal/arraybuffer/allocateUnsafe (; 37 ;) (type $ii) (param $0 i32) (result i32)
-  (local $1 i32)
-  (local $2 i32)
-  local.get $0
-  global.get $~lib/internal/arraybuffer/MAX_BLENGTH
-  i32.le_u
-  i32.eqz
-  if
-   i32.const 0
-   i32.const 1128
-   i32.const 26
-   i32.const 2
-   call $~lib/env/abort
-   unreachable
-  end
-  block $~lib/memory/memory.allocate|inlined.1 (result i32)
-   local.get $0
-   call $~lib/internal/arraybuffer/computeSize
-   local.set $2
-   local.get $2
-   call $~lib/allocator/arena/__memory_allocate
-   br $~lib/memory/memory.allocate|inlined.1
-  end
-  local.set $1
-  local.get $1
-  local.get $0
-  i32.store
-  local.get $1
- )
- (func $~lib/memory/memory.allocate (; 38 ;) (type $ii) (param $0 i32) (result i32)
-  local.get $0
-  call $~lib/allocator/arena/__memory_allocate
-  return
- )
- (func $~lib/internal/memory/memset (; 39 ;) (type $iii_) (param $0 i32) (param $1 i32) (param $2 i32)
+ (func $~lib/internal/memory/memset (; 37 ;) (type $iii_) (param $0 i32) (param $1 i32) (param $2 i32)
   (local $3 i32)
   (local $4 i32)
   (local $5 i64)
@@ -4204,6 +4170,73 @@
    end
   end
  )
+ (func $~lib/internal/arraybuffer/allocateZeroedUnsafe (; 38 ;) (type $ii) (param $0 i32) (result i32)
+  (local $1 i32)
+  (local $2 i32)
+  (local $3 i32)
+  (local $4 i32)
+  (local $5 i32)
+  block $~lib/internal/arraybuffer/_allocateUnsafe|inlined.0 (result i32)
+   local.get $0
+   local.set $1
+   local.get $1
+   global.get $~lib/internal/arraybuffer/MAX_BLENGTH
+   i32.le_u
+   i32.eqz
+   if
+    i32.const 0
+    i32.const 1128
+    i32.const 30
+    i32.const 2
+    call $~lib/env/abort
+    unreachable
+   end
+   block $~lib/memory/memory.allocate|inlined.1 (result i32)
+    local.get $1
+    call $~lib/internal/arraybuffer/computeSize
+    local.set $2
+    local.get $2
+    call $~lib/allocator/arena/__memory_allocate
+    br $~lib/memory/memory.allocate|inlined.1
+   end
+   local.set $2
+   block $~lib/internal/arraybuffer/_resize|inlined.0 (result i32)
+    local.get $2
+    local.set $3
+    local.get $1
+    local.set $4
+    local.get $3
+    local.get $4
+    i32.store
+    local.get $3
+   end
+  end
+  local.set $5
+  block $memory.fill|inlined.0
+   block $~lib/arraybuffer/ArrayBuffer#get:data|inlined.0 (result i32)
+    local.get $5
+    local.set $2
+    local.get $2
+    global.get $~lib/internal/arraybuffer/HEADER_SIZE
+    i32.add
+   end
+   local.set $2
+   i32.const 0
+   local.set $1
+   local.get $0
+   local.set $4
+   local.get $2
+   local.get $1
+   local.get $4
+   call $~lib/internal/memory/memset
+  end
+  local.get $5
+ )
+ (func $~lib/memory/memory.allocate (; 39 ;) (type $ii) (param $0 i32) (result i32)
+  local.get $0
+  call $~lib/allocator/arena/__memory_allocate
+  return
+ )
  (func $~lib/array/Array<String>#constructor (; 40 ;) (type $iii) (param $0 i32) (param $1 i32) (result i32)
   (local $2 i32)
   (local $3 i32)
@@ -4226,7 +4259,7 @@
   i32.shl
   local.set $2
   local.get $2
-  call $~lib/internal/arraybuffer/allocateUnsafe
+  call $~lib/internal/arraybuffer/allocateZeroedUnsafe
   local.set $3
   block (result i32)
    local.get $0
@@ -4249,7 +4282,7 @@
   local.get $0
   local.get $1
   i32.store offset=4
-  block $memory.fill|inlined.0
+  block $memory.fill|inlined.1
    local.get $3
    global.get $~lib/internal/arraybuffer/HEADER_SIZE
    i32.add
@@ -4312,110 +4345,186 @@
  (func $~lib/allocator/arena/__memory_free (; 43 ;) (type $i_) (param $0 i32)
   nop
  )
- (func $~lib/internal/arraybuffer/reallocateUnsafe (; 44 ;) (type $iii) (param $0 i32) (param $1 i32) (result i32)
+ (func $~lib/internal/arraybuffer/reallocateZeroedUnsafe (; 44 ;) (type $iii) (param $0 i32) (param $1 i32) (result i32)
   (local $2 i32)
   (local $3 i32)
   (local $4 i32)
   (local $5 i32)
   (local $6 i32)
+  (local $7 i32)
+  (local $8 i32)
+  (local $9 i32)
+  (local $10 i32)
+  (local $11 i32)
+  (local $12 i32)
   local.get $0
   i32.load
   local.set $2
-  local.get $1
-  local.get $2
-  i32.gt_s
-  if
+  block $~lib/internal/arraybuffer/_realocateUnsafe|inlined.0 (result i32)
+   local.get $0
+   local.set $3
+   local.get $2
+   local.set $4
    local.get $1
-   global.get $~lib/internal/arraybuffer/MAX_BLENGTH
-   i32.le_s
+   local.set $5
+   local.get $5
+   i32.const 0
+   i32.ge_s
    i32.eqz
    if
     i32.const 0
     i32.const 1128
-    i32.const 40
-    i32.const 4
+    i32.const 67
+    i32.const 2
     call $~lib/env/abort
     unreachable
    end
-   local.get $1
-   local.get $2
+   local.get $5
+   local.get $4
+   i32.eq
+   if
+    local.get $3
+    br $~lib/internal/arraybuffer/_realocateUnsafe|inlined.0
+   end
+   local.get $5
+   local.get $4
    call $~lib/internal/arraybuffer/computeSize
    global.get $~lib/internal/arraybuffer/HEADER_SIZE
    i32.sub
    i32.le_s
    if
-    local.get $0
-    local.get $1
-    i32.store
-   else    
-    local.get $1
-    call $~lib/internal/arraybuffer/allocateUnsafe
-    local.set $3
-    block $memory.copy|inlined.2
+    block $~lib/internal/arraybuffer/_resize|inlined.1 (result i32)
      local.get $3
-     global.get $~lib/internal/arraybuffer/HEADER_SIZE
-     i32.add
-     local.set $4
-     local.get $0
-     global.get $~lib/internal/arraybuffer/HEADER_SIZE
-     i32.add
-     local.set $5
-     local.get $2
      local.set $6
-     local.get $4
      local.get $5
+     local.set $7
      local.get $6
-     call $~lib/internal/memory/memmove
-    end
-    block $~lib/memory/memory.free|inlined.0
-     local.get $0
-     local.set $6
+     local.get $7
+     i32.store
      local.get $6
-     call $~lib/allocator/arena/__memory_free
-     br $~lib/memory/memory.free|inlined.0
     end
-    local.get $3
-    local.set $0
+    br $~lib/internal/arraybuffer/_realocateUnsafe|inlined.0
    end
-   block $memory.fill|inlined.1
-    local.get $0
-    global.get $~lib/internal/arraybuffer/HEADER_SIZE
-    i32.add
-    local.get $2
-    i32.add
-    local.set $3
-    i32.const 0
-    local.set $6
-    local.get $1
-    local.get $2
-    i32.sub
-    local.set $5
+   block $~lib/internal/arraybuffer/_growUnsafe|inlined.0 (result i32)
     local.get $3
-    local.get $6
+    local.set $7
+    local.get $4
+    local.set $6
     local.get $5
-    call $~lib/internal/memory/memset
-   end
-  else   
-   local.get $1
-   local.get $2
-   i32.lt_s
-   if
-    local.get $1
-    i32.const 0
-    i32.ge_s
+    local.set $8
+    local.get $8
+    local.get $7
+    i32.load
+    i32.gt_s
+    local.tee $9
+    if (result i32)
+     local.get $8
+     global.get $~lib/internal/arraybuffer/MAX_BLENGTH
+     i32.le_s
+    else     
+     local.get $9
+    end
     i32.eqz
     if
      i32.const 0
      i32.const 1128
-     i32.const 62
-     i32.const 4
+     i32.const 53
+     i32.const 2
      call $~lib/env/abort
      unreachable
     end
+    block $~lib/internal/arraybuffer/_allocateUnsafe|inlined.1 (result i32)
+     local.get $8
+     local.set $9
+     local.get $9
+     global.get $~lib/internal/arraybuffer/MAX_BLENGTH
+     i32.le_u
+     i32.eqz
+     if
+      i32.const 0
+      i32.const 1128
+      i32.const 30
+      i32.const 2
+      call $~lib/env/abort
+      unreachable
+     end
+     block $~lib/memory/memory.allocate|inlined.2 (result i32)
+      local.get $9
+      call $~lib/internal/arraybuffer/computeSize
+      local.set $10
+      local.get $10
+      call $~lib/allocator/arena/__memory_allocate
+      br $~lib/memory/memory.allocate|inlined.2
+     end
+     local.set $10
+     block $~lib/internal/arraybuffer/_resize|inlined.2 (result i32)
+      local.get $10
+      local.set $11
+      local.get $9
+      local.set $12
+      local.get $11
+      local.get $12
+      i32.store
+      local.get $11
+     end
+    end
+    local.set $10
+    block $memory.copy|inlined.2
+     block $~lib/arraybuffer/ArrayBuffer#get:data|inlined.1 (result i32)
+      local.get $10
+      local.set $9
+      local.get $9
+      global.get $~lib/internal/arraybuffer/HEADER_SIZE
+      i32.add
+     end
+     local.set $9
+     block $~lib/arraybuffer/ArrayBuffer#get:data|inlined.2 (result i32)
+      local.get $7
+      local.set $12
+      local.get $12
+      global.get $~lib/internal/arraybuffer/HEADER_SIZE
+      i32.add
+     end
+     local.set $12
+     local.get $6
+     local.set $11
+     local.get $9
+     local.get $12
+     local.get $11
+     call $~lib/internal/memory/memmove
+    end
+    block $~lib/memory/memory.free|inlined.0
+     local.get $7
+     local.set $11
+     local.get $11
+     call $~lib/allocator/arena/__memory_free
+     br $~lib/memory/memory.free|inlined.0
+    end
+    local.get $10
+   end
+  end
+  local.set $0
+  block $memory.fill|inlined.2
+   block $~lib/arraybuffer/ArrayBuffer#get:data|inlined.3 (result i32)
     local.get $0
-    local.get $1
-    i32.store
+    local.set $5
+    local.get $5
+    global.get $~lib/internal/arraybuffer/HEADER_SIZE
+    i32.add
    end
+   local.get $2
+   i32.add
+   local.set $5
+   i32.const 0
+   local.set $4
+   local.get $1
+   local.get $2
+   i32.sub
+   local.set $3
+   local.get $5
+   local.get $4
+   local.get $3
+   call $~lib/internal/memory/memset
   end
   local.get $0
  )
@@ -4462,7 +4571,7 @@
    local.get $5
    i32.const 2
    i32.shl
-   call $~lib/internal/arraybuffer/reallocateUnsafe
+   call $~lib/internal/arraybuffer/reallocateZeroedUnsafe
    local.set $3
    local.get $0
    local.get $3
diff --git a/tests/compiler/std/symbol.optimized.wat b/tests/compiler/std/symbol.optimized.wat
index b3e163e836..3bbb9b98b0 100644
--- a/tests/compiler/std/symbol.optimized.wat
+++ b/tests/compiler/std/symbol.optimized.wat
@@ -120,34 +120,7 @@
   global.set $~lib/allocator/arena/offset
   local.get $1
  )
- (func $~lib/internal/arraybuffer/allocateUnsafe (; 2 ;) (type $ii) (param $0 i32) (result i32)
-  (local $1 i32)
-  local.get $0
-  i32.const 1073741816
-  i32.gt_u
-  if
-   i32.const 0
-   i32.const 104
-   i32.const 26
-   i32.const 2
-   call $~lib/env/abort
-   unreachable
-  end
-  i32.const 1
-  i32.const 32
-  local.get $0
-  i32.const 7
-  i32.add
-  i32.clz
-  i32.sub
-  i32.shl
-  call $~lib/allocator/arena/__memory_allocate
-  local.tee $1
-  local.get $0
-  i32.store
-  local.get $1
- )
- (func $~lib/internal/memory/memset (; 3 ;) (type $FUNCSIG$vii) (param $0 i32) (param $1 i32)
+ (func $~lib/internal/memory/memset (; 2 ;) (type $FUNCSIG$vii) (param $0 i32) (param $1 i32)
   (local $2 i32)
   local.get $1
   i32.eqz
@@ -366,6 +339,38 @@
    end
   end
  )
+ (func $~lib/internal/arraybuffer/allocateZeroedUnsafe (; 3 ;) (type $ii) (param $0 i32) (result i32)
+  (local $1 i32)
+  local.get $0
+  i32.const 1073741816
+  i32.gt_u
+  if
+   i32.const 0
+   i32.const 104
+   i32.const 30
+   i32.const 2
+   call $~lib/env/abort
+   unreachable
+  end
+  i32.const 1
+  i32.const 32
+  local.get $0
+  i32.const 7
+  i32.add
+  i32.clz
+  i32.sub
+  i32.shl
+  call $~lib/allocator/arena/__memory_allocate
+  local.tee $1
+  local.get $0
+  i32.store
+  local.get $1
+  i32.const 8
+  i32.add
+  local.get $0
+  call $~lib/internal/memory/memset
+  local.get $1
+ )
  (func $~lib/arraybuffer/ArrayBuffer#constructor (; 4 ;) (type $FUNCSIG$iii) (param $0 i32) (param $1 i32) (result i32)
   (local $2 i32)
   local.get $0
@@ -380,7 +385,7 @@
    unreachable
   end
   local.get $0
-  call $~lib/internal/arraybuffer/allocateUnsafe
+  call $~lib/internal/arraybuffer/allocateZeroedUnsafe
   local.set $2
   local.get $1
   i32.eqz
diff --git a/tests/compiler/std/symbol.untouched.wat b/tests/compiler/std/symbol.untouched.wat
index c705bc7d68..bf9cda1910 100644
--- a/tests/compiler/std/symbol.untouched.wat
+++ b/tests/compiler/std/symbol.untouched.wat
@@ -189,36 +189,7 @@
   i32.sub
   i32.shl
  )
- (func $~lib/internal/arraybuffer/allocateUnsafe (; 5 ;) (type $ii) (param $0 i32) (result i32)
-  (local $1 i32)
-  (local $2 i32)
-  local.get $0
-  global.get $~lib/internal/arraybuffer/MAX_BLENGTH
-  i32.le_u
-  i32.eqz
-  if
-   i32.const 0
-   i32.const 104
-   i32.const 26
-   i32.const 2
-   call $~lib/env/abort
-   unreachable
-  end
-  block $~lib/memory/memory.allocate|inlined.0 (result i32)
-   local.get $0
-   call $~lib/internal/arraybuffer/computeSize
-   local.set $2
-   local.get $2
-   call $~lib/allocator/arena/__memory_allocate
-   br $~lib/memory/memory.allocate|inlined.0
-  end
-  local.set $1
-  local.get $1
-  local.get $0
-  i32.store
-  local.get $1
- )
- (func $~lib/internal/memory/memset (; 6 ;) (type $iii_) (param $0 i32) (param $1 i32) (param $2 i32)
+ (func $~lib/internal/memory/memset (; 5 ;) (type $iii_) (param $0 i32) (param $1 i32) (param $2 i32)
   (local $3 i32)
   (local $4 i32)
   (local $5 i64)
@@ -472,6 +443,68 @@
    end
   end
  )
+ (func $~lib/internal/arraybuffer/allocateZeroedUnsafe (; 6 ;) (type $ii) (param $0 i32) (result i32)
+  (local $1 i32)
+  (local $2 i32)
+  (local $3 i32)
+  (local $4 i32)
+  (local $5 i32)
+  block $~lib/internal/arraybuffer/_allocateUnsafe|inlined.0 (result i32)
+   local.get $0
+   local.set $1
+   local.get $1
+   global.get $~lib/internal/arraybuffer/MAX_BLENGTH
+   i32.le_u
+   i32.eqz
+   if
+    i32.const 0
+    i32.const 104
+    i32.const 30
+    i32.const 2
+    call $~lib/env/abort
+    unreachable
+   end
+   block $~lib/memory/memory.allocate|inlined.0 (result i32)
+    local.get $1
+    call $~lib/internal/arraybuffer/computeSize
+    local.set $2
+    local.get $2
+    call $~lib/allocator/arena/__memory_allocate
+    br $~lib/memory/memory.allocate|inlined.0
+   end
+   local.set $2
+   block $~lib/internal/arraybuffer/_resize|inlined.0 (result i32)
+    local.get $2
+    local.set $3
+    local.get $1
+    local.set $4
+    local.get $3
+    local.get $4
+    i32.store
+    local.get $3
+   end
+  end
+  local.set $5
+  block $memory.fill|inlined.0
+   block $~lib/arraybuffer/ArrayBuffer#get:data|inlined.0 (result i32)
+    local.get $5
+    local.set $2
+    local.get $2
+    global.get $~lib/internal/arraybuffer/HEADER_SIZE
+    i32.add
+   end
+   local.set $2
+   i32.const 0
+   local.set $1
+   local.get $0
+   local.set $4
+   local.get $2
+   local.get $1
+   local.get $4
+   call $~lib/internal/memory/memset
+  end
+  local.get $5
+ )
  (func $~lib/arraybuffer/ArrayBuffer#constructor (; 7 ;) (type $iiii) (param $0 i32) (param $1 i32) (param $2 i32) (result i32)
   (local $3 i32)
   (local $4 i32)
@@ -489,7 +522,7 @@
    unreachable
   end
   local.get $1
-  call $~lib/internal/arraybuffer/allocateUnsafe
+  call $~lib/internal/arraybuffer/allocateZeroedUnsafe
   local.set $3
   local.get $2
   i32.const 0
diff --git a/tests/compiler/std/typedarray.optimized.wat b/tests/compiler/std/typedarray.optimized.wat
index 53175de155..df16e9698c 100644
--- a/tests/compiler/std/typedarray.optimized.wat
+++ b/tests/compiler/std/typedarray.optimized.wat
@@ -146,34 +146,7 @@
   global.set $~lib/allocator/arena/offset
   local.get $1
  )
- (func $~lib/internal/arraybuffer/allocateUnsafe (; 2 ;) (type $ii) (param $0 i32) (result i32)
-  (local $1 i32)
-  local.get $0
-  i32.const 1073741816
-  i32.gt_u
-  if
-   i32.const 0
-   i32.const 112
-   i32.const 26
-   i32.const 2
-   call $~lib/env/abort
-   unreachable
-  end
-  i32.const 1
-  i32.const 32
-  local.get $0
-  i32.const 7
-  i32.add
-  i32.clz
-  i32.sub
-  i32.shl
-  call $~lib/allocator/arena/__memory_allocate
-  local.tee $1
-  local.get $0
-  i32.store
-  local.get $1
- )
- (func $~lib/internal/memory/memset (; 3 ;) (type $iii_) (param $0 i32) (param $1 i32) (param $2 i32)
+ (func $~lib/internal/memory/memset (; 2 ;) (type $iii_) (param $0 i32) (param $1 i32) (param $2 i32)
   (local $3 i32)
   (local $4 i64)
   local.get $2
@@ -408,6 +381,39 @@
    end
   end
  )
+ (func $~lib/internal/arraybuffer/allocateZeroedUnsafe (; 3 ;) (type $ii) (param $0 i32) (result i32)
+  (local $1 i32)
+  local.get $0
+  i32.const 1073741816
+  i32.gt_u
+  if
+   i32.const 0
+   i32.const 112
+   i32.const 30
+   i32.const 2
+   call $~lib/env/abort
+   unreachable
+  end
+  i32.const 1
+  i32.const 32
+  local.get $0
+  i32.const 7
+  i32.add
+  i32.clz
+  i32.sub
+  i32.shl
+  call $~lib/allocator/arena/__memory_allocate
+  local.tee $1
+  local.get $0
+  i32.store
+  local.get $1
+  i32.const 8
+  i32.add
+  i32.const 0
+  local.get $0
+  call $~lib/internal/memory/memset
+  local.get $1
+ )
  (func $~lib/internal/typedarray/TypedArray<i8>#constructor (; 4 ;) (type $iii) (param $0 i32) (param $1 i32) (result i32)
   (local $2 i32)
   local.get $1
@@ -422,7 +428,7 @@
    unreachable
   end
   local.get $1
-  call $~lib/internal/arraybuffer/allocateUnsafe
+  call $~lib/internal/arraybuffer/allocateZeroedUnsafe
   local.tee $2
   i32.const 8
   i32.add
@@ -490,7 +496,7 @@
   i32.const 1
   i32.shl
   local.tee $1
-  call $~lib/internal/arraybuffer/allocateUnsafe
+  call $~lib/internal/arraybuffer/allocateZeroedUnsafe
   local.tee $2
   i32.const 8
   i32.add
@@ -547,7 +553,7 @@
   i32.const 2
   i32.shl
   local.tee $1
-  call $~lib/internal/arraybuffer/allocateUnsafe
+  call $~lib/internal/arraybuffer/allocateZeroedUnsafe
   local.tee $2
   i32.const 8
   i32.add
@@ -604,7 +610,7 @@
   i32.const 3
   i32.shl
   local.tee $1
-  call $~lib/internal/arraybuffer/allocateUnsafe
+  call $~lib/internal/arraybuffer/allocateZeroedUnsafe
   local.tee $2
   i32.const 8
   i32.add
diff --git a/tests/compiler/std/typedarray.untouched.wat b/tests/compiler/std/typedarray.untouched.wat
index 6d1d0c2685..437f40ade6 100644
--- a/tests/compiler/std/typedarray.untouched.wat
+++ b/tests/compiler/std/typedarray.untouched.wat
@@ -191,36 +191,7 @@
   global.set $~lib/allocator/arena/offset
   local.get $1
  )
- (func $~lib/internal/arraybuffer/allocateUnsafe (; 3 ;) (type $ii) (param $0 i32) (result i32)
-  (local $1 i32)
-  (local $2 i32)
-  local.get $0
-  global.get $~lib/internal/arraybuffer/MAX_BLENGTH
-  i32.le_u
-  i32.eqz
-  if
-   i32.const 0
-   i32.const 112
-   i32.const 26
-   i32.const 2
-   call $~lib/env/abort
-   unreachable
-  end
-  block $~lib/memory/memory.allocate|inlined.0 (result i32)
-   local.get $0
-   call $~lib/internal/arraybuffer/computeSize
-   local.set $2
-   local.get $2
-   call $~lib/allocator/arena/__memory_allocate
-   br $~lib/memory/memory.allocate|inlined.0
-  end
-  local.set $1
-  local.get $1
-  local.get $0
-  i32.store
-  local.get $1
- )
- (func $~lib/internal/memory/memset (; 4 ;) (type $iii_) (param $0 i32) (param $1 i32) (param $2 i32)
+ (func $~lib/internal/memory/memset (; 3 ;) (type $iii_) (param $0 i32) (param $1 i32) (param $2 i32)
   (local $3 i32)
   (local $4 i32)
   (local $5 i64)
@@ -474,6 +445,68 @@
    end
   end
  )
+ (func $~lib/internal/arraybuffer/allocateZeroedUnsafe (; 4 ;) (type $ii) (param $0 i32) (result i32)
+  (local $1 i32)
+  (local $2 i32)
+  (local $3 i32)
+  (local $4 i32)
+  (local $5 i32)
+  block $~lib/internal/arraybuffer/_allocateUnsafe|inlined.0 (result i32)
+   local.get $0
+   local.set $1
+   local.get $1
+   global.get $~lib/internal/arraybuffer/MAX_BLENGTH
+   i32.le_u
+   i32.eqz
+   if
+    i32.const 0
+    i32.const 112
+    i32.const 30
+    i32.const 2
+    call $~lib/env/abort
+    unreachable
+   end
+   block $~lib/memory/memory.allocate|inlined.0 (result i32)
+    local.get $1
+    call $~lib/internal/arraybuffer/computeSize
+    local.set $2
+    local.get $2
+    call $~lib/allocator/arena/__memory_allocate
+    br $~lib/memory/memory.allocate|inlined.0
+   end
+   local.set $2
+   block $~lib/internal/arraybuffer/_resize|inlined.0 (result i32)
+    local.get $2
+    local.set $3
+    local.get $1
+    local.set $4
+    local.get $3
+    local.get $4
+    i32.store
+    local.get $3
+   end
+  end
+  local.set $5
+  block $memory.fill|inlined.0
+   block $~lib/arraybuffer/ArrayBuffer#get:data|inlined.0 (result i32)
+    local.get $5
+    local.set $2
+    local.get $2
+    global.get $~lib/internal/arraybuffer/HEADER_SIZE
+    i32.add
+   end
+   local.set $2
+   i32.const 0
+   local.set $1
+   local.get $0
+   local.set $4
+   local.get $2
+   local.get $1
+   local.get $4
+   call $~lib/internal/memory/memset
+  end
+  local.get $5
+ )
  (func $~lib/memory/memory.allocate (; 5 ;) (type $ii) (param $0 i32) (result i32)
   local.get $0
   call $~lib/allocator/arena/__memory_allocate
@@ -501,9 +534,9 @@
   i32.shl
   local.set $2
   local.get $2
-  call $~lib/internal/arraybuffer/allocateUnsafe
+  call $~lib/internal/arraybuffer/allocateZeroedUnsafe
   local.set $3
-  block $memory.fill|inlined.0
+  block $memory.fill|inlined.1
    local.get $3
    global.get $~lib/internal/arraybuffer/HEADER_SIZE
    i32.add
@@ -582,9 +615,9 @@
   i32.shl
   local.set $2
   local.get $2
-  call $~lib/internal/arraybuffer/allocateUnsafe
+  call $~lib/internal/arraybuffer/allocateZeroedUnsafe
   local.set $3
-  block $memory.fill|inlined.1
+  block $memory.fill|inlined.2
    local.get $3
    global.get $~lib/internal/arraybuffer/HEADER_SIZE
    i32.add
@@ -677,9 +710,9 @@
   i32.shl
   local.set $2
   local.get $2
-  call $~lib/internal/arraybuffer/allocateUnsafe
+  call $~lib/internal/arraybuffer/allocateZeroedUnsafe
   local.set $3
-  block $memory.fill|inlined.2
+  block $memory.fill|inlined.3
    local.get $3
    global.get $~lib/internal/arraybuffer/HEADER_SIZE
    i32.add
@@ -758,9 +791,9 @@
   i32.shl
   local.set $2
   local.get $2
-  call $~lib/internal/arraybuffer/allocateUnsafe
+  call $~lib/internal/arraybuffer/allocateZeroedUnsafe
   local.set $3
-  block $memory.fill|inlined.3
+  block $memory.fill|inlined.4
    local.get $3
    global.get $~lib/internal/arraybuffer/HEADER_SIZE
    i32.add
@@ -839,9 +872,9 @@
   i32.shl
   local.set $2
   local.get $2
-  call $~lib/internal/arraybuffer/allocateUnsafe
+  call $~lib/internal/arraybuffer/allocateZeroedUnsafe
   local.set $3
-  block $memory.fill|inlined.4
+  block $memory.fill|inlined.5
    local.get $3
    global.get $~lib/internal/arraybuffer/HEADER_SIZE
    i32.add
@@ -920,9 +953,9 @@
   i32.shl
   local.set $2
   local.get $2
-  call $~lib/internal/arraybuffer/allocateUnsafe
+  call $~lib/internal/arraybuffer/allocateZeroedUnsafe
   local.set $3
-  block $memory.fill|inlined.5
+  block $memory.fill|inlined.6
    local.get $3
    global.get $~lib/internal/arraybuffer/HEADER_SIZE
    i32.add
@@ -1001,9 +1034,9 @@
   i32.shl
   local.set $2
   local.get $2
-  call $~lib/internal/arraybuffer/allocateUnsafe
+  call $~lib/internal/arraybuffer/allocateZeroedUnsafe
   local.set $3
-  block $memory.fill|inlined.6
+  block $memory.fill|inlined.7
    local.get $3
    global.get $~lib/internal/arraybuffer/HEADER_SIZE
    i32.add
@@ -1082,9 +1115,9 @@
   i32.shl
   local.set $2
   local.get $2
-  call $~lib/internal/arraybuffer/allocateUnsafe
+  call $~lib/internal/arraybuffer/allocateZeroedUnsafe
   local.set $3
-  block $memory.fill|inlined.7
+  block $memory.fill|inlined.8
    local.get $3
    global.get $~lib/internal/arraybuffer/HEADER_SIZE
    i32.add
@@ -1163,9 +1196,9 @@
   i32.shl
   local.set $2
   local.get $2
-  call $~lib/internal/arraybuffer/allocateUnsafe
+  call $~lib/internal/arraybuffer/allocateZeroedUnsafe
   local.set $3
-  block $memory.fill|inlined.8
+  block $memory.fill|inlined.9
    local.get $3
    global.get $~lib/internal/arraybuffer/HEADER_SIZE
    i32.add
@@ -1244,9 +1277,9 @@
   i32.shl
   local.set $2
   local.get $2
-  call $~lib/internal/arraybuffer/allocateUnsafe
+  call $~lib/internal/arraybuffer/allocateZeroedUnsafe
   local.set $3
-  block $memory.fill|inlined.9
+  block $memory.fill|inlined.10
    local.get $3
    global.get $~lib/internal/arraybuffer/HEADER_SIZE
    i32.add
@@ -2390,7 +2423,7 @@
    br $~lib/memory/memory.allocate|inlined.3
   end
   local.set $6
-  block $memory.fill|inlined.10
+  block $memory.fill|inlined.11
    local.get $6
    local.set $5
    i32.const 0