For the last few days my laptop battery was draining too fast. Some basic testing showed that just opening nvim would start a python process that had almost constant 40% Apple M1 CPU usage (while dipping down to 25% at times). In terms of instructions per second, it was consistently more than 6 billion ARM instructions per second, and had spawned 15 threads. Turned out it was chadtree... That was at commit ada6f02 (two weeks ago from this comment). After updating chadtree, it went away. I went back to commit ada6f02 to see if the same issue would show up again, it didn't. I would guess this chadtree has some dependency that fixed something or over time chadtree accumulates some junk to hog more CPU. If it is the latter, it can only be known over time... Unless @ms-jpq can be of help here. Her git commit messages are not helpful, and one cannot know what fixes are being made. See the attached sample git log of this project: