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

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