run code in 200+ php & hhvm versions
Bugs & Features
<?php for($i = 0; $i < 256; ++$i){ for($k = 0; $k < 256; ++$k){ $z = sprintf("%%%08x%%08x", $i, $k); echo $z."\n"; $x = mb_strtolower(urldecode($z)); if($x=="'"){ echo $z."\n"; } } }
based on 4bnve

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)