6-4 IL 181 (19s) WR

This run improves the previous record by 1s.
RTA time: 20s 481ms (prev. 21s 898ms by Polonxy)
I implement a strategy at 0:19 that's been known for a while. I have found you want to slide off the edge rather than jumping with low speed to do the trick. This saves 0.53s.
I'm also able to jump before getting the mushroom (frame perfect) at the very start saving 5 frames by hitting the spring earlier.
The level is very input intensive, and I also use d-pad instead of the circle-pad to not lose time switching between ducking and running. There was one time loss at 0:20 from ducking too late. Ducking at the end of a conveyor gives Mario a speed boost (as seen at the start of the level).
1 more IL to go!
IL count: 99/100

[@glucosefructose]

speedy

[@Mitol-7]

I could never make it past that level when I was younger