Subject: Re: bug#56682: locked narrowing

From: Gregory Heytings <[email-masked]>
Date: Fri, 02 Dec 2022 08:08:01 +0000

>
> Once again, there's absolutely no reason to scan more than a limited 
> region around point where redisplay is likely to look.
>

That's correct if, and only if, we do that scan each time redisplay is 
called.  If we do that only from time to time, based on some heuristics, 
it is not correct anymore, as I explained repeatedly.