More cores are better, but you are limited by the slowest chain. So you can have 100 of cores, but if only one chain can't be computed for time duration of the

More cores are better, but you are limited by the slowest chain. So you can have 100 of cores, but if only one chain can't be computed for time duration of the buffer it will stutter. It is not uncommon to have like %15 utilisation on 16+ core cpu and having it stutter, because all cores are too slow to process the chain on time.