run code in 200+ php & hhvm versions
Bugs & Features
<?php class c { protected $b; public function __construct() { $this->b = "hahahaha\n"; } public function __get($b, $args) { return $this->{$b}; } } $c = new c; var_dump($c->b);

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)