如何比较messagepack-cli和json.net反序列化器的性能

我试图比较Unity3d中两种不同的反序列化方法的性能，这是基于MonoDevelop对c#/.NET的实现

方法A)使用MsgPack-CLI

方法B)使用NewtonSoft的Json。净

基于这篇博文，我的印象是Messagepack在读取和写入方面都会更快。然而，我发现虽然写性能明显更好，但读性能明显变慢。

为了测试反序列化性能，我在这段代码中做错了什么吗?

public void test_msgpack(int _num, Test_Class _obj)
{
    var serializer = MessagePackSerializer.Get< Test_Class >();
    var stream = new MemoryStream();
    serializer.Pack(stream, _obj);
    Stopwatch stopWatch = new Stopwatch ();
    stopWatch.Start ();
    while (_num > 0) {
        _num -= 1;
        stream.Position = 0;
        Test_Class deserializedObject = serializer.Unpack( stream );
    }
    stopWatch.Stop ();
    TimeSpan ts = stopWatch.Elapsed;
    string elapsedTime = String.Format ("{0:00}:{1:00}:{2:00}.{3:00}",
        ts.Hours, ts.Minutes, ts.Seconds, ts.Milliseconds / 10);
    print ("msgpack read: " + elapsedTime);
}
public void test_json(int _num, Test_Class _obj)
{
    var serializer = new JsonSerializer();
    var stream = new MemoryStream();
    var sw = new StreamWriter(stream);
    var JsonTextWriter = new JsonTextWriter(sw);
    var sr = new StreamReader(stream);
    var JsonTextReader = new JsonTextReader(sr);
    serializer.Serialize(JsonTextWriter, _obj);
    Stopwatch stopWatch = new Stopwatch ();
    stopWatch.Start ();
    while (_num > 0) {
        _num -= 1;
        stream.Position = 0;
        Test_Class deserializedObject = serializer.Deserialize<Test_Class>(JsonTextReader);
    }
    stopWatch.Stop ();
    TimeSpan ts = stopWatch.Elapsed;
    string elapsedTime = String.Format ("{0:00}:{1:00}:{2:00}.{3:00}",
        ts.Hours, ts.Minutes, ts.Seconds, ts.Milliseconds / 10);
    print ("json read: " + elapsedTime);
}

我发现JSON解析性能在100000次迭代中大约快了100倍…这看起来很奇怪吗?这是我试图序列化/反序列化的类的形式:

public class Test_Class
{
    public string i { get; set; }
    public List<float> a { get; set; }
    public List<float> b { get; set; }
    public List<float> c { get; set; }
}

public void test_json(int _num, Test_Class _obj)
{
    JsonSerializer serializer = new JsonSerializer();
    MemoryStream stream = new MemoryStream();
    StreamWriter writer = new StreamWriter(stream);
    JsonTextWriter jsonWriter = new JsonTextWriter(writer);
    serializer.Serialize(jsonWriter, _obj);
    jsonWriter.Flush();
    Stopwatch stopWatch = new Stopwatch ();
    stopWatch.Start ();
    while (_num > 0) {
        _num -= 1;
        stream.Position = 0;
        StreamReader reader = new StreamReader(stream);
        JsonTextReader jsonReader = new JsonTextReader(reader);
        Test_Class deserialised_object = serializer.Deserialize<Test_Class>(jsonReader);
    }
    stopWatch.Stop ();
    TimeSpan ts = stopWatch.Elapsed;
    string elapsedTime = String.Format ("{0:00}:{1:00}:{2:00}.{3:00}",
        ts.Hours, ts.Minutes, ts.Seconds, ts.Milliseconds / 10);
    print ("json read: " + elapsedTime);
}