3v4l.org

run code in 500+ PHP versions simultaneously
<?php final readonly class A { public stdClass|null $foo = null; }

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).

VersionSystem time (s)User time (s)Memory (MiB)
8.3.50.0030.00518.50
8.2.70.0090.00617.25

preferences:
41.93 ms | 493 KiB | 4 Q