[Webkit-unassigned] [Bug 94023] New: IndexedDB: Use ScriptValue instead of SerializedScriptValue when possible

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=94023

           Summary: IndexedDB: Use ScriptValue instead of
                    SerializedScriptValue when possible
           Product: WebKit
           Version: 523.x (Safari 3)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebCore Misc.
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: jsbell at chromium.org
                CC: oliver at apple.com, charles.wei at torchmobile.com.cn,
                    dgrogan at chromium.org, alecflett at chromium.org
            Blocks: 88287


The WebKit IDB implementation uses SerializedScriptValue throughout, which incurs overhead and complexity:

* Converting values to IDBKeys is port specific (e.g. v8/IDBBindingUtilities.cpp's createIDBKeyFromValue)
* When evaluating key paths, SSVs are deserialized in a script context, then the value is groveled over (port-specific)
* When injecting keys into values, SSVs are deserialized, the value is groveled over, then the object is reserialized

Ideally, the values would remain as ScriptValues rather than SerializedScriptValues until they are transmitted over the wire or persisted to storage. In the Chromium port, transmission between processes used to occur almost immediately, but code has moved into the front-end so there is now benefit to retaining the objects "live" for longer.

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