Re: Aborting display. Is this possible?

[Eli Zaretskii]

> From: Stefan Monnier <address@hidden>
> Cc: Alan Mackenzie <address@hidden>,  address@hidden
> Date: Mon, 20 Oct 2014 12:56:56 -0400
> 
> > If, after processing this single PageDown key, the input queue is
> > empty (as it is when you lean on the key, because Emacs finishes the
> > above processing in less time than the auto-repeat interval), Emacs
> > enters redisplay.
> 
> This is the case when processing the scroll-up-command takes less time
> than the repeat rate.

That's what I said, yes.

> > Now, what happens when you release the key?  The input queue is still
> > full of unprocessed PageDown keys.
> 
> If processing a single scroll-up-command takes less time than the repeat
> rate, the input queue should never have many unprocessed PageDown events
> (that's the whole reason why we check the input queue before entering
> redisplay).
> 
> So I still don't understand why we see this long delay when releasing
> the key.

Not every screenful needs the same time to redisplay.  There comes a
screen that needs more, and the queue is no longer empty.