Subject: bug#64391: buffer narrowing slowdown regression in emacs 29

From: Eli Zaretskii <[email-masked]>
Date: Fri, 07 Jul 2023 13:27:59 +0300

> From: Mattias Engdegård <[email-masked]>
> Date: Fri, 7 Jul 2023 11:30:11 +0200
> Cc: Eli Zaretskii <[email-masked]>,
>  [email-masked],
>  [email-masked],
>  [email-masked]
> 
> Gregory's first two patches and mine are indeed equivalent up to refactoring; either would do. The moving parts are the same, so performance shouldn't differ noticeably. Neither appears to tie our hands for future changes as the interfaces are all internal.

I was considering applying only the first of Gregory's patches,
without the second.  WDYT?