Weird stuttering?

I don't notice this much when playing on windows roblox or anything, but i notice a lot that it seems like players seem to stutter around a handful amount. is this actually a sober thing? and if so is there any way to get around it from happening?

i also notice quite a lot that the textures seem to just go down in quality at random, then go back up, much more minor, but i thought id mention it.