C# 计时函数(毫秒)
2021-04-14 08:25
标签：col 变量 val star system ice dia service int C# 计时函数(毫秒) 标签：col 变量 val star system ice dia service int 原文地址：https://www.cnblogs.com/LicwStack/p/8968361.htmlusing System;
using System.Diagnostics;
using System.Runtime.InteropServices;
using System.Threading;
class Program
{
//调用API函数
[DllImport("kernel32.dll")]
extern static short QueryPerformanceCounter(ref long x);
[DllImport("kernel32.dll")]
extern static short QueryPerformanceFrequency(ref long x);
static void Main(string[] args)
{
// 方法一
Stopwatch stopWatch = new Stopwatch();
stopWatch.Start();
Thread.Sleep(1000);
stopWatch.Stop();
long times1 = stopWatch.ElapsedMilliseconds;
Console.WriteLine("RunTime " + times1);
// 方法二
long stop_Value = 0;
long start_Value = 0;
long freq = 0;
QueryPerformanceFrequency(ref freq); //获取CPU频率
QueryPerformanceCounter(ref start_Value); //获取初始前值
Thread.Sleep(1000);
QueryPerformanceCounter(ref stop_Value);//获取终止变量值
var times2 = (stop_Value - start_Value) / (double)freq * 1000;
Console.WriteLine("RunTime " + times2);
}
}