使用 apache mod_rewrite 时重写规则的顺序对性能的影响 [英] performance impact of order of rewrite rules when using apache mod_rewrite

问题描述

虽然我读过 mod_rewrite 处理你提供给它的各种重写规则的有时不明显的方式"(例如:首先阅读 RewriteRule，然后返回检查 RewriteCond)，但是:

while i have read about the 'sometimes un-obvious way' that mod_rewrite handles the various rewrite rules you feed it (eg: first reading RewriteRule, then going back to check RewriteCond), but:

就性能而言，规则的顺序重要吗?

as far as performance is concerned, does the order of the rules matter?

apache 是否以自上而下"的方式处理它们?这意味着最常用的规则在技术上应该尽可能靠近列表的顶部?

does apache process them in a 'top down' way? meaning that the most used rules should technically be as close to the top of the list as possible?

这不是关于重叠规则等的问题，因为这个问题假设所有规则都是 [L] 并且不重叠.

this is not a question regarding overlapping rules etc, for this question assume that all the rules are [L] and non-overlapping.

所以，

最常用的规则应该尽可能靠近顶部，而较少使用的规则靠近底部吗?

should the most used rules be as close to the top as possible, while the less used ones near the bottom?

谢谢！

推荐答案

来自 RewriteRule 的文档:

From the documentation for RewriteRule:

http://httpd.apache.org/docs/current/mod/mod_rewrite.html#rewriterule

定义这些规则的顺序很重要 - 这是它们在运行时应用的顺序.

因此，如果您将常用的重写规则放在顶部，并尽可能用 L 标志标记它们，它就不会处理其余规则，并且您将拥有一个优化的配置:

So if you put your common rewrite rules at the top, and whenever possible mark them with the L flag, it won't process the rest of the rules, and you'll have an optimized configuration:

last|L - 立即停止重写过程，不再应用任何规则

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