C#测试程序运行时间

一、用C#自带的StopWatch函数

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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

 1 usingSystem;   
 2 
 3 usingSystem.Threading;   
 4 
 5 classClass1   
 6 
 7 {   
 8 
 9     [System.Runtime.InteropServices.DllImport("Kernel32.dll")]   
10 
11 static extern bool QueryPerformanceCounter(ref longcount);   
12 
13     [System.Runtime.InteropServices.DllImport("Kernel32.dll")]   
14 
15 static extern bool QueryPerformanceFrequency(ref longcount);   
16 
17     [STAThread]   
18 
19 static void Main(string[] args)   
20 
21     {   
22 
23 longcount = 0;   
24 
25 longcount1 = 0;   
26 
27 longfreq = 0;   
28 
29 doubleresult = 0;   
30 
31         QueryPerformanceFrequency(reffreq);   
32 
33         QueryPerformanceCounter(refcount);   
34 
35 //需要测试的模块
36 
37 intheisetoufa;   
38 
39 for(heisetoufa = 1; heisetoufa < 10000; heisetoufa++)   
40 
41         {   
42 
43             Console.WriteLine("第" + heisetoufa + "行");   
44 
45 if(heisetoufa == 5000)   
46 
47             {   
48 
49                 Thread.Sleep(10000);   
50 
51             }   
52 
53         }   
54 
55 //需要测试的模块
56 
57         QueryPerformanceCounter(refcount1);   
58 
59         count = count1 - count;   
60 
61         result = (double)(count) / (double)freq;   
62 
63         Console.WriteLine("耗时: {0} 秒", result);   
64 
65         Console.ReadLine();   
66 
67     }   
68 
69 }