-moz-background-size property affects page scrolling speed (for fixed backgrounds)

RESOLVED WORKSFORME

Status

()

Core
Graphics
RESOLVED WORKSFORME
8 years ago
6 years ago

People

(Reporter: bobby van der sluis, Unassigned)

Tracking

Firefox Tracking Flags

(Not tracked)

Details

(URL)

(Reporter)

Description

8 years ago
User-Agent:       Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.6) Gecko/20100625 Firefox/3.6.6
Build Identifier: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.6) Gecko/20100625 Firefox/3.6.6

The -moz-background-size property affects page scrolling speed, even when using fixed backgrounds. Especially on lower-spec hardware lags and choppy delays are very noticeable.

Please follow the discussion on A List Apart:
http://www.alistapart.com/comments/supersize-that-background-please/P0/#10
http://www.alistapart.com/comments/supersize-that-background-please/P10/#15
http://www.alistapart.com/comments/supersize-that-background-please/P10/#20

Five examples are included in the article:
http://www.alistapart.com/articles/supersize-that-background-please/

Reproducible: Always

Steps to Reproduce:
1. Browse to http://www.alistapart.com/d/supersize-that-background-please/index4.html in Firefox 3.6.6 on Mac OSX/10.6.4 with a lower spec machine, like an old dual-core Intel Mac Mini
2. Use the scroll-wheel to scroll, see the noticeable difference in scrolling performance, compared with http://www.alistapart.com/d/supersize-that-background-please/index.html 
Actual Results:  
Slow scroll performance

Expected Results:  
Normal scroll performance

Comment 1

8 years ago
I can't really repro that on a now low-end 2007 dual core iMac (2007).

Roc, is that something your layer stuff will improve ?
Component: General → Graphics
Product: Firefox → Core
QA Contact: general → thebes

Comment 3

8 years ago
It might be helpful to check out ticket 583354. https://bugzilla.mozilla.org/show_bug.cgi?id=583354

It may/may not be the same issue, but it's much more evident while playing a flash video.

Try the html attachment in 3.6.8
This is looking pretty good on Fx4 for me. I didn't have a -too- low spec machine handy though, so please re-open if you're seeing this.
Status: UNCONFIRMED → RESOLVED
Last Resolved: 6 years ago
Resolution: --- → WORKSFORME
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