67470 - On linux if a page has an animated gif with a high update rate, looping javascript code stops running

Status: VERIFIED FIXED

(Core :: DOM: Core & HTML, defect)

Description

[Scott Kester]

From Bugzilla Helper:
User-Agent: Mozilla/5.0 (X11; U; Linux 2.2.16-22 i686; en-US; m18) Gecko/20010201
BuildID:    2001020108

On linux if a page has an animated gif with a high update rate, looping
javascript code stops running.  However if you move the mouse over the page, the
javascript loop executes as long as you are moving the mouse.  I have created a
test page at the URL above.  The same test page works fine on the Windows(NT)
version of Mozilla.

Reproducible: Always
Steps to Reproduce:
Visit page with animated gif, and looping javascript.

Actual Results:  Gif is animated, javascript does not loop, or loops VERY slowly.

Expected Results:  Both gif and javascript should both execute.

This problem did not reproduce on Windows NT, it appears to be Linux specific.

Comment 1

[Phil Schwartau]

Using Mozilla binaries 20010201xx on Linux, WinNT, 20010126xx on Mac.
Confirming bug. I get very different looping speeds in each case:


WinNT: The text moves to the left quite quickly. Moving mouse has no effect.
Mac:   The text moves, but haltingly. Again, moving the mouse has no effect.
Linux: The text moves INCREDIBLY slowly. Moving the mouse speeds it up!


I have no good idea on what component this belongs to, but it's definitely
not JS Engine. Reassigning to DOM Level 0 for further triage -  

Comment 2

[Johnny Stenback (:jst)]

Sounds liek an animated-gif-timer-prioirity problem, I talked to Pavlov and he
agreed to look into this in libpr0n :-)

Comment 3

[R.K.Aa.]

sounds like a dup of bug 35819 "Animated gifs animate faster if you move the
mouse pointer around."

Comment 4

[R.K.Aa.]

err... does NOT sounds like a dup.  (didn't notice it was the js that was
speeding on move)

Comment 5

[Scott Kester]

On build 2001041808 this appears to be fixed.  Perhaps something in libprOn has
corrected the problem?  New animated gif timming?  The animation of the add is
much slower now.  Anyway, the scrolling java text now scrolls correctly on the
test case URL.

Comment 6

[Scott Kester]

Closing this out as fixed.

Comment 7

[Prashant Desale]

Accroding to reporter. Verified.