[marcofatica]

They're probably using PHP's built in opcache or something they rolled themselves

  OPcache improves PHP performance by storing precompiled script bytecode in shared memory

https://www.php.net/manual/en/intro.opcache.php

[chx]

opcache is definitely on https://github.com/dunglas/frankenphp/blob/f97f56d45a403342b...