I'm working on a new run which makes use of more eggs when they help save time (since I had discovered how to make eggs and spit out enemies much quicker).
I'm thinking of using the 2-1 warp glitch mentioned a few pages back to skip the long autoscrolling section.
I fucking HATE autoscrolling levels.
So that'll be around 80 seconds saved. Also, the collision with the piranha plant in world 3-8 (piranha castle) can be easily avoided with a few extra hits to an egg block and...the crab in 3-4 can be destroyed with three consecutive eggs. I'll try to grab more coins and avoid flowers, red coins, and stars whenever possible...for every item avoided, a frame is saved. It won't be the highest priority.
Jumping is only faster on slopes and at the beginning of each level for quicker acceleration...but since there are some levels with a lot of slopes and platforms there will still be a good helping of jumps.
progress so far
recorded with snes9x WIP and v1.0 (U) of the rom
edit: finished world 1...10 seconds faster!