28578 - Attached background image causes extremely slow page drawing

Status: VERIFIED FIXED

(Core :: Layout, defect, P3)

Description

[old account]

The attached background image causes the page to layout EXTREMELY slowly. 
Scrolling the page makes the browser become nearly nonresponsive.

Comment 1

[old account]

Attachment: Background image file that causes this problem

Comment 2

[old account]

Attachment: Test page using this background image

Comment 3

[troy]

Reassigning to dcone

Comment 4

[dcone (gone)]

I looked at this on windows.. and the tiling is using the optimized code..
takes the blitting from 300 to about 12 blits.  Seems to be very responsive on 
my windows machine. The Tile is 3 by 6048 pixels.  It seems to be working as 
designed.. maybee there is something strange happening on Linux. Pav can you 
look at this and make sure it going thru the optimized code.  Everything looks 
good to me (on NT and Mac for sure).  The only thing I could imagine is that 
blitting large bitmaps are slower on Linux.. maybee a clipping issue.. not sure.
Also.. the attachment did not work. I downloaded the background image and made 
my own page to test this.  I could see the html from the last attachment, but 
the background did not load.  This could also be a problem downloading the 
image.. I dealt with a bug a while ago that said backgrounds were slow.. it 
ended up being slow loads from the server where the image came from.

Comment 5

[old account]

I probably should have made the attached test page use the attached background
image's URL instead of using the relative URL "classback.gif".  I'm almost
positive this is not a slow load from the server because I can reproduce with
all of the files on my hard drive.

Comment 6

[Peter Trudelle]

Mass moving M17 bugs to M18

Comment 7

[Stuart Parmenter]

fixed

Comment 8

[Chris Petersen]

Fixed in the May 22 Linux build (2000052208).