Well.. I'm running it on an M3 and it can be truly slow. Not always! But opening up a package inside a multi-module Kotlin project can literally take 10 seconds. Which isn't much seeing how great of an IDE it is and how much time it saves because it is so powerful. But it's heavy alright. Every time I see new features I don't really use, I wish they would invest in trimming fat instead.
There's something really not right there. Right click the bottom right status bar area, enable memory monitor and ensure you aren't running out of RAM or something. I use IntelliJ on an old Intel MacBook with a large Kotlin project and its performance is good. I never have to wait ten seconds for something like that. It sounds like you may have some old flag that's limiting its heap size or pushing it into GC thrashing or something. Definitely look at the IDE logs and see if you can track it down.
