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: monnier@iro.umontreal.ca, dmitry@gutov.dev, 66117@debbugs.gnu.org
> Date: Sat, 23 Dec 2023 14:30:42 +0000
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> >> I do not mind adding tests, but it will not be as fast - I need help
> >> with them.
> >
> > We could install just a few now, and the rest afterwards.  You have
> > already presented enough non-trivial cases that can be easily
> > converted to tests, and I think it is a good idea to do that when we
> > change such low-level and veteran code.
> 
> See the attached.
> I am not sure if these few cases are enough to warrant a separate commit
> though.

I installed it, thanks.