[Webkit-unassigned] [Bug 122084] New: optimize jsarray setlength

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=122084

           Summary: optimize jsarray setlength
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: xinchao.peng at samsung.com


JSC Engine Optimize 'var ret =[] ; ret.length=1024' .When type of  ret is undefine and it   is setted length , its only public length is setted ,but its vector is not setted . the memory of variable ret is not changed .When the type of variable ret is confirm , its will allocate memory by public length.

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