HipHop Virtual Machine¶

HipHop Virtual Machine (HHVM) is a process virtual machine based on just-in-time (JIT) compilation, serving as an execution engine for PHP and Hack programming languages.

Source: http://en.wikipedia.org/wiki/HipHop_Virtual_Machine

XRL should be compatible with HHVM. To ensure that, we actively test against HHVM in our Continuous Integration process.