C# 数学计算性能对比测试

在下面的网址看到了使用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。

http://www.zxbc.cn/html/20081119/67961.html

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

//intel的性能测试例子
#include <stdio.h> 
#include <stdlib.h> 
#include <time.h> 
#include <math.h> 

//为cin cout 提供
#include <iostream>
using namespace std;

#define INTEG_FUNC(x) fabs(sin(x)) //计算公式

double dclock(void); 

int main(void) 
{ 
	unsigned int i, j, N; 
	double step, x_i, sum; 
	double start, finish, duration, clock_t; 
	double interval_begin = 0.0; 
	double interval_end = 2.0 * 3.141592653589793238; 

	start = clock(); //初始时间

	printf(" \n"); 
	printf(" Number of中文 | Computed Integral | \n"); //Win7下中文显示正常
	printf(" Interior Points | | \n"); 

	for (j=2;j<27;j++) 
	{  
		N = 1 << j;

		step = (interval_end - interval_begin) / N; 
		sum = INTEG_FUNC(interval_begin) * step / 2.0; 

		for (i=1;i<N;i++) 
		{ 
			x_i = i * step; 
			sum += INTEG_FUNC(x_i) * step; 
		} 

		sum += INTEG_FUNC(interval_end) * step / 2.0; 

		//printf(" %10d | %14e | \n", N, sum); 
        printf(" %14e  \n", sum); 
	} 

	finish = clock(); //结束时间
	duration = (finish - start); 
	printf(" \n"); 
	printf(" Application Clocks = %10e \n", duration); 
	printf(" \n"); 

	int tempA;
	cin>>tempA;

	return 0; 
}

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

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            int time = System.Environment.TickCount;  //添加计时器

            #region
            int i, j, N;
            double step, x_i, sum;
            double start, finish, duration, clock_t;
            double interval_begin = 0.0;
            double interval_end = 2.0 * 3.141592653589793238;

            for (j = 2; j < 27; j++)
            {
                N = 1 << j; 
                step = (interval_end - interval_begin) / N;
                sum = Math.Abs(Math.Sin(interval_begin)) * step / 2.0;

                for (i = 1; i < N; i++)
                {
                    x_i = i * step;
                    sum += Math.Abs(Math.Sin(x_i)) * step;
                }

                sum += Math.Abs(Math.Sin(interval_end)) * step / 2.0;
                Console.Write(sum.ToString()+"\r\n");
            }

            Console.Write((System.Environment.TickCount - time).ToString());
            Console.ReadLine();
            #endregion
        }
    }
}

32bit C# 命令行 5382ms

32bit C# WinForm 5351ms

都是重复测试了5次，最大最小误差少于30ms

从左到依次为：32bit C++、 32bit C#命令行、 32bit C#WinForm