run code in 200+ php & hhvm versions
<?php $dt = new DateTime(); $dt->setTimezone(new DateTimeZone('Africa/Tunis')); $dt->setTimestamp(123456789); echo $dt->format('F j, Y @ G:i');

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)