HHVM (Hip Hop Virtual Machine) is a just-in-time compiler developed by Facebook to run applications that are written in PHP and Hack language. HHVM is faster than the traditional PHP engine from ZEND and is used by Facebook to serve billions of web requests per day. HHVM has a 9x higher throughput of web requests and over a 5x reduction in memory consumption compared with the Zend PHP 5.2 engine + APC. see more here.
This tutorial describes the steps to install WordPress with Nginx, MariaDB and HHVM on Ubuntu 16.04 Server – 64bit.
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