HHVM is still a bit faster than PHP7 in most benchmarks (wordpress, etc.). HHVM has also JIT and consumes less memory per request. Though PHP7 is more backward

HHVM is still a bit faster than PHP7 in most benchmarks (wordpress, etc.). HHVM has also JIT and consumes less memory per request. Though PHP7 is more backward compatible with real word PHP5 code bases and is easier to install.