Adapter Lag?

I can do moves very easy outside mame, but when im in it, even offline, its kind of more hard. Does it could be the adapter? Is it mame in general? Or im just weird?

Could be you, usually if your doing the move to slow or fast, try switching the turbo settings. Turbo 3/2 works for me just fine, another thing it’s arcade so the timing for a move has to be precise; movement first then button.