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

[Visuwesh]

[சனி ஜூலை 23, 2022] Gerd Möllmann wrote:

> Eli Zaretskii <eliz@gnu.org> writes:
>
>> And I've found a serious sink of CPU cycles under truncate-lines, and
>> installed a fix on the feature branch.  Gerd, if you have time to
>> eyeball the fix and comment on it, I'd appreciate.  It's commit
>> 350e97d on the branch.  (I can post a more detailed explanation of
>> what I did and why, if that would help, because the code and the
>> functions it calls are somewhat tricky.)
>
> I'll look at it and come back.
>
> BTW, does feature/long-lines-and-font-locking] build for you?  I'm getting
>
> In toplevel form:
> cedet/semantic/symref/list.el:35:2: Error: Wrong type argument: 
> number-or-marker-p, nil
> make[2]: *** [cedet/semantic/symref/list.elc] Error 1
> make[2]: *** Waiting for unfinished jobs....
> make[1]: *** [compile-main] Error 2
> make: *** [lisp] Error 2
>
> Configured --with-native-compilation.

I think Eli fixed it in the master branch in commit 
4a4fcf628e1e4c8db47cd62fa5617b662fa8b5d6.

https://git.savannah.gnu.org/cgit/emacs.git/commit/?id=4a4fcf628e1e4c8db47cd62fa5617b662fa8b5d6