[Webkit-unassigned] [Bug 103212] New: [Shadow] ShadowRoot should cache InsertionPoint list

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=103212

           Summary: [Shadow] ShadowRoot should cache InsertionPoint list
           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: shinyak at chromium.org
            Blocks: 103016


When distributing, we're currently traversing all descendant nodes in ShadowDOM.
If we cache InsertionPoint List, we can skip a lot of traversal.

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