Emacs turns unresponsive with a long delay when killing buffer with a large number of buffers open about bufler.el HOT 2 CLOSED

The grouping functions are applied to each buffer when the grouping is updated; there's no way around that.

Caching is already implemented, but as a whole, not for individual buffers or groups. Doing it by buffer or section would essentially invert the data structure and add an additional step to translate from one to the other, so I probably wouldn't be interested in that.

700 buffers is a lot. I've never used anywhere near that many.

If you're finding that performance is an issue, I'd suggest trying the native-comp branch. You can easily try it with this Docker image: https://hub.docker.com/r/andreacorallo/emacs-nativecomp

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Thanks for the clarifications and suggestions. I would take a look at the data structure and code (just to see how exactly it's implemented) but I'm too occupied with other things right now. I'll check that native-comp. I'll close the issue for now and perhaps update if there's any new insight.

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