一、用C#自带的StopWatch函数

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

namespace StopWatch
{
    class Program
    {
        static void Main(string[] args)
        {
            Stopwatch sw = new Stopwatch();
            sw.Start();
            //这里填写要执行的代码
            sw.Stop();
            Console.WriteLine("总运行时间:" + sw.Elapsed);
            Console.WriteLine("测量实例得出的总运行时间(毫秒为单位):" + sw.ElapsedMilliseconds);
            Console.WriteLine("总运行时间(计时器刻度标识):" + sw.ElapsedTicks);
            Console.WriteLine("计时器是否运行:" + sw.IsRunning.ToString());
        }
    }
}

运行结果如下:
总运行时间:00:00:00.0000013
测量实例得出的程序运行时间(毫秒为单位):0
总运行时间(计时器刻度标识):5
计时器是否运行:False

 


二、用API函数QueryPerformanceFrequency

using  System;   

using  System.Threading;   

class  Class1   

{   

    [System.Runtime.InteropServices.DllImport( "Kernel32.dll" )]   

     static   extern   bool  QueryPerformanceCounter( ref   long  count);   

    [System.Runtime.InteropServices.DllImport( "Kernel32.dll" )]   

     static   extern   bool  QueryPerformanceFrequency( ref   long  count);   

    [STAThread]   

     static   void  Main( string [] args)   

    {   

         long  count = 0;   

         long  count1 = 0;   

         long  freq = 0;   

         double  result = 0;   

        QueryPerformanceFrequency( ref  freq);   

        QueryPerformanceCounter( ref  count);   

         //需要测试的模块   

  

         int  heisetoufa;   

         for  (heisetoufa = 1; heisetoufa < 10000; heisetoufa++)   

        {   

            Console.WriteLine( "第"  + heisetoufa +  "行" );   

             if  (heisetoufa == 5000)   

            {   

                Thread.Sleep(10000);   

            }   

        }   

  

         //需要测试的模块   

  

        QueryPerformanceCounter( ref  count1);   

        count = count1 - count;   

        result = ( double )(count) / ( double )freq;   

        Console.WriteLine( "耗时: {0} 秒" , result);   

        Console.ReadLine();   

    }   

}