Hello! I write regularly in a massive org file ~160 000 lines, and experience progressive slowdowns as the buffer remains open when I have the setting `(setq org-fold-core-style 'text-properties)`.
When the file is first opened, all operations are very fast. But as I keep using, it keeps slowing down and eventually slows to a crawl where typing a single character takes several seconds. However, after closing the buffer and opening the file up again, the speed returns to normal. With `(setq org-fold-core-style 'overlays)` in my `early-init.el`, I have no slowdown issue related to org-fold over time. Running the CPU profiler while typing a few characters in the buffer yields me this report: ``` 17969 99% - command-execute 17969 99% - funcall-interactively 17956 99% - org-self-insert-command 17940 99% - org-fold-core--fix-folded-region 178 0% - org-fold-core-next-folding-state-change 177 0% #<compiled 0x72c2e0e7737b768> 42 0% - org-fold-core-get-region-at-point 1 0% org-fold-core--property-symbol-get-create 21 0% - org-fold--reveal-outline-maybe 18 0% - org-fold--reveal-headline-at-point 16 0% - org-end-of-subtree 9 0% - org-back-to-heading-or-point-min 8 0% - org-before-first-heading-p 8 0% org-element-at-point 1 0% org-back-to-heading 6 0% org-element-at-point 2 0% - rx-to-string 2 0% - rx--translate 2 0% - rx--translate-form 1 0% - rx--translate-or 1 0% mapcan 1 0% - org-fold-core-get-folding-spec 1 0% org-fold-core--property-symbol-get-create 1 0% - org-fold-core-region-folded-p 1 0% - org-fold-core-get-folding-spec 1 0% org-fold-core-get-folding-spec-from-alias 1 0% #<compiled 0x1e4c54b2bcafef> 1 0% - #<lambda 0x1e33d5fbace2c> 1 0% let 1 0% - org-element--cache-after-change 1 0% - org-element--cache-submit-request 1 0% org-element--cache-sync 3 0% - my/system-hydra/profiler-stop-and-exit 3 0% - hydra--call-interactively-remap-maybe 3 0% funcall-interactively 3 0% - evil-normal-state 1 0% - evil-change-state 1 0% evil-insert-state 3 0% - my/system-hydra/profiler-report-and-exit 2 0% - hydra--call-interactively-remap-maybe 2 0% funcall-interactively 1 0% - hydra-keyboard-quit 1 0% - #<compiled 0x19801059c7c2> 1 0% - message 1 0% - apply 1 0% mini-modeline--reroute-msg 1 0% - evil-previous-line 1 0% - evil-line-move 1 0% line-move 1 0% - my/system-hydra/body 1 0% - my/hydra-pre-cursor 1 0% evil-set-cursor-color ``` The memory profiler reports nothing significant. It appears `org-fold-core--fix-folded-region` is what's taking all the cycles. What's the best way for me to proceed debugging this? Setup: `GNU Emacs 30.0.50 (build 1, x86_64-pc-linux-gnu, X toolkit, cairo version 1.16.0, Xaw3d scroll bars)` `Org mode version 9.6.6 (release_9.6.6 @ /nix/store/q8adc2srnbipkahbwffwg006d09yk02g-emacs-git-20230618.0/share/emacs/30.0.50/lisp/org/)` Thanks! Sebastian
