aight so in this guide ill tell ya about all the speedrun tech that has been documented.

Template: TECH NAME/suggested shorthand name: difficulty (number of *), frame window description and when its useful

DASHJUMP: difficulty *, no frame window literally just dash and then jump afterwards, it isnt very useful as in most cases you can hyper instead.

HYPERDASH/hyper: difficulty **, frame window unknown (at least to me) similar to a dashjump, but with the inputs closer together. you should get a decent amount of horizontal speed. This is basically the main speed tech you'll use, its useful in basically every level.

EXTENDED HYPER/e-hyper: difficulty ***, frame window also unknown (at least to me) Hyper off the ground with a bit more time between the inputs and you'll retain your dash. not too useful as in most cases a hyper is enough.

WALLBOUNCE/wounce: difficulty ***, 14 frame window jump off a wall after hypering, and you should see a flash of light. useful to climb walls that arent meant to be climbed.

BOOSTER WALLBOUNCE/b-wounce: difficulty ***, 14 frame window a walbounce from a horizontal booster instead of a hyper. useful in places where you need to wallbounce and then dash, as these wallbounces retain your dash.

SPIKEJUMP: difficulty **, 2 frame window, slightly longer if Josie has her double jump spikes have a 2 frame window where they dont kill you, and it is possible to jump in this window. with a little practice, this tech becomes incredibly consistent, with some people getting over 100 in a row

CORNERBOOST/c-boost: difficulty ***, works as long as you are hypering Hyper into the top corner of a block to boost forward and regain your jumps, useful if you can set it up easily as it is faster than a hyper

CLIMB CANCEL: difficulty *, unknown frame window climb up a corner and jump just before you finish to jump slightly higher, there arent many uses but its good to know

MEGA WALLBOUNCE/m-wounce: difficulty ****, unknown c-boost into a wall and jump when you hit it, allows a higher wounce

DASH DROP: difficulty **, n/a press down while hypering or dashing to stop dashing. useful to get away from some thwomps

FASTFALL: difficulty insanely easy, n/a press down while midair to fall faster. Useful exactly when you'd think it would be. Also increases the speed of falling blocks if you are standing on them

FASTFIREBALL/fastfire?: difficulty *, n/a hold dash while in a fireball to go faster, like fastfalling its just a generally useful thing to do

Thus concludes the tech compendium v2, ill edit this when more tech is found