Recently I decided to run some upgrades on my servers, and go up to PHP 5.5. I’ve been using APC for a while (convenience) – usually is also bundled with all available repositories, or you can just grab it via PECL. Before that I was always with XCache . But… as long APC is no lonager maintained (last upgrade 2012) I make a call about going to XCache. Run some benchmarks, and here what we got.
Probably you already heard about HHVM . As on their website:
HHVM is an open-source virtual machine designed for executing programs written in Hack and PHP . HHVM uses a just-in-time (JIT) compilation approach to achieve superior performance while maintaining the development flexibility that PHP provides.
Using simple terms – HHVM allows you run scripts written in PHP but much, much more faster. Obviously you the main purpose of HHVM is to run HACK language, but it works pretty good with PHP itself.