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Re: profiling latency in large org-mode buffers (under both main & org-f

From: Max Nikulin
Subject: Re: profiling latency in large org-mode buffers (under both main & org-fold feature)
Date: Wed, 23 Feb 2022 23:03:41 +0700
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.5.0

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?

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