PHP __autoload()方法真的影响性能吗?_PHP
对于php性能问题,议论最多的就是__autoload()方法,很多人提到这个方法非常影响性能。还有人说opcode也能影响到__autoload()方法,所以针对这两点我做了个测试。
最终发现__autoload方法在性能方面的影响不是很大的。
环境
PHP:5.3.9 ——以fastcgi模式启动
Nginx:1.1.12
eaccelerator:0.9.6.1
。 最终发现__autoload方法在性能方面的影响不是很大的。
环境 PHP:5.3.9 ——以fastcgi模式启动 Nginx:1.1.12 eaccelerator:0.9.6.1 截图:
图1
我在浏览器里通过刷新得到的结果分别如下: Total Time:0.10401391983032 Total Time:0.10252094268799 Total Time:0.095267057418823 Total Time:0.10013008117676 Total Time:0.096842050552368 Total Time:0.097998142242432 Total Time:0.10348510742188 Total Time:0.096648931503296 测试:不经过__autoload()图2
测试结果——通过刷浏览器 Total Time:0.10309100151062 Total Time:0.10285210609436 Total Time:0.10154414176941 Total Time:0.097845792770386 Total Time:0.099545001983643 Total Time:0.10166597366333 最终看到的结果:autoload方法没有出现明显的性能下降 测试:取消eAccelerator缓存进行测试 图1的测试结果 Total Time:0.24992394447327 Total Time:0.25681900978088 Total Time:0.25327301025391 Total Time:0.22580695152283 Total Time:0.22656512260437 Total Time:0.22530484199524 Total Time:0.23080611228943 图2的测试结果 Total Time:0.23054909706116 Total Time:0.22633790969849 Total Time:0.23442888259888 Total Time:0.2350070476532 Total Time:0.22897601127625 Total Time:0.23207712173462__autoload()方法在性能上还是没有明显的影响。
总结 通过上面的两组实验得出: 1>__autoload方法没有明显的性能损失。所以大家不要介于使用__autoload方法。 2>opcode对代码的影响是比较大的,明显使用opcode的时候,php代码执行速度提高了将近2倍多。
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