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

[Eli Zaretskii]

> From: Ihor Radchenko <yantar92@posteo.net>
> Cc: Dmitry Gutov <dmitry@gutov.dev>, luangruo@yahoo.com, acm@muc.de,
>  incal@dataswamp.org, emacs-devel@gnu.org
> Date: Fri, 22 Sep 2023 10:28:23 +0000
> 
> What about "quick-and-dirty" layout being "empty" window that is also
> blocked for user interaction. (I am assuming that redisplay is
> asynchronous here). Then, the user will be blocked from interacting
> with a single problematic window being redisplayed, but could still work
> with other windows/buffers without waiting for Emacs to "unhang".

You will need to describe in more detail what you mean by "user
interaction with a window".  In Emacs, users don't interact with
windows, they interact with Emacs.  Did you mean that such a window
should not be the selected one?  If so, does it mean Emacs should make
another window to be the selected one if the selected one takes too
long to display?  If that is what you mean, I'm not sure users will
like that.  For example, touch typists could be tricked into modifying
a completely different buffer in this way.