29362 - Performance and display problems when resizing Tinderbox page

Status: VERIFIED WORKSFORME

(Core :: Layout: Tables, defect, P3)

Description

[Pierre Saslawsky]

Tested with recent debug builds on Mac and Windows.

- Go to the Tinderbox page.
- Resize the window so that it shows the horizontal scroll bar. The height of the 
window doesn't matter but it's more impressive if you make the window small 
enough to not display any part of the table (just the blah-blah at the top).
- Now keep resizing the window continuously doing circles of about 1 inch wide 
with the mouse cursor.
==> You see that the window is updated fast enough to keep track with the cursor 
movements.
- Resize the window wider so that the horizontal scroll bar disappears.
- Resize continuously in small circles like above.
==> You see that the window refresh is MUCH slower.

The performance drop is certainly due to the big table. The odd things are:
- It happens even if only the top of the page is visible (not the table itself).
- When a part of the table is visible with all the columns (ie. no horizontal 
scrollbar), the space between the columns is not calculated consistently: some 
columns have no white line between them, some have two white lines.

Comment 1

[karnaze (gone)]

There is a known performance problem with tables. They repaint themselves 
entirely no matter what the size of the damage area.

Comment 2

[Bernd Mielke]

The drawing problem duplicates bug 27529

Comment 3

[leger]

Adding perf keyword

Comment 4

[karnaze (gone)]

Marking mozilla0.9.

Comment 5

[karnaze (gone)]

Moving to mozilla0.8.1

Comment 6

[karnaze (gone)]

Moving to mozilla0.9

Comment 7

[Amarendra Hanumanula]

QA contact update

Comment 8

[karnaze (gone)]

I'm not seeing the slowdown with the horizontal scroll bar removed on WinNT. 
Marking worksforme.

Comment 9

[Amarendra Hanumanula]

 Marking verified