By caching, you mean like script execution caching that PHP accelerators give? <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;List_of_PHP_accelerators" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;List_of_PHP_accelerators</a><p>Am I right in thinking that such caching comes built-in with PHP 5.5+ ?