[Webkit-unassigned] [Bug 75069] New: Make elements with attributes smaller by eliminating the m_element back pointer in NamedNodeMap

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=75069

           Summary: Make elements with attributes smaller by eliminating
                    the m_element back pointer in NamedNodeMap
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: XML DOM
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: darin at apple.com
                CC: rniwa at webkit.org, adamk at chromium.org


The back pointer from the heap-allocated vector of attributes to the element is a waste of space. We should move the data from the current NamedNodeMap class into a new heap-allocated class that is independent of the DOM.

The NamedNodeMap class should then just be a class with an Element* in it. The pointer to NamedNodeMap could go into ElementRareData or some other map, and all the operations could be done based on data stored in the element and its data structures. NamedNodeMap would no longer have any data of its own.

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