Bug 73238 - REGRESSION (r101202): Incredibly poor scrolling performance on WebKit Bugzilla bug list page
Summary: REGRESSION (r101202): Incredibly poor scrolling performance on WebKit Bugzill...
Status: RESOLVED FIXED
Alias: None
Product: WebKit
Classification: Unclassified
Component: Layout and Rendering (show other bugs)
Version: 528+ (Nightly build)
Hardware: Unspecified Unspecified
: P1 Normal
Assignee: Nobody
URL: http://webkit.org/new-bugs/3d
Keywords: InRadar, Regression
Depends on:
Blocks:
 
Reported: 2011-11-28 12:30 PST by Mark Rowe (bdash)
Modified: 2011-11-28 15:24 PST (History)
8 users (show)

See Also:

Attachments
Sample (724.38 KB, text/plain)
2011-11-28 12:41 PST, Simon Fraser (smfr) 		no flags Details
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Description Mark Rowe (bdash) 2011-11-28 12:30:43 PST 
After r101202 I’m seeing the WebKit Bugzilla new bugs list at <http://webkit.org/new-bugs/3d> scroll at perhaps three or four frames per second. Prior to that revision the page scrolled at around 40fps. A sample shows that almost all of the time is being spent below RenderTable::paint, with most of that inside RenderTableCell::paintCollapsedBorder.

A related side-effect is that when switching to a tab containing <http://webkit.org/new-bugs/3d> I often see it flicker blank before the contents appear.
Comment 1 Radar WebKit Bug Importer 2011-11-28 12:31:19 PST 
<rdar://problem/10492343>
Comment 2 Mark Rowe (bdash) 2011-11-28 12:31:59 PST 
r101202 was for bug 71244.
Comment 3 Simon Fraser (smfr) 2011-11-28 12:41:05 PST 
Created attachment 116800 [details]
Sample
Comment 4 Robert Hogan 2011-11-28 15:24:46 PST 
Rolled out in http://trac.webkit.org/changeset/101292