[Webkit-unassigned] [Bug 131462] New: Spread operator performance in pure array concatenation should be closer to Array.prototype.concat

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=131462

           Summary: Spread operator performance in pure array
                    concatenation should be closer to
                    Array.prototype.concat
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: joepeck at webkit.org
                CC: oliver at apple.com


Created an attachment (id=228995)
 --> (https://bugs.webkit.org/attachment.cgi?id=228995&action=review)
[TEST] Test Case

Comparing the performance of:

    var combined = [...arr1, ...arr2];
    var combined = arr1.concat(arr2);

The concat is faster then the spread. They should be closer in performance considering they produce the same result.

See attached test case.

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