135626 - CPU / mouse-cursor hog due to background image

Status: RESOLVED DUPLICATE of bug 102321

(Core :: Layout, defect, P2)

Description

[Markus Hübner]

When going to
http://www.central-soelden.at/menuehighlights.asp
and clicking on a link or just scrolling up or down mozilla becomes quite 
unusable as the cpu is hog.

Comment 1

[Markus Hübner]

Testing of caillon with latest build (20020403 on linux) worked for him.
So this is another win-only regression.

Comment 2

[Hogarth]

Confirmed that this does not happen under linux build # 2002040314.

Comment 3

[Matthias Versen [:Matti]]

wfm with an 1h old CVS build

Comment 4

[Joris Portegies Zwart]

WFM NT4.0 Build 20020402

Comment 5

[Markus Hübner]

With build 2002040503 on win-xp, 1.1ghz, 327ram and a fibre optic line this 
very annoying problem is still there. (also with same build on win2k).
When being in a different area than "highlights" and then clicking on the very
top on "hightlights" the mouse-cursor is frozen for nearly 2 seconds.

Also when switching to another application and then switching back to mozilla 
again this takes about 2 seconds longer than normally.

Comment 6

[Daniel Bratell]

No problem in my W2k build. Could it be Windows XP only?

Comment 7

[Peter Nilsson]

I can see the mouse-cursor hog on http://www.central-soelden.at/menuehighlights.asp

This page also causes the mouse freezes:
http://www.bernhard-auinger.com/saison/saison.html

I can see 2 - 3 mouse freezes everytime I reload the page or click on one of the
links to the left.

The cursor freezes just a short time but I think it's annoying.

Build ID: 2002040803
Win 2k

Comment 8

[Ian Neal]

I've done some testing on previous builds on Win XP/2K and the bug appears
between 2002030606 and 2002031309 as there is no lag on the former but there is
on the latter. Might be worth testing on 0.9.9 release to see if it the patch
that caused the problem made it into the branch or not.

Comment 9

[Kevin McCluskey (gone)]

nsbeta1-. Engineers are overloaded with higher priority bugs.

Comment 10

[Markus Hübner]

Tests with 0.9.9 worked perfectly.

Comment 11

[Pete Zha]

Attachment: With background image

Comment 12

[Pete Zha]

Seems like that background image cause this problem.

Comment 13

[Pete Zha]

Attachment: gif file from first URL

Comment 14

[Aaron Kaluszka]

This sounds like bug 87808.

Comment 15

[Markus Hübner]

But the testcase doesn't use any DHTML at all.

Comment 16

[Aaron Kaluszka]

bug 87808 is exacerbated by this

Comment 17

[Chris Waterson]

In comment #8, Ian notes that the regression occurred between 2002-03-06-06 and
2002-03-13-09 -- if someone could pull nightlies and narrow it down further
(say, to the day that it occurred), that would be extremely helpful. (Because
then we can look at the checkins in bonsai to see what caused it...)

Comment 18

[Aaron Kaluszka]

I'd like to note that this bug happens even with my Dual Athlon XP 1700+ and 1GB
DDR266 ECC RAM.  That's rather ridiculous.

Comment 19

[Aaron Kaluszka]

This happens on http://www.swva.net/.  It has a 1920 x 1 pixel background.  It
brings my previously mentioned machine to a halt for a few seconds.. causes
Winamp to stutter and stuff.  Do this only affect dimensionally long images? 
The size of the image in question is only 1.1kB.

Comment 20

[tor]

From the time period bracketed by comment #8, there's only one checkin to
gfx/src/windows - dcone's alpha blend and patblt changes.

http://bonsai.mozilla.org/cvsquery.cgi?treeid=default&module=all&branch=HEAD&branchtype=match&dir=mozilla%2Fgfx%2Fsrc%2Fwindows&file=&filetype=match&who=&whotype=match&sortby=Date&hours=2&date=explicit&mindate=3%2F3%2F2002&maxdate=3%2F14%2F2002&cvsroot=%2Fcvsroot

Comment 21

[Kevin McCluskey (gone)]

This may be fixed by the patch in bug 133261 which eliminates the use of the gdi
patblt call in favor of performing a progressive doubling algorithm into an
offscreen buffer for tiled background images. I can not duplicate the issue in
the bug or other tiled offscreen performance issues because my graphics card
seems to handle the gdi patblt call well while other cards seem to be "dog slow"
when patblt is used.

Comment 22

[Jacob Kjome]

Is this bug affecting this site too?
http://www.devx.com/

load devx.com and run your mouse over links and other stuff on that page.  It 
causes aweful cpu spikes and the page is absolutely sluggish in general. Try 
scrolling it.  Totally unusable.

Jake

Comment 23

[Markus Hübner]

Could this regression cause bug 139445 ?

Comment 24

[dcone (gone)]

*** This bug has been marked as a duplicate of 10234 ***

Comment 25

[dcone (gone)]

sorry.. wrong bug dupped against

Comment 26

[dcone (gone)]

this is a background tiling issue. Duplicate

*** This bug has been marked as a duplicate of 102321 ***