HHVM 3.6.0 recently released, is an open-source virtual machine designed for executing programs written inHack and PHP. HHVM 3.6 comes with lots of new goodies. In particular, many new Async features are now available by default including AsyncMySQL andMCRouter (memcache) support. Combined with existing support for asynchronous cURL, applications are now ready to deeply parallelize many common forms of costly data access. HHVM 3.6 changelog Release the async mysql extension Release an async MCRouter extension FastCGI largely re-written; should fix several rare crashes Make sure that C++ method signatures match the HNI Make the typechecker be as strict about XHP classes as other classes.