[Webkit-unassigned] [Bug 152710] New: Subclassing builtins should create a new structure and cache it rather than transitioning.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=152710

            Bug ID: 152710
           Summary: Subclassing builtins should create a new structure and
                    cache it rather than transitioning.
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: keith_miller at apple.com

We should not transition the structure each time we want to make a structure with a non-BuiltinConstructor.prototype prototype. Instead we should make a new structure and cache it for next time.

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