Re: Emacs design and architecture. How about copy-on-write?

[Eli Zaretskii]

> Date: Wed, 20 Sep 2023 22:39:47 +0300
> Cc: yantar92@posteo.net, acm@muc.de, incal@dataswamp.org, emacs-devel@gnu.org
> From: Dmitry Gutov <dmitry@gutov.dev>
> 
> - The "snazzy" mode-line packages sometimes slow things down more than 
> expected.

Why shouldn't this be considered part of our problem with redisplay?
Emacs isn't supposed to be fast enough only in "emacs -Q".