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我在php5.2.17中安装 ZendOptimizer 后 并 没有起到程序加速的效果反而使速度降低了怎么回事，和官方说的不一样。eaccelerator 加速 我使用ab 测试发现也并不是那么明显，这是为什么呢？？？？
The Zend Optimizer boosts PHP performance by going over the intermediate code generated by the standard Zend run-time compiler and optimizing it for faster execution.
因为zo的优化只是代码级优化，你ab测时瓶颈可能并不在这。
加速加的是PHP，如果你的系统慢在MySQL上，那就没什么效果。
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
The Zend Optimizer boosts PHP performance by going over the intermediate code generated by the standard Zend run-time compiler and optimizing it for faster execution.
因为zo的优化只是代码级优化，你ab测时瓶颈可能并不在这。
加速加的是PHP，如果你的系统慢在MySQL上，那就没什么效果。