run code in 200+ php & hhvm versions
Bugs & Features
<?php $testArray; for ($i = 0; $i <= 100; $i++) { $testArray[] = "This is: ". $i; } foreach ($testArray as $number) { echo $number; echo $testArray[100]; }

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)