run code in 200+ php & hhvm versions
Bugs & Features
<?php $start = microtime(true); sleep(2); $calculated = microtime(true) - $start; echo "time_here: " . $calculated . "\n"; ?> # result: 1.9073486328125E-6
based on 5bbDR

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)