[Webkit-unassigned] [Bug 52370] New: Style sharing optimization no longer works on major web sites
bugzilla-daemon at webkit.org
bugzilla-daemon at webkit.org
Thu Jan 13 08:16:52 PST 2011
https://bugs.webkit.org/show_bug.cgi?id=52370
Summary: Style sharing optimization no longer works on major
web sites
Product: WebKit
Version: 528+ (Nightly build)
Platform: PC
OS/Version: Mac OS X 10.5
Status: NEW
Severity: Normal
Priority: P2
Component: CSS
AssignedTo: webkit-unassigned at lists.webkit.org
ReportedBy: koivisto at iki.fi
The code in CSSStyleSelector::locateSharedStyle() that tries to share style information between element has been defeated by widespread use of certain CSS selectors (:first-child pseudo class and similar). The current implementation disables the sharing optimization for the whole page if one of these constructs is seen in any style sheet used by the page.
This is currently preventing style sharing on basically all major sites: apple.com, nytimes.com, facebook.com, news.bbc.co.uk, engadget.com... all fail to do any sharing.
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