run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = 0; $nxt = 0; $limit = 10; for($i = 0; $i<$limit; $i++){ echo $a = $a?$a:1; $nxt = $nxt+$a; echo ", "; }
based on 22DMA

Here you find the average performance (time & memory) of each version. A greyed 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)