Facebook and PHP are kind an interesting twist on that. Facebook spent a lot of time and money on Hack/HHVM, then the PHP core devs responded with a new versio

Facebook and PHP are kind an interesting twist on that. Facebook spent a lot of time and money on Hack/HHVM, then the PHP core devs responded with a new version of PHP that is, in many cases, faster. Though Hack/HHVM is still better for async work.