[Webkit-unassigned] [Bug 129727] New: appendChild shouldn't invalidate LiveNodeLists and HTMLCollections if they don't have valid caches

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=129727

           Summary: appendChild shouldn't invalidate LiveNodeLists and
                    HTMLCollections if they don't have valid caches
           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: rniwa at webkit.org
                CC: koivisto at iki.fi, benjamin at webkit.org, akling at apple.com


Right now, invalidateNodeListAndCollectionCachesInAncestors invalidates node lists and HTML collections
on all ancestors whenever we're inserting or removing a node.

We don't have to do this when there are no node lists and HTML collections with valid caches.

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