测试程序运行时间

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();

}

}