[Webkit-unassigned] [Bug 119865] New: Parent pointer and shadow root host pointer should not be shared

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=119865

           Summary: Parent pointer and shadow root host pointer should not
                    be shared
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: HTML DOM
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: koivisto at iki.fi


Node::m_parentOrShadowHostNode is currently used both as the parent pointer for regular nodes and as the host pointer for ShadowRoots. This is confusing. It is also slow as it introduces a branch to all code paths that want to traverse element ancestors. It is especially important in selector matching.

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