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bug#23431: 25.0.93; EWW hangs

From: Eli Zaretskii
Subject: bug#23431: 25.0.93; EWW hangs
Date: Wed, 04 May 2016 05:34:28 +0300

> From: Lars Ingebrigtsen <address@hidden>
> Cc: address@hidden,  address@hidden,  address@hidden
> Date: Tue, 03 May 2016 21:37:42 +0200
> Eli Zaretskii <address@hidden> writes:
> > Btw, if I wait for a while (maybe 20 sec), the slowness disappears,
> > and Emacs becomes responsive again, although the animation still goes
> > on.  So perhaps what causes this is some initial processing?  (I have
> > no idea what's involved in displaying an animated GIF.)
> After Emacs has decoded all the frames in the image, they'll then be
> stored in the Emacs display image cache (the one you can clear with
> `clear-image-cache'), so Emacs should be responsive after the animated
> GIF has looped once.  (Unless there are more frames in the image than
> the length of the Emacs image cache.)

Which means that the heavy part is decoding, and not redisplay.

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