run code in 200+ php & hhvm versions
Bugs & Features
<?php function test(&$error) { $response = (object)array(); $fail = function($err) { use $error; $error[] = $err; return $response; }; return $fail('invalid derp'); } $error = array(); test($error); var_dump($error);

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)