You know how after you hit the axe after killing bowser, Mario immediately goes into a walking pace. Can't you save a couple of frames by hitting the back of the axe in order to stay at running speed as long as possible?

Ps: Sorry if this is wrong and I just wasted your time. :(

That doesn't work. If you hit the right side of the axe (as far as you can go), the game with lag a little bit and the axe won't even disappear. That's slower, and Mario always slows down to walking speed after grabbing the axe.