Hello guys :) I've been watching OoT speedruns for years, and now I'd like to start speedrunning it myself. But for some unknown reason, Project64 runs at 7-8fps on my computer while Dolphin and Cemu run at a decent framerate. So here is my question : can I speedrun it on GCN/Wii/WiiU VC on emulators such as Dolphin or Cemu ? Is there any major differences ? Is it legal to submit these runs ?

I don't believe it is legal.

If you have a Wii, I'd softmod JP OoT onto it and play on that. It's not hard and would be submittable.

If you dont want to run on Wii or can't for some reason I would see why PJ64 is running like that. Unless your pc is over 10 years old it should run PJ64 no sweat at all. Use version 1.7 from the oot resources and make sure you have a decent ROM.

Here something you might like. Also, you could use Project 64 1.6 or 1.7, anything higher is illegal (because it is faster than any official releases.)