run code in 200+ php & hhvm versions
Bugs & Features
<?php $c=range(0,100000-1); for($i=0;++$i<$range;)$c[$i]; r[0]+=microtime(true)-$t; /* $t=microtime(true); foreach($c as $i)$i; $r[1]+=microtime(true)-$t; $t=microtime(true); $i=0; while(list(,$i)=each($c))$c[$i]; $r[2]+=microtime(true)-$t; } var_dump($r); */

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)