[Webkit-unassigned] [Bug 119417] New: Use JITPropertyAccess to speed up access to JSCallbackObject's static value

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=119417

           Summary: Use JITPropertyAccess to speed up access to
                    JSCallbackObject's static value
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: max.hong.shen at gmail.com


Created an attachment (id=207970)
 --> (https://bugs.webkit.org/attachment.cgi?id=207970&action=review)
Test case

To access to JSCallbackObject's static value, JSC API needs to call JSCallbackObject::getOwnPropertySlot() first, then invokes the JSCallbackObject::getStaticValue(). The work done in getOwnPropertySlot() could be saved if we can use Baseline JIT stub (op_get_by_id_custom_stub) to call getStaticValue() directly when Baseline JIT kicks in (e.g. property access in a loop which takes 100 times). It surely can speed up the client applications that need heavy property accesses in their code. (e.g. a game app's draw function).

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