bug#23431: 25.0.93; EWW hangs

[Lars Ingebrigtsen]

Eli Zaretskii <eliz@gnu.org> writes:

>> From: Lars Ingebrigtsen <larsi@gnus.org>
>> Date: Tue, 03 May 2016 17:57:59 +0200
>> Cc: 23431@debbugs.gnu.org
>> 
>> First of all: Can the animation function determine that it's making
>> Emacs unresponsive?  I guess it could keep track of how much time is
>> passing between each time it's called, and if that's longer than the
>> timeout, it should ... postpone itself a bit further to allow some
>> keystrokes to get in between each frame?
>
> Can you show how that function is called on the Lisp level?

It's the `image-animate-timeout' function in image.el.

(defun image-animate-timeout (image n count time-elapsed limit)

[...]

           (delay (max (+ (* (or (cdr animation) image-default-frame-delay)
                             (/ 1.0 (abs speed)))
                          time (- (float-time)))
                       image-minimum-frame-delay))

[...]

      (unless done
        (run-with-timer delay nil 'image-animate-timeout
                        image n count time-elapsed limit)))))

So I think it shouldn't be too difficult to ... do something useful
here...

-- 
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   bloggy blog: http://lars.ingebrigtsen.no