I've noticed that the check to see if the chop item shows up is taking up to 10% of fps, see the profiling below:

https://spark.lucko.me/TizH63iQQn

This was when not looking at a chopable block
I'd suggest to move the code to client tick to limit it to 20times a second instead of each frame, and maybe skip the check if the looked at block did not change

Forge 1.19.2

Ok, 0.17.8a is posted. Thanks again for reporting this

Hey, thanks for the profiler output, showed me exactly where the root of the problem was :) There already was a lot of caching with the chop indicator, but a very subtle Forge interaction was causing TreeChop to rebuild its items blacklist every frame. I've posted a new version (0.17.7), should reduce the chop indicator's idle performance impact by about 99.8%.

Hold that thought, 0.17.8 is crashing, will fix tonight

thanks for the quick fix :)