Faster by like 0.05 than the commonly used strat and its pretty much impossible to lose time with it (have a pretty big window to do both dashes)
Easiest way to do it is to line up with the wall and stop moving until you clear the little platform. Then you just hold forward until you see the blue muchrooms, when you dash, and then buffer the dash once you reach the ground
Timing this room is hard so numbers might not be completely accurate, but the estimate I got from doing this strat compared to hugging the left wall was about 1s - 1.5s. Sometimes you can get hit by that last row of guys if you get a bad bounce which loses about 0.4s - 0.6s so it's still faster. If things go wrong or you mess up, then I was losing about up to 2s to my fastest times for both strats so there isn't much of a difference there. This strat seems to be more consistent though at least for me. Useful for any categories that want to quit out from this grub like grubsong%