run code in 200+ php & hhvm versions
Bugs & Features
<?php abstract class Base { private $foo; public void setFoo($foo) { $this->foo = $foo; } public function foo() { return $this->foo; } } class Foo extends Base { public function foo() { return ' - '.parent::foo(); } } $obj = new Foo(); $obj->setFoo('yay'); var_dump($obj->foo());

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)