天天看点

对比JAVA、Python、C、Go运行时间,我惊呆了!!!

对比JAVA、Python、C、Go运行时间,我惊呆了!!!

周末在寝室刷完算法,想放松一下,于是做了一个实验:用现在主流的几种编程语言对0 - (10000000 - 1)求和,结果我惊呆了,话不多说,show me your code!!!

python

import time

sum = 0

start = time.time()
for i in range(10000000):
    sum += i
end = time.time()

print(end - start)
           

java

public static void main(String[] args) {


        long startTime=System.currentTimeMillis();   //获取开始时间
        int sum = 0;
        for(int i=0;i<10000000;i++){
                 sum +=i;
             }
        long endTime=System.currentTimeMillis(); //获取结束时间
        System.out.println(endTime - startTime);

    }
           

Go

package main

import "fmt"
import "time"

func main(){
	sum := 0
	var start = time.Now()
	for i := 0; i< 10000000; i++ {
		sum += i
	}
	fmt.Println(sum)
    var end = time.Since(start)
    fmt.Println(end)
}
           

C

#include <stdio.h>
#include <time.h>

int main() {
    clock_t start, end;
    double duration, sum;
    start = clock();
    for (int i = 0; i < 10000000; i++){
        sum += i;
    }
    end = clock();
    duration = (double)(end - start) / CLOCKS_PER_SEC;
    printf("%f s", duration);
    return 0;
}
           

我的电脑是magicbook,8G内存,运行的各自结果如下:

  • go 7.9944ms
  • c 0.036s
  • python 1.96s
  • java 16ms

关于python的结果早就料想到了,但另外3中语言居然超出了预料!!!