Bug 37214

Summary: poor scrolling performance with multiple backgrounds
Product: WebKit Reporter: Paul Irish <paulirish>
Component: Layout and RenderingAssignee: Nobody <webkit-unassigned>
Severity: Normal CC: simon.fraser
Priority: P2 Keywords: InRadar
Version: 528+ (Nightly build)   
Hardware: All   
OS: All   
URL: http://css3exp.com/moon/

Description Paul Irish 2010-04-07 08:59:55 PDT
http://css3exp.com/moon/ has 4 background images set on the body element.

Scrolling the page (via mousewheel) reveals very poor performance.
When the backgrounds are disabled, scrolling performance returns to normal.

Tested in Chrome, Safari and nightly webkit on XP and OS X 10.5
Comment 1 Sam Weinig 2010-04-08 19:39:06 PDT
Comment 2 Simon Fraser (smfr) 2013-09-10 14:54:28 PDT
Tiled scrolling with fixed backgrounds made this fast.