Bug 37214

Summary:	poor scrolling performance with multiple backgrounds
Product:	WebKit	Reporter:	Paul Irish <paulirish>
Component:	Layout and Rendering	Assignee:	Nobody <webkit-unassigned>
Status:	RESOLVED FIXED
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

<rdar://problem/7844080>

Comment 2 Simon Fraser (smfr) 2013-09-10 14:54:28 PDT

Tiled scrolling with fixed backgrounds made this fast.