发布时间:2020-06-11编辑:佚名阅读(1921)
第一种方法利用System.DateTime.Now:
static void SubTest() { DateTime beforDT = DateTime.Now; //耗时巨大的代码 DateTime afterDT = DateTime.Now; TimeSpan ts = afterDT.Subtract(beforDT); Console.WriteLine("DateTime总共花费{0}ms.", ts.TotalMilliseconds); }
第二种用Stopwatch类(System.Diagnostics):
static void SubTest() { Stopwatch sw = new Stopwatch(); sw.Start(); //耗时巨大的代码 sw.Stop(); TimeSpan ts2 = sw.Elapsed; Console.WriteLine("Stopwatch总共花费{0}ms.", ts2.TotalMilliseconds); }
第三种用API实现:
[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); static void SubTest() { long count = 0; long count1 = 0; long freq = 0; double result = 0; QueryPerformanceFrequency(ref freq); QueryPerformanceCounter(ref count); //耗时巨大的代码 QueryPerformanceCounter(ref count1); count = count1 - count; result = (double)(count) / (double)freq; Console.WriteLine("QueryPerformanceCounter耗时: {0} 秒", result); }
也可以使用委托对其进行封装,方便调用:
/// <summary> /// 计算时间 /// </summary> /// <param name="function">要被执行的代码</param> /// <returns>执行这一段代码耗时,单位:毫秒</returns> public static string Stopwatch(Action function) { System.Diagnostics.Stopwatch sw = new System.Diagnostics.Stopwatch(); sw.Start(); //开始执行业务代码 function(); sw.Stop(); TimeSpan timeSpan = sw.Elapsed; return (timeSpan.TotalMilliseconds) + "ms"; }
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