C#.dynamic和反射

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace dynamicDemo
{
    class Program
    {
        static void Main(string[] args)
        {
          
            int times = 1000000;
            DynamicSample reflectSample = new DynamicSample();
            var addMethod = typeof(DynamicSample).GetMethod("Add");
            Stopwatch watch1 = Stopwatch.StartNew();
            for(var i = 0; i < times; i++)
            {
                addMethod.Invoke(reflectSample, new object[] { 1, 2 });
            }

            Console.WriteLine(string.Format("反射耗时:{0}毫秒",watch1.ElapsedMilliseconds));

            //Display:反射耗时:630毫秒

            dynamic dynamicSample = new DynamicSample();
            Stopwatch watch2 = Stopwatch.StartNew();
            for(var i = 0; i < times; i++)
            {
                dynamicSample.Add(1, 2);
            }
            Console.WriteLine(string.Format("dynamic 耗时:{0}毫秒",watch2.ElapsedMilliseconds));
            //Display:dynamic耗时:89毫秒


            DynamicSample reflectSampleBetter = new DynamicSample();
            var addMethod2 = typeof(DynamicSample).GetMethod("Add");
            var delg = (Func<DynamicSample,int,int,int>)Delegate.CreateDelegate(typeof(Func<DynamicSample,int, int, int>), addMethod2);
            Stopwatch watch3 = Stopwatch.StartNew();
            for(var i = 0; i < times; i++)
            {
                delg(reflectSampleBetter, 1, 2);
            }
            Console.WriteLine(string.Format("优化的反射耗时:{0}毫秒",watch3.ElapsedMilliseconds));
            //Display:优化的反射耗时:17毫秒

            Console.Read();
        }
    }

    public class DynamicSample
    {
        public string Name { get; set; }
        public int Add(int a,int b)
        {
            return a + b;
        }
    }
}