See: HHVM and PHP. HHVM is what lit the fire under the PHP team's collective butts to improve perf, and now most just run the mainline PHP interpreter (well, th

See: HHVM and PHP. HHVM is what lit the fire under the PHP team's collective butts to improve perf, and now most just run the mainline PHP interpreter (well, they did years ago when all this happened and I was still doing PHP)