请教：WCF速度似乎比Remoting慢

两段极为相似的代码，主要想看看过输与序列化过程两者的用时差异，结果10000次的调用，WCF用了11秒多，remoting用了5秒不到！
这是测试的源代码

Remoting的服务端

public class RemotCalc : MarshalByRefObject, ICalc
{
    public CalcInfo Calc(CalcInfo pInfo)
    {
        CalcInfo info = new CalcInfo();
        info.Method = string.Format("back_{0}", pInfo.Method);
        info.Para1 = pInfo.Para1;
        info.Para2 = pInfo.Para2;
        info.Result = pInfo.Result + 999;
        return info;
    }
}

WCF的服务端

public class WcfCalc : Srv.Interface.ICalc
{
    public CalcInfo Calc(CalcInfo pInfo)
    {
        CalcInfo info = new CalcInfo();
        info.Method = string.Format("back_{0}", pInfo.Method);
        info.Para1 = pInfo.Para1;
        info.Para2 = pInfo.Para2;
        info.Result = pInfo.Result + ;
        return info;
    }
}

代码可以理解为一样的，以下的客户端，两客户端也可以视为一样的过程
WCF客户端

static void Main(string[] args)
{
    using(ChannelFactory<Srv.Interface.ICalc> factory = new ChannelFactory<Srv.Interface.ICalc>("Calc2"))
    {
        Srv.Interface.ICalc calc = factory.CreateChannel();
        CalcInfo info = new CalcInfo();
        info.Method = "test";
        Console.WriteLine("press any key to run...");
        Console.ReadLine();
        int max = ;
        Console.WriteLine("it's run...");
        DateTime start = DateTime.Now;
        for (int i = ; i < max; i++)
        {
            CalcInfo res = calc.Calc(info);
        }
        TimeSpan sp = DateTime.Now - start;
        Console.WriteLine("run {0} times use {1}ms ", max, sp.TotalMilliseconds);
        Console.ReadLine();
    }
}

Remoting客户端

static void Main(string[] args)
{
    ChannelServices.RegisterChannel(new TcpClientChannel(), false);
    ICalc remoteobj = (ICalc)Activator.GetObject(typeof(ICalc),
    "tcp://localhost:6666/Calc");
    CalcInfo info = new CalcInfo();
    info.Method = "test";
    Console.WriteLine("press any key to run...");
    Console.ReadLine();
    int max = ;
    DateTime start = DateTime.Now;
    for (int i = ; i < max; i++)
    {
        CalcInfo res = remoteobj.Calc(info);
    }
    TimeSpan sp = DateTime.Now - start;
    Console.WriteLine("run {0} times use {1}ms ", max, sp.TotalMilliseconds);
    Console.ReadLine();
}

不过，有意思的是，我在CalcInfo增加一个集合属性Item，放入100个实例时，情况就完全反过来了。WCF完胜。至此，我感觉在小型的类序列化时，WCF体现不出优势，只有在传输的内容比较多的时候才有优势。
修改后的测试代码 

以下是修改后的CalcInfo类

[DataContract]
[Serializable]
public class CalcInfo
{
    public CalcInfo()
    {
        this.Items = new List<CalcItem>();
    }
    [DataMember]
    public string Method { get; set; }
    [DataMember]
    public decimal Para1 { get; set; }
    [DataMember]
    public decimal Para2 { get; set; }
    [DataMember]
    public decimal Result { get; set; }
    [DataMember]
    public List<CalcItem> Items { get; set; }

    public static CalcInfo BuildTest(int itemMax)
    {
        CalcInfo result = new CalcInfo();
        for(int i=;i< itemMax; i++)
        {
            CalcItem item = new CalcItem();
            item.Name = "test item name is " + i;
            item.Para1 = i;
            item.Para2 = i * ;
            result.Items.Add(item);
        }
        return result;
    }
}