145720 - repainting slowdown when hidden tabs have content loaded

Status: RESOLVED WORKSFORME

(SeaMonkey :: Tabbed Browser, defect)

Description

[Andreas Schrattenecker]

From Bugzilla Helper:
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.0rc3)
Gecko/20020518
BuildID:    mozilla RC2+ 2002051806

when you have more tabs open with content loaded, it slows down
repainting mozilla( i.e. resizing mozilla, resizing sidebar), although
only one tab is visible. im not talking about some % slowdown, but some
x00% slowdown. it looks like all hidden tabs are getting repainted too?
 

Reproducible: Always
Steps to Reproduce:
1. open http://www.mozilla.org/
2. open 4 empty tabs
3. go to first tab(www.mozilla.org loaded)
4. resize mozilla, resize sidebar (watch the speed mozilla gets repainted)
5. fill the 4 empty tabs with i.e.:
   http://bugzilla.mozilla.org/show_bug.cgi?id=108938
   http://bugzilla.mozilla.org/show_bug.cgi?id=138000
   http://bugzilla.mozilla.org/show_bug.cgi?id=134771
   http://bugzilla.mozilla.org/show_bug.cgi?id=143200
6. go to first tab(www.mozilla.org loaded)
7. when all tabs are loaded resize mozilla (sidebar) again

Actual Results:  repainting mozilla gets alot slower

Expected Results:  repainting should not decrease much

tested using:
windows 2000, SP2, mozilla RC2+ 2002051806, PIII@700MHz 
linux, suse 8.0, mozilla RC2, Athlon@800MHz

Comment 1

[Andreas Schrattenecker]

*** This bug has been confirmed by popular vote. ***

Comment 2

[Bohdan Linda]

I have the similar problem, after long intensive work(typycal a half day) with
tabs mozilla slows down. Only restart of mozilla help. I can't reproduce it.
Running with KDE 3.1. Culd not reporoduce above steps.

Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.4) Gecko/20030714 Debian/1.4-2

Comment 3

[Andreas Schrattenecker]

not reproducible anymore with firefox 1.0 (regardless how complex the pages are
loaded in hidden tabs, redraw is very fast for visible tab, as fast like when
other tabs woulndt have been loaded)

still reproducible with mozilla 1.7.3

tested using fedora core 3.

Comment 4

[Wayne Mery (:wsmwk)]

WFM - FF 1.5 and seamonkey using steps in comment 0