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run code in 300+ PHP versions simultaneously
<?php class A { protected $dir; public function __construct() { $this->dir = __DIR__; } function aaa() { $t = microtime(true); for ($i = 0; $i < 100000; $i++) { $this->dir; } echo microtime(true) - $t; } } $a = new A(); $a->aaa();

preferences:
34.14 ms | 402 KiB | 5 Q