Status: Accepted
Owner: ----
Labels: Type-FeatureRequest Priority-Medium
New issue 3163 by [email protected]: Consider probing keyed_lookup_cache
in hasOwnProperty.
http://code.google.com/p/v8/issues/detail?id=3163
Generic KeyedLoadIC stub has a cache mapping pair (map x property-name) to
in-object property offset. This cache considerably speeds up fast path of
the x[k] expression when k is existing in-object property on the fast
object.
Right now hasOwnProperty always calls into runtime, while in fact it could
first probe/populate the very same cache. This would improve fast path
performance for the hasOwnProperty.
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