[spdionis]

> Always, really? The history of PHP opcode's caches is complex. Before PHP5.6 where Zend published their opcache+, I've seen the various solutions (APC and others) cause vicious bugs.

First of all realpath_cache_size is unrelated to opcache and has always worked well. The only problem with that configuration is that the default is waay too low for modern frameworks.

Also I think GP meant that now you can always finetune the opcode cache. The current opcache is built into php 5.5+ and just works. It works so well that there are almost no competitors because there is no need.