Facebook originally did compile their PHP to C++ though. https://en.wikipedia.org/wiki/HipHop_for_PHP https://en.wikipedia.org/wiki/HipHop_for_PHP Only later d

Facebook originally did compile their PHP to C++ though. https://en.wikipedia.org/wiki/HipHop_for_PHP https://en.wikipedia.org/wiki/HipHop_for_PHP Only later did they introduce Hack and HHVM, which compiles a PHP dialect in a just in time fashion. My point is that once you reach scale, and your computer bill becomes significant enough, you'll really want to use efficient languages.