3v4l.org

run code in 300+ PHP versions simultaneously
<?php $start = microtime(true); for ($i = 0; $i < 1000; $i++) { md5($i); } echo (microtime(true) - $start) . "\n"; $start = microtime(true); for ($i = 0; $i < 1000; $i++) { sha1($i); } echo (microtime(true) - $start) . "\n";

preferences:
32.49 ms | 402 KiB | 5 Q