3v4l.org

run code in 300+ PHP versions simultaneously
<?php $time=microtime(1); for ($i=0;$i<100000;$i++) hash('adler32', 'string'); echo microtime(1)-$time,': hash/adler32'."\n"; $time=microtime(1); for ($i=0;$i<100000;$i++) hash('md5', 'string'); echo microtime(1)-$time,': hash/md5'."\n";

preferences:
55.48 ms | 402 KiB | 5 Q