Does it cause the screen to jitter, flash, give one headaches when it does the screen update or requires one to take a coffee break when using?
If no keep going.
I use to worry about such things a long time ago and found that it was usually just one thing done wrong that would shoot up the runtime. So obviously that would get fixed. Never seems to amaze me how much a processor will do between the time you press and then release a key. I think about some of the online games I play that update with 50 players in a massive battle with the player interaction calculations being done on a central server thousands of miles away and it just works.