C#成员函数直接调⽤和反射+委托的性能⽐较using System;
using System.Reflection;
using System.Diagnostics;
namespace Refl
{
class Test
{
public void Method()
{
}writeline函数
}
class MainClass
{
const int loops = 100000000;
Test m_Test = new Test();
Action m_Action;
public MainClass()
{
Type t = typeof(Test);
MethodInfo m = t.GetMethod("Method");
m_Action = (Action)Delegate.CreateDelegate(typeof(Action), m_Test, m);
}
public void Test1()
{
Stopwatch stopWatch = new Stopwatch();
stopWatch.Start();
for (int i = 0; i < loops; ++i)
{
m_Test.Method();
}
stopWatch.Stop();
Console.WriteLine("Test1 - direct invoke: " + stopWatch.ElapsedMilliseconds);
}
public void Test2()
{
Stopwatch stopWatch = new Stopwatch();
stopWatch.Start();
for (int i = 0; i < loops; ++i)
{
m_Action();
}
stopWatch.Stop();
Console.WriteLine("Test2 - delegate invoke: " + stopWatch.ElapsedMilliseconds);
}
public static void Main(string[] args)
{
MainClass main = new MainClass();
main.Test1();
main.Test2();
Console.ReadKey();
}
}
}
Xamarin - Release
Test1 - direct invoke: 621
Test2 - delegate invoke: 646
Visual Studio - Release
Test1 - direct invoke: 240
Test2 - delegate invoke: 261

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