While running a Legend of Zelda NES rom for TASing, I'm noticing a lot of stuttering - however, when I checked the piano roll, I didn't see it being noted as lag frames. It's always on the same places - so far I've noticed it happen as the game begins, when I perform my first screen scroll, and when I enter the first screen to the right of the starting screen.
I've tried redownloading the ROM and closing and reopening BizHawk, to no success. It seems to be my computer, but I'm not sure how to diagnose that?
UPDATE: I've tried running a different TAS, this one of Super Mario Bros. for NES, and I'm noticing the stuttering in that one two. I've tried all three NES cores available and they all contain some stuttering, so my guess is either BizHawk itself is messed up or my computer doesn't have enough resources to allocate to allow it to run properly.