diff --git a/.gitignore b/.gitignore
index 361d91e..558c6dc 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,5 @@
+
+cmake-build/
 # Mac
 .DS_Store
 #ignore thumbnails created by windows
diff --git a/src/Binary/binarySerializer.cpp b/src/Binary/binarySerializer.cpp
index dfad58b..32e1d24 100644
--- a/src/Binary/binarySerializer.cpp
+++ b/src/Binary/binarySerializer.cpp
@@ -139,10 +139,26 @@ void binary::BinarySerializer::serializeMethod(::Meta::MethodMeta* meta, binary:
     if (meta->getFlags(::Meta::MetaFlags::MethodIsInitializer))
         binaryMetaStruct._flags |= BinaryFlags::MethodIsInitializer;
 
-    binaryMetaStruct._encoding = this->typeEncodingSerializer.visit(meta->signature);
+    binaryMetaStruct._encoding = this->getOffset(meta->signature, meta->getFFISignature());
     binaryMetaStruct._constructorTokens = this->heapWriter.push_string(meta->constructorTokens);
 }
 
+binary::MetaFileOffset binary::BinarySerializer::getOffset(std::vector<::Meta::Type*> signature, std::vector<::Meta::FFIType> ffiSignature) {
+    
+    static int invocations = 0;
+    std::unordered_map<std::vector<::Meta::FFIType>, MetaFileOffset, SignatureHash, SignatureEq>::const_iterator it = signatureCache.find(ffiSignature);
+    
+    if (it == signatureCache.end()) {
+        invocations += 1;
+        signatureCache[ffiSignature] = this->typeEncodingSerializer.visit(signature);
+    }
+
+    printf("%d\n", invocations);
+    
+    return signatureCache[ffiSignature];
+    
+}
+
 void binary::BinarySerializer::serializeProperty(::Meta::PropertyMeta* meta, binary::PropertyMeta& binaryMetaStruct)
 {
 
@@ -318,7 +334,8 @@ void binary::BinarySerializer::visit(::Meta::FunctionMeta* meta)
     if (meta->getFlags(::Meta::MetaFlags::FunctionReturnsUnmanaged))
         binaryStruct._flags |= BinaryFlags::FunctionReturnsUnmanaged;
 
-    binaryStruct._encoding = this->typeEncodingSerializer.visit(meta->signature);
+    binaryStruct._encoding = this->getOffset(meta->signature, meta->getFFISignature());;
+    
     this->file->registerInGlobalTable(meta->jsName, binaryStruct.save(this->heapWriter));
 }
 
diff --git a/src/Binary/binarySerializer.h b/src/Binary/binarySerializer.h
index c4de320..7d5aeb9 100644
--- a/src/Binary/binarySerializer.h
+++ b/src/Binary/binarySerializer.h
@@ -6,6 +6,47 @@
 #include <map>
 
 namespace binary {
+    
+struct CachedSignature {
+    
+    MetaFileOffset offset;
+    std::vector<::Meta::FFIType> types;
+    
+};
+    
+struct SignatureHash {
+    
+    std::size_t operator()(std::vector<::Meta::FFIType> signature) const {
+        std::size_t seed = 0;
+        for(size_t i = 0; i < signature.size(); i++) {
+            seed <<= 4;
+            seed |= signature[i];
+        }
+        return seed;
+    }
+    
+};
+    
+struct SignatureEq {
+    
+    bool operator() (const std::vector<::Meta::FFIType>& l, const std::vector<::Meta::FFIType>& r) const {
+        if (l.size() != r.size()) {
+            return false;
+        } else {
+            for (size_t i = 0; i < l.size(); i++) {
+                
+                if (l[i] != r[i]) {
+                    return false;
+                }
+                    
+            }
+        }
+        return true;
+    }
+    
+};
+    
+    
 /*
      * \class BinarySerializer
      * \brief Applies the Visitor pattern for serializing \c Meta::Meta objects in binary format.
@@ -15,6 +56,11 @@ class BinarySerializer : public ::Meta::MetaVisitor {
     MetaFile* file;
     BinaryWriter heapWriter;
     BinaryTypeEncodingSerializer typeEncodingSerializer;
+    
+    std::vector<CachedSignature> cachedSignatures;
+    std::unordered_map<std::vector<::Meta::FFIType>, MetaFileOffset, SignatureHash, SignatureEq>signatureCache;
+
+    binary::MetaFileOffset getOffset(std::vector<::Meta::Type*> signature, std::vector<::Meta::FFIType> ffiSignature);
 
     void serializeBase(::Meta::Meta* Meta, binary::Meta& binaryMetaStruct);
 
@@ -66,4 +112,4 @@ class BinarySerializer : public ::Meta::MetaVisitor {
 
     virtual void visit(::Meta::MethodMeta* Meta) override;
 };
-}
\ No newline at end of file
+}
diff --git a/src/Meta/MetaEntities.cpp b/src/Meta/MetaEntities.cpp
index 70b0804..ed600cb 100644
--- a/src/Meta/MetaEntities.cpp
+++ b/src/Meta/MetaEntities.cpp
@@ -24,6 +24,17 @@ void Meta::MethodMeta::visit(MetaVisitor* visitor)
     visitor->visit(this);
 }
 
+std::vector<Meta::FFIType> Meta::MethodMeta::getFFISignature()
+{
+    std::vector<FFIType> types;
+    
+    for (size_t i = 0; i < this->signature.size(); i++) {
+        types.push_back(signature[i]->toFFIType());
+    }
+    
+    return types;
+}
+
 void Meta::PropertyMeta::visit(MetaVisitor* visitor)
 {
     visitor->visit(this);
@@ -67,6 +78,17 @@ void Meta::FunctionMeta::visit(MetaVisitor* visitor)
     visitor->visit(this);
 }
 
+std::vector<Meta::FFIType> Meta::FunctionMeta::getFFISignature()
+{
+    std::vector<FFIType> types;
+    
+    for (size_t i = 0; i < this->signature.size(); i++) {
+        types.push_back(signature[i]->toFFIType());
+    }
+    
+    return types;
+}
+
 void Meta::EnumMeta::visit(MetaVisitor* visitor)
 {
     visitor->visit(this);
@@ -75,4 +97,4 @@ void Meta::EnumMeta::visit(MetaVisitor* visitor)
 void Meta::VarMeta::visit(MetaVisitor* visitor)
 {
     visitor->visit(this);
-}
\ No newline at end of file
+}
diff --git a/src/Meta/MetaEntities.h b/src/Meta/MetaEntities.h
index 49a17f0..66847cf 100644
--- a/src/Meta/MetaEntities.h
+++ b/src/Meta/MetaEntities.h
@@ -134,6 +134,8 @@ class MethodMeta : public Meta {
     std::string constructorTokens;
 
     virtual void visit(MetaVisitor* visitor) override;
+    
+    std::vector<FFIType>getFFISignature();
 };
 
 class PropertyMeta : public Meta {
@@ -227,6 +229,8 @@ class FunctionMeta : public Meta {
     std::vector<Type*> signature;
 
     virtual void visit(MetaVisitor* visitor) override;
+    
+    std::vector<FFIType>getFFISignature();
 };
 
 class EnumConstantMeta : public Meta {
@@ -275,4 +279,4 @@ class VarMeta : public Meta {
 
     virtual void visit(MetaVisitor* visitor) override;
 };
-}
\ No newline at end of file
+}
diff --git a/src/Meta/MetaFactory.cpp b/src/Meta/MetaFactory.cpp
index 216bb0c..05330d9 100644
--- a/src/Meta/MetaFactory.cpp
+++ b/src/Meta/MetaFactory.cpp
@@ -601,4 +601,4 @@ Version MetaFactory::convertVersion(clang::VersionTuple clangVersion)
     };
     return result;
 }
-}
\ No newline at end of file
+}
diff --git a/src/Meta/TypeEntities.h b/src/Meta/TypeEntities.h
index 0c591eb..0572b68 100644
--- a/src/Meta/TypeEntities.h
+++ b/src/Meta/TypeEntities.h
@@ -11,6 +11,24 @@ class InterfaceMeta;
 class StructMeta;
 class UnionMeta;
 class EnumMeta;
+    
+    enum FFIType : uint8_t {
+        FFIVoid,
+        FFIPointer,
+        FFISint8,
+        FFIUint8,
+        FFIUint16,
+        FFISint16,
+        FFIUint32,
+        FFISint32,
+        FFIUint64,
+        FFISint64,
+        FFIUshort,
+        FFIDouble,
+        FFIStruct,
+        FFIFloat
+    };
+    
 
 enum TypeType {
     TypeVoid,
@@ -157,6 +175,48 @@ class Type {
             return visitor.visitTypeArgument(as<TypeArgumentType>());
         }
     }
+    
+    FFIType toFFIType() const {
+
+        switch (this->type) {
+            case TypeBool:
+                return FFIUint8;
+            case TypeULongLong:
+                return FFIUint64;
+            case TypeStruct:
+                return FFIStruct;
+            case TypeUnsignedChar:
+                return FFIUshort;
+            case TypeSignedChar:
+                return FFIUshort;
+            case TypeUnichar:
+                return FFIUshort;
+            case TypeUShort:
+                return FFIUint16;
+            case TypeShort:
+                return FFISint16;
+            case TypeDouble:
+                return FFIDouble;
+            case TypeFloat:
+                return FFIFloat;
+            case TypeLongLong:
+                return FFISint64;
+            case TypeULong:
+                return FFIUint32;
+            case TypeLong:
+                return FFISint32;
+            case TypeUInt:
+                return FFIUint32;
+            case TypeInt:
+                return FFISint32;
+            case TypeVoid:
+                return FFIVoid;
+            case TypeUnion:
+                return FFIStruct;
+            default:
+                return FFIPointer;
+        }
+    }
 
 protected:
     TypeType type;