プログラムロジックの実行時間をどのように計算しますか?
7294 ワード
--
1 class Program
2 {
3
4 [System.Runtime.InteropServices.DllImport("Kernel32.dll")]
5 static extern bool QueryPerformanceCounter(ref long count);
6 [System.Runtime.InteropServices.DllImport("Kernel32.dll")]
7 static extern bool QueryPerformanceFrequency(ref long count);
8 [STAThread]
9 static void Main(string[] args)
10 {
11 Console.WriteLine(" \r
");
12 long count = 0;
13 long count1 = 0;
14 long freq = 0;
15 double result = 0;
16
17 QueryPerformanceFrequency(ref freq);
18 QueryPerformanceCounter(ref count);
19
20 #region
21 int times = 20;
22 int value = 1;
23 string filePath = "D://123.txt";
24
25 do
26 {
27 if (!File.Exists(filePath))
28 {
29 var file = File.Create(filePath);
30 file.Close();
31 File.WriteAllText(filePath, "1");
32 }
33 else
34 {
35 value = Convert.ToInt32(File.ReadAllText(filePath));
36 value++;
37 File.WriteAllText(filePath, value.ToString());
38 times--;
39 }
40 Console.WriteLine(value);
41 } while (times > 0);
42 #endregion
43
44 QueryPerformanceCounter(ref count1);
45 count = count1 - count;
46 result = (double)(count) / (double)freq;
47 Console.WriteLine(" ， : {0} ", result);
48 Console.ReadLine();
49 }