run code in 200+ php & hhvm versions
Bugs & Features
<?php $matches = []; $reg = '/(?:^|(?:\s*\,\s*))([^\x00-\x20\(\)<>@\,;\:"\/\[\]\?\=\{\}\x7F]+)(?:\=(?:([^\x00-\x20\(\)<>@\,;\:"\/\[\]\?\=\{\}\x7F]+)|(?:"((?:[^"\]|\.)*)")))?/'; preg_match_all($reg, 'User-Agent, Accept', $matches, PREG_SET_ORDER); var_dump($matches); echo 'aaa' ; var_dump('bb');
based on mfS2i

Here you find the average performance (time & memory) of each version. A grayed out version indicates it didn't complete successfully (based on exit-code).
Note: hhvm uses a JIT which only kicks in after a few runs. Since we run scripts only once, hhvm always runs slower.

VersionSystem time (s)User time (s)Memory (MiB)