Comment by flohofwoe

Almost all games also had subtle microstutter until some Croteam peeps actually looked into it and figured out what's wrong with naive frame timing on modern operating systems: https://medium.com/@alen.ladavac/the-elusive-frame-timing-16...)

TL;DR: the precision of your time source won't matter much since thread scheduling gets in the way, one general solution is to apply some sort of noise filter to remove jitter