Subject: RE: [External] : bug#58342: 29.0.50; noverlay branch is O(N) for important calls

From: Matt Armstrong <[email-masked]>
Date: Sat, 08 Oct 2022 16:08:36 -0700

Drew Adams <[email-masked]> writes:

>> For the potential performance problem with next-overlay-change to appear
>> you need overlays to overlap, so not something like linum or nhexl-mode.
>
> Which is why I mentioned zones.el.
>
> And I don't expect it to be alone in this.
> Overlays can be anywhere.

For what it is worth, the use cases where this bug applies are likely to
be noticeably slow in Emacs today as well.