[hagbard_c]

> it's PHP so your single core clocks will generally be more relevant for latency than multi-core performance, feeding many cores requires a lot of divisble work.

That is more or less built-in when you use php-fpm which launches a flock of instances. Slow things in Nextcloud like thumbnail generation are divided over whatever cores you feed it as long as you make sure to allow for enough php-fpm instances to be launched. It won't make generating a single thumbnail any faster but it does speed up generating lots of them.