反射的优化和dynamic使用

  1.创建类  DynamicSample

public class DynamicSample
    {
        public string name { get; set; }

        public int Add(int a,int b)
        {
            return a + b;
        }
    }

2.运行反射和dynamic所使用的时间

int times = 10000000;
Stopwatch sw1 = Stopwatch.StartNew();
DynamicSample dynamicSample =new DynamicSample();
var addMethod = typeof(DynamicSample).GetMethod("Add");
for (int i = 0; i < times; i++)
{
    addMethod?.Invoke(dynamicSample, new object[] { 1, 2 });
}

Console.WriteLine("反射耗时：{0}毫秒 ", sw1.ElapsedMilliseconds);

Stopwatch sw2 = Stopwatch.StartNew();
dynamic dynamicSample1 = new DynamicSample();
for (int i = 0; i < times; i++)
{
    dynamicSample1.Add(1,2);
}
Console.WriteLine("dynamic耗时：{0}毫秒", sw2.ElapsedMilliseconds);

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 sw3 = 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",
sw3.ElapsedMilliseconds));