c# 三种计算程序运行时间的方法
2021-07-04 22:14
标签:lin star nbsp read mes time man ons 程序运行时间 三种计算c#程序运行时间的方法 第二种 第三种 测试结果: 二三两种方法结果比较准确 c# 三种计算程序运行时间的方法 标签:lin star nbsp read mes time man ons 程序运行时间 原文地址:https://www.cnblogs.com/dearzhoubi/p/9842452.html
第一种:
利用 System.DateTime.Now// example1: System.DateTime.Now method
DateTime dt1 = System.DateTime.Now;
System.Threading.Thread.Sleep(time_cap);
DateTime dt2 = System.DateTime.Now;
TimeSpan ts = dt2.Subtract(dt1);
Console.WriteLine("example1 time {0}", ts.TotalMilliseconds);
利用Stopwatch// example2: Stopwatch class
System.Diagnostics.Stopwatch sw = new System.Diagnostics.Stopwatch();
sw.Start();
System.Threading.Thread.Sleep(time_cap);
sw.Stop();
TimeSpan ts2 = sw.Elapsed;
Console.WriteLine("example2 time {0}", ts2.TotalMilliseconds);
利用c++ API// example3: c++ API
long count1 = 0;
long count2 = 0;
long freq = 0;
double result = 0;
QueryPerformanceFrequency(ref freq);
QueryPerformanceCounter(ref count1);
System.Threading.Thread.Sleep(time_cap);
QueryPerformanceCounter(ref count2);
result = (double)(count2 - count1) / (double)freq;
Console.WriteLine("example3 time {0}", result);
example1 time 2001.486
example2 time 2000.6587
example3 time 2.00032488719712