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bug#23431: 25.0.93; EWW hangs

From: Lars Ingebrigtsen
Subject: bug#23431: 25.0.93; EWW hangs
Date: Tue, 03 May 2016 19:04:21 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/25.1.50 (gnu/linux)

Eli Zaretskii <address@hidden> writes:

> So you are saying that a single call to image-animate-timeout takes
> much longer than the value of 'delay'?

Well, `image-animate-timeout' doesn't really do much, but if the next
timeout arrives much later than `delay' specified, then we can surmise
that displaying the next image in the sequence took a lot of time.

Most parts of the image formatting doesn't happen until redisplay
happens -- `image-animate-timeout' just increases the image index, and
then redisplay does all the hard lifting.

While redisplay is doing all that, Emacs isn't allowing any events to
fire, I think, so we should be able to see that Emacs is busy...

> (Which is what typically, btw?)

I think for most GIFs it's typically 0.1s, but it can be larger.

(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

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