bug#22846: 25.0.91; Long pauses viewing HTML email; can we show progress?

[Eli Zaretskii]

> From: Lars Ingebrigtsen <larsi@gnus.org>
> Date: Mon, 29 Feb 2016 18:19:55 +1100
> 
> Hm...  didn't we add a mechanism to display messages on a timeout the
> other year?  Or did we just talk about it?  I wanted something like
> 
> (with-timeout-message 2 "We're doing whatevs"
>   (whatevs))
> 
> If the body form completes within 2 seconds, then nothing is displayed,
> otherwise the message is displayed until the body form completes.
> 
> I can't find it now, so we probably just talked about it?

Are you talking about delayed-warnings-list, delayed-warnings-hook,
and display-delayed-warnings?