181620 - tiled, animated background image causes severe performance degradation

Status: VERIFIED DUPLICATE of bug 94828

(Firefox Build System :: General, defect)

Description

[Ben Andrews]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.2b) Gecko/20021029 Phoenix/0.4
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.2b) Gecko/20021029 Phoenix/0.4

In the page at http://www.geocities.com/rfwdg/Links.html, the tiled animated GIF
that serves as the background image causes a massive performance degradation,
making even navigating away from the page a difficult chore.  While this is
admittedly horrid web design - I would be perfectly happy if Mozilla rendered
this background as the first frame only as a workaround - other browsers seem to
handle it fine.  

Reproducible: Always

Steps to Reproduce:
1.  Visit http://www.geocities.com/rfwdg/Links.html in Phoenix 0.4
Actual Results:  
The web browser's performance degraded severely, causing even moving the mouse
pointer to be difficult.  It did not crash and recovery was possible by
navigating (slowly) to a new page.

Expected Results:  
Mozilla should either have rendered the animated GIF as a single frame (in fact,
since I had the preference set to "One" for frames to show of an animated GIF,
this was the expected behavior) or it should have operated at a normal rate of
speed.

Comment 1

[Sébastien Delahaye]

*** This bug has been marked as a duplicate of 94828 ***

Comment 2

[Simon Paquet [:sipaq]]

Mass verifying of old bugs.