先申明这个并不是测试各种语言的好坏，顶多是和编译优化程度有关。
c语言：
#include
int main(void) { long a=0; clock_t start, stop; double duration; start = clock(); for(int i=0;i<1000000000;i++){ a++; } stop = clock(); duration = ((double)(stop - start))/CLOCKS_PER_SEC; printf("%f",duration); return 0;}
结果是2.9s
c++
#include
int main() { long a=0; clock_t start, ends; double duration; start = clock(); for(int i=0;i<1000000000;i++){ a++; } ends = clock(); cout <<"Running Time : "<<(double)(ends - start)/ CLOCKS_PER_SEC << endl; return 0;}
结果 3.0s
php7:
$t1 = microtime(true);for($i=0;$i<1000000000;$i++){ }$t2 = microtime(true);echo '耗时'.round($t2-$t1,3).'秒';
?>
结果是11s
java 1.8:
import java.io.*;import java.lang.*;import java.util.*;class test { public static void main (String[] args) throws java.lang.Exception { long start= System.currentTimeMillis(); long a=0; for(long i=0;i<1000000000;i++){ a++; } long end= System.currentTimeMillis(); System.out.println(a); System.out.println(end-start); }}
结果是 0.449s
nodejs:
var start = new Date().getTime(); var a=0; for(var i=0;i<1000000000;i++){ a++; } var end = new Date().getTime(); console.log((end - start)+"ms") ;
结果是 1.17s
c#:
using System;using System.Diagnostics;public class Test{ public static void Main() { Stopwatch sw = new Stopwatch(); long a=0; sw.Start(); for(long i=0;i<1000000000;i++){ a++; } sw.Stop(); TimeSpan ts2 = sw.Elapsed; Console.WriteLine("Stopwatch总共花费{0}ms.", ts2.TotalMilliseconds); }}
结果0.541s
groovy:
using System;using System.Diagnostics;public class Test{ public static void Main() { Stopwatch sw = new Stopwatch(); long a=0; sw.Start(); for(long i=0;i<1000000000;i++){ a++; } sw.Stop(); TimeSpan ts2 = sw.Elapsed; Console.WriteLine("Stopwatch总共花费{0}ms.", ts2.TotalMilliseconds); }}
结果：6.2s
python3 :
#!/usr/bin/env python# _*_ coding:utf-8 _*_import time# from numba import jit### @jitdef test(): a=0 start=time.time() while a < 1000000000: a=a+1 end=time.time() print (end-start) print (a)if __name__=="__main__": test()结果 90s不过以上python代码去掉jit的注释使用jit编译后执行结果是 0.035s