search
Homephp教程php手册array_push 效率测试

array_push 效率测试

Jun 13, 2016 am 10:48 AM
arraypphppushexistefficiencyarraymethodtestuseofAssignment

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 
Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

MantisBT

MantisBT

Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.

MinGW - Minimalist GNU for Windows

MinGW - Minimalist GNU for Windows

This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.

SublimeText3 English version

SublimeText3 English version

Recommended: Win version, supports code prompts!

PhpStorm Mac version

PhpStorm Mac version

The latest (2018.2.1) professional PHP integrated development tool

EditPlus Chinese cracked version

EditPlus Chinese cracked version

Small size, syntax highlighting, does not support code prompt function