[Webkit-unassigned] [Bug 233959] New: Add DOMStructures

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=233959

            Bug ID: 233959
           Summary: Add DOMStructures
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: DOM
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: ysuzuki at apple.com

We should have the same mechanism to DOMConstructors: DOMStructures array.
Now, we have significantly better / faster StructureID implementation. And WriteBarrierStructureID (sizeof(WriteBarrierStructureID) is 4!) is coming.
We should have std::array<WriteBarrierStructureID, numberOfStructures> instead of HashMap<ClassInfo*, WriteBarrier<Structure>>, which is faster. And maybe it is more compact (HashMap allocates roughly 4x memory usually, we do not need to have ClassInfo*, and we do not need to hold Structure*).

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