Java Go Python简单性能测试

1. java（28秒）

import java.util.Date;


public class fff {
    public static void main(String[] args) {

        Date start = new Date();
        long a = fibo(50);
        System.out.println(a); //25172538050
        Date end = new Date();
        int j = (int) (end.getTime() - start.getTime());
        System.out.println("所用时间-->"+j); //所用时间-->28101 //28秒

    }

    public static long fibo(int n) {
        if (n == 1 || n == 2) {
            return 2;
        } else {
            return fibo(n - 1) + fibo(n - 2);
        }
    }

}

2. Go（40秒）

package main

import "fmt"
import "time"

func fibo(n int64) uint64 {
	if n == 1 || n == 2 {
		return 2
	} else {
		return fibo(n-1) + fibo(n-2)
	}
}

func main() {
	
	start := time.Now().Unix()
	res := fibo(50)
	end := time.Now().Unix()
	fmt.Println(res) //25172538050
	j := int64(end) - int64(start)
	fmt.Println("所用时间-->", j) //所用时间--> 40秒

}

3. Python（2800秒）

import time


def fibo(n):
    if n == 1 or n == 2:
        return 2
    else:
        return fibo(n - 1) + fibo(n - 2)


start = time.time()
res = fibo(50)
end = time.time()
print(res)  # 25172538050
print(end - start)  # 2801.014867544174