How can one determine if mod_rewrite is causing speed issues on a PHP website?

To determine if mod_rewrite is causing speed issues on a PHP website, you can use a tool like Apache Benchmark (ab) to measure the performance of your website with and without mod_rewrite enabled. This will help you identify if there is a noticeable difference in speed when using mod_rewrite. Additionally, you can analyze the server logs to see if there are any errors or delays related to mod_rewrite rules.

RewriteEngine Off