1 using System;2 using System.Collections.Generic;3 using System.Linq;4 using System.Text;5 using System.Diagnostics;6 7 namespace Test8 {9     class Program
10     {
11         static object obj = new object();
12
13         static void Main(string[] args)
14         {
15             var watch = Stopwatch.StartNew();
16
17             var range = ParallelEnumerable.Range(1, 100000000);
18
19             var query = (from n in range.AsParallel()
20                          where n % 5 == 0
21                          select Calculate(n)).Average();
22
23             watch.Stop();
24
25             Debug.WriteLine("耗费时间:{0}", watch.Elapsed);
26             Console.WriteLine("耗费时间:{0}", watch.Elapsed);
27         }
28
29         /// <summary>
30         /// 模拟复杂的数学计算
31         /// </summary>
32         /// <param name="num"></param>
33         /// <returns></returns>
34         static double Calculate(int num)
35         {
36             lock (obj)
37             {
38                 var sqrt = Math.Sqrt(num);
39
40                 var pow = Math.Pow(sqrt, 5);
41
42                 var log10 = Math.Log10(pow);
43
44                 var floor = Math.Floor(log10);
45
46                 return floor;
47             }
48         }
49     }
50 }

 1         static double Calculate(int num)2         {3                 var sqrt = Math.Sqrt(num);4 5                 var pow = Math.Pow(sqrt, 5);6 7                 var log10 = Math.Log10(pow);8 9                 var floor = Math.Floor(log10);
10
11                 return floor;
12         }