bug#74281: 30.0.91; font-lock mode hangs on scrolling large Scheme file

[Eli Zaretskii]

> From: Stefan Monnier <monnier@iro.umontreal.ca>
> Cc: divya@subvertising.org,  74281@debbugs.gnu.org
> Date: Sun, 29 Dec 2024 15:01:49 -0500
> 
> This said, AFAICT this performance problem has been with us since
> Emacs-28 (commit cdadb7a97cbe), so it's not super urgent to fix it.
> I think we're fine with the fix on `master`.

Agreed.  We can later consider backporting to Emacs 30.2.

> It would be nice to get confirmation from Divya that it does fix the
> problem he sees.

Right.