在下面的网址：http://www.2cto.com/kf/201111/112209.html 看到了使用MS的CL、gcc、Intel的icl、PGI的pgcc及Codegear的bcc 几个不同编译器编译的C/C++ 程序性能对比，结论是Intel的编译器性能最高。
同样把这段Intel的SDK中的代码迁移到C#中比较一下
我的笔记本是：Intel Core4 P8700 2.53G的CPU，4G内存，Win7 64bit系统，VS2010自带的编译器
对于代码略作调整和注释
C++代码
01 //intel的性能测试例子
02 #include
03 #include
04 #include
05 #include
06
07 //为cin cout 提供
08 #include
09 using namespace std;
10
11 #define INTEG_FUNC(x) fabs(sin(x)) //计算公式
12
13 double dclock(void);
14
15 int main(void)
16 {
17 unsigned int i, j, N;
18 double step, x_i, sum;
19 double start, finish, duration, clock_t;
20 double interval_begin = 0.0;
21 double interval_end = 2.0 * 3.141592653589793238;
22
23 start = clock(); //初始时间
24
25 printf(" \n");
26 printf(" Number of中文| Computed Integral | \n"); //Win7下中文显示正常
27 printf(" Interior Points | | \n");
28
29 for (j=2;j<27;j++)
30 {
31 N = 1 << j;
32
33 step = (interval_end - interval_begin) / N;
34 sum = INTEG_FUNC(interval_begin) * step / 2.0;
35
36 for (i=1;i 37 { 38 x_i = i * step; 39 sum += INTEG_FUNC(x_i) * step; 40 } 41 42 sum += INTEG_FUNC(interval_end) * step / 2.0; 43 44 //printf(" %10d | %14e | \n", N, sum); 45 printf(" %14e \n", sum); 46 } 47 48 finish = clock(); //结束时间 49 duration = (finish - start); 50 printf(" \n"); 51 printf(" Application Clocks = %10e \n", duration); 52 printf(" \n"); 53 54 int tempA; 55 cin>>tempA; 56 57 return 0; 58 } 默认编译参数，都是Release编译后，拿出exe文件独立运行 32bit C++ 6338ms C# 代码 01 using System; 02 using System.Collections.Generic; 03 using System.Linq; 04 using System.Text; 05 06 namespace ConsoleApplication1 07 { 08 class Program 09 { 10 static void Main(string[] args) 11 { 12 int time = System.Environment.TickCount; //添加计时器 13 14 #region 15 int i, j, N; 16 double step, x_i, sum; 17 double start, finish, duration, clock_t; 18 double interval_begin = 0.0; 19 double interval_end = 2.0 * 3.141592653589793238; 20 21 for (j = 2; j < 27; j++) 22 { 23 N = 1 << j; 24 step = (interval_end - interval_begin) / N; 25 sum = Math.Abs(Math.Sin(interval_begin)) * step / 2.0; 26 27 for (i = 1; i < N; i++) 28 { 29 x_i = i * step; 30 sum += Math.Abs(Math.Sin(x_i)) * step; 31 } 32 33 sum += Math.Abs(Math.Sin(interval_end)) * step / 2.0; 34 Console.Write(sum.ToString()+"\r\n"); 35 } 36 37 Console.Write((System.Environment.TickCount - time).ToString()); 38 Console.ReadLine(); 39 #endregion 40 } 41 } 42 } 32bit C# 命令行