bug#59935: 29.0.60; project-list-buffers is slow

[Eli Zaretskii]

> Cc: 59935@debbugs.gnu.org
> From: Juri Linkov <juri@linkov.net>
> Date: Sun, 11 Dec 2022 19:07:27 +0200
> 
> > Do you have the time to finish the fix yourself? It was your feature, after
> > all.
> 
> Here is a complete patch tested for all possible cases:
> - emacs 28/29
> - with/without file arg
> - with/without reverting

Thanks, but I hope you don't intend to ask to install this on the
release branch.  And changing back the signature of
list-buffers-noselect is extremely problematic, even though we changed
it only for Emacs 29.

Please try to find a safer, more compatible solution.