run code in 200+ php & hhvm versions
Bugs & Features
<?php foreach (range(0, 256) as $i) { echo "$i -- as int: ", ctype_digit($i), "; as string: ", ctype_digit((str)$i), "\n"; }

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)