[Webkit-unassigned] [Bug 89635] New: NodeRareaData should be directly referred from Node instead of using HashMap

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=89635

           Summary: NodeRareaData should be directly referred from Node
                    instead of using HashMap
           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: morrita at google.com
                CC: darin at apple.com, koivisto at iki.fi, rniwa at webkit.org,
                    apavlov at chromium.org
            Blocks: 87034


Coined by Ryosuke, 
There is an observation that there is noticeable memory usage change even after haraken's 8 byte: http://trac.webkit.org/changeset/119802
because of some reasons like allocator fragmentation. This change is going to take back that bytes to put a pointer to NodeRareData.
Then we can kill the hashtable lookup when fetching it.

I understand this can be controversial. I'd like to hear your feedback.

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