Subject: Re: bug#56682: Fix the long lines font locking related slowdowns

From: Gregory Heytings <[email-masked]>
Date: Tue, 26 Jul 2022 11:53:28 +0000

>> Hmmm...  After 350e97d78e, Isearch locks Emacs with 
>> toggle-truncate-lines. Recipe:
>>
>> C-x C-f long-line.xml
>> C-x x t
>> C-s </
>>
>> You have to kill Emacs, C-g does not work.
>
> I see the same on master, where that change is not yet installed.
>

Are you sure?  I don't see the same at 304e2a3a05.  C-s is slow, but it 
does not hang Emacs, and the effect of C-s </ is visible within a couple 
of seconds.