减少包含/需求的数量会提高性能吗? [英] Will reducing number of includes/requires increase performance?

问题描述

什么是更好的脚本性能调整方法?

What is better practice for script performance tuning?

这个吗?

require_once("db.php");

if (!is_cached()) {
  require_once("somefile.php");
  require_once("somefile2.php");
  //do something
} else {
  //display something
}

还是这个?

require_once("db.php");
require_once("somefile.php");
require_once("somefile2.php");

if (!is_cached()) {
  //do something
} else {
  //display something
}

是否值得在流量控制结构中包含/要求包含或不包含?

Is it worth placing includes/requires into flow control structures or no?

谢谢

推荐答案

是的，它将提高性能，并且与其他人所说的相反，影响可能微不足道.

Yes, it will increase performance and contrary to what others said, the impact may not be negligible.

当您包含/需要文件时，PHP将检查所有已定义的include_paths，直到找到该文件或没有其他要检查的内容为止.根据包含路径的数量和要包含的文件的数量，这将对您的应用程序产生严重影响，尤其是在预先包含每个文件时.懒惰包括(例如您的第一个示例)，或者甚至更好-建议使用自动装带器.

When you include/require files, PHP will check all the defined include_paths until it finds the file or there is nothing more to check. Depending on the amount of include pathes and the amount of files to include, this will have a serious impact on your application, especially when including each and every file up front. Lazy including (like in your first example) or - even better - using the Autoloader is advisable.

有关此内容的详细阅读内容，

Related reading that addresses this in more details:

• Zend框架性能指南 *

^{*此处给出的建议适用于任何应用程序或框架}

^{*The advice given there is applicable to any application or framework}

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