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array_push 效率测试

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Release: 2016-06-13 10:48:37
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在php中数组赋值的时候用array[]这种方法效率会较高于array_push(),于是乎各种缘由就有了下面的测试
测试代码:
 1  2     /**
 3     *数组性能测试
 4     *for循环有性能影响所以没有用
 5     *测试是更改$count参数(从10~100000 整取递增)和调用方法手动刷新,记录时间为平均大概时间
 6     **/
 7
 8     $count = 10;
 9    
10     arrayTest01($count);   
11
12     function arrayTest01($count){
13         $arr = array();
14                 $time = microtime(true);
15         for($i = 0; $i 16             $array[] = $i;
17         }
18         echo (microtime(true) - $time);
19     }
20
21     function arrayTest02($count){
22         $arr = array();
23                 $time = microtime(true);
24         for($i = 0; $i 25             array_push($arr, $i);
26         }
27         echo (microtime(true) - $time);
28     }
29
30 ?>

效率大概是array[]快将近一倍,测试环境是ubuntu 11 和 windows 7

windows php-5.2.17/ Apache2.2
times($count)    10 100 1000
10000   100000   1000000
 
array[] 2.31E-05 0.000104
0.000867 0.008417 0.043666
0.288323
array_push        2.79E-05
0.000181 0.001614 0.014447
0.055875 0.491052
ubuntu11.04 PHP 5.3.6/apache2.2
array[] 1.91E-05 7.70E-05
0.000726 0.007669 0.040492 报错
 
array_push        2.50E-05
1.26E-04 0.001149 0.013714
0.056978 报错

这是官方网站上的说辞
Note: 如果用 array_push() 来给数组增加一个单元,还不如用 $array[] = ,因为这样没有调用函数的额外负担。
官网链接:
http://cn.php.net/array_push


 

摘自  静以修心 
source:php.cn
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