Updates:
        Status: Assigned
        Owner: [email protected]
        Cc: [email protected]
        Labels: Type-Bug Priority-Medium HW-All OS-All Harmony Area-Language

Comment #1 on issue 4246 by [email protected]: Computed Property Names up to 25x slower than ES5 equivalent
https://code.google.com/p/v8/issues/detail?id=4246

Thanks for the report.

Your test is flawed. You need to use defineOwnProperty to ensure setters on the prototype chain are not invoked.

Still. We do not support computed property names in Crankshaft. We support them in Turbofan but TF is not turned on yet. Even when TF is used there is room for improvements since we use runtime calls for adding the properties for the computed property names.

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