 PHP-FPM is stable under a low load but I find crashes more often then litespeed's API under a high load. Cloudlinux's lsapi is more performant and will probably (if not already) soon be more stable like with native litespeed. PHP-FPM is only secure with Opcache when a seperate instance is run per user. Lsapi has a processgroup method that makes it secure nativly. If cPanel implements a config file / instance per user than PHP-FPM would be secure with opcache. However I don't see that hapening. PHP-FPM is stable under a low load but I find crashes more often then litespeed's API under a high load. Cloudlinux's lsapi is more performant and will probably (if not already) soon be more stable like with native litespeed. PHP-FPM is only secure with Opcache when a seperate instance is run per user. Lsapi has a processgroup method that makes it secure nativly. If cPanel implements a config file / instance per user than PHP-FPM would be secure with opcache. However I don't see that hapening. 