run code in 200+ php & hhvm versions
Bugs & Features
<?php class k { protected $b = 123; public function getB() { return $this->b; } } $k = new k(); var_dump($k->getB()); var_dump(!$k->getB()); var_dump(!$k->getB() !== 200);

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)