[Webkit-unassigned] [Bug 215974] Check whether the iterator is callable in spread

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=215974

--- Comment #26 from Alexey Shvayka <shvaikalesh at gmail.com> ---
(In reply to Saam Barati from comment #25)
> Do these extra checks cost us any perf?

No, the checks themselves are quick and, more importantly, they are on the slow path (!isJSArray) of the slow paths (slow_path_spread, operationSpreadGeneric).

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