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HomeBackend DevelopmentPHP TutorialPython vs PHP 冒泡排序和累加求和计算性能测试

测试环境: 处理器i5-3230M,64位Ubuntu 14.04
Python 2.7.6, PHP 5.4.39, PHP 7.0.0-dev(2015/04/21)

测试内容:
冒泡排序:对10个升序的数进行排序,降序输出,循环1百万次.
累加求和:0+1+2+3+...+99999999

冒泡排序测试结果对比:
程序: Python   PHP5       PHP7
耗时: 16.910s  14.715s  8.011s
内存: 35.8m    9.0m       12.5m

累加求和测试结果对比:
程序: Python   PHP5      PHP7
耗时: 10.057s  3.855s  1.855s
内存: 3.039g   8.9m      12.5m
Python内存占用达到3GB,这是什么情况?

结论:
Python和PHP都是动态脚本语言,都没有JIT机制,所以测试是公平的.
Python计算性能比不上PHP5,跟PHP7差距更大,所以以后就别黑PHP计算不如Python了.

下面是详细测试过程:

Python冒泡排序:
def bubble_sort(lst):
    length = len(lst)
    for i in range(0, length, 1):
        for j in range(0, length-1, 1):
            if lst[j]                 temp = lst[j]
                lst[j] = lst[j+1]
                lst[j+1] = temp
    return lst
for c in range(1000000):
    lst = [0,1,2,3,4,5,6,7,8,9]
    lst = bubble_sort(lst)
print(lst)
测试: time python BubbleSort.py
耗时: 0m16.910s
内存: 35.8m



Python累加求和:
sum = 0
for i in range(100000000):
    sum += i
print(sum)
测试: time python sum.py
耗时: 0m10.057s
内存: 3.039g



PHP冒泡排序:
function bubble_sort($array) {
    $size = count($array);
    for ($i=0;$i         for ($j=0;$j             if ($array[$j]                 $temp = $array[$j];
                $array[$j] = $array[$j+1];
                $array[$j+1] = $temp;
            }
        }
    }
    return $array;
}
for ($c=0;$c     $array = array(0,1,2,3,4,5,6,7,8,9);
    $array = bubble_sort($array);
}
print_r($array);
测试: time php BubbleSort.php
耗时: 0m14.715s
内存: 9.0m
测试: time phpng BubbleSort.php
耗时: 0m8.011s
内存: 12.5m




PHP累加求和:
$sum = 0;
for($i=0;$i     $sum += $i;
print_r($sum);
测试: time php sum.php
耗时: 0m3.855s
内存: 8.9m
测试: time phpng sum.php
耗时: 0m1.855s
内存: 12.5m



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