bug#66117: 30.0.50; `find-buffer-visiting' is slow when opening large number of buffers

[Eli Zaretskii]

> From: Ihor Radchenko <yantar92@posteo.net>
> Cc: Eli Zaretskii <eliz@gnu.org>, dmitry@gutov.dev, 66117@debbugs.gnu.org,
>  mattias.engdegard@gmail.com
> Date: Fri, 15 Dec 2023 11:01:53 +0000
> 
> Stefan Monnier <monnier@iro.umontreal.ca> writes:
> 
> >> Do I understand correctly that what is needed to implement your
> >> suggestion is
> >>
> >> 1. Remove case_fold_search_ slot from buffer objects
> >> 2. Use DEFVAR_LISP for case-fold-search
> >> 3. Declare case-fold-search buffer-local
> >> 4. Replace BVAR(...) references in C with Vcase_fold_search
> >
> > Yes (assuming that 3 refers to the use of `make-variable-buffer-local`).
> 
> See the attached patch.

Thanks, but I wonder what, if anything, we should say about this
change in NEWS?  Also, do any of the manuals require any changes wrt
this?