Re: profiling latency in large org-mode buffers (under both main & org-fold feature)

[Max Nikulin]

On 22/02/2022 12:33, Ihor Radchenko wrote:
> I am wondering if many people in the list experience latency issues.

Ihor, it is unlikely the feedback that you would like to get concerning 
the following patch:

Ihor Radchenko. [PATCH 01/35] Add org-fold-core: new folding engine.
Sat, 29 Jan 2022 19:37:53 +0800. 
https://list.orgmode.org/74cd7fc06a4540b1d63d1e7f9f2542f83e1eaaae.1643454545.git.yantar92@gmail.com

but my question may be more appropriate in this thread. I noticed the 
following:

> +;; the same purpose.  Overlays are implemented with O(n) complexity in
> +;; Emacs (as for 2021-03-11).  It means that any attempt to move
> +;; through hidden text in a file with many invisible overlays will
> +;; require time scaling with the number of folded regions (the problem
> +;; Overlays note of the manual warns about).  For curious, historical
> +;; reasons why overlays are not efficient can be found in
> +;; https://www.jwz.org/doc/lemacs.html.

The linked document consists of a lot of messages. Could you, please, 
provide more specific location within the rather long page?