HHVM Plans To Integrate LLVM This Year Written by Michael Larabel in LLVM on 17 February 2015 at 10:04 PM EST. Add A Comment Coming soon is the HHVM 3.6 release for making PHP even faster and Facebook's Hack derivative even better, but further out into 2015 are even more exciting improvements. Josh Watzman at Facebook wrote about changes for the upcoming release of HHVM 3.6 for Hack and PHP along