Make the benchmark more useful.

Author: Kenneth Endfinger

example/binary_benchmark.dart

@@ -4,7 +4,7 @@ import "dart:typed_data";
 import "dart:math";
 
 main() {
-  var byteList = new Uint8List(1024 * 1024 * 5);
+  var byteList = new Uint8List(1024 * 1024 * 50);
   var random = new Random();
   for (var i = 0; i < byteList.lengthInBytes; i++) {
     byteList[i] = random.nextInt(255);
@@ -35,14 +35,40 @@ main() {
     unpack(encoded);
   }
 
+  var watch = new Stopwatch();
+  watch.start();
+  var times = <List<int>>[];
+  for (var i = 1; i <= 5; i++) {
+    times.add(go(input));
+  }
+  watch.stop();
+
+  var totalEncodeTime = 0;
+  var totalDecodeTime = 0;
+  for (var time in times) {
+    totalEncodeTime += time[0];
+    totalDecodeTime += time[1];
+  }
+  var avgEncodeTime = totalEncodeTime / times.length;
+  var avgDecodeTime = totalDecodeTime / times.length;
+
+  print("Took an average of ${(avgEncodeTime / 1000).toStringAsFixed(2)}ms to encode.");
+  print("Took an average of ${(avgDecodeTime / 1000).toStringAsFixed(2)}ms to decode.");
+}
+
+List<int> go(input) {
+  var out = <int>[];
   var watch = new Stopwatch();
   watch.start();
   var encoded = pack(input);
   watch.stop();
   print("Took ${watch.elapsedMicroseconds / 1000}ms to encode.");
+  out.add(watch.elapsedMicroseconds);
   watch.reset();
   watch.start();
   var decoded = unpack(encoded);
   watch.stop();
   print("Took ${watch.elapsedMicroseconds / 1000}ms to decode.");
+  out.add(watch.elapsedMicroseconds);
+  return out;
 }

lib/src/stateful_packer.dart

@@ -12,7 +12,7 @@ abstract class PackBuffer {
 class MsgPackBuffer implements PackBuffer {
   static const int defaultBufferSize = const int.fromEnvironment(
     "msgpack.packer.defaultBufferSize",
-    defaultValue: 256
+    defaultValue: 512
   );
 
   List<Uint8List> _buffers = <Uint8List>[];
@@ -111,11 +111,11 @@ class MsgPackBuffer implements PackBuffer {
   @override
   Uint8List done() {
     Uint8List out = read();
-    _buffers.length = 0;
-    _buffer = null;
+    _buffers = new List<Uint8List>();
     _len = 0;
     _totalLength = 0;
     _offset = 0;
+    _buffer = null;
     return out;
   }