Updates:
Owner: [email protected]
Cc: [email protected]
Comment #1 on issue 3842 by [email protected]: 5x regression in the
performance of dispatch table pattern
https://code.google.com/p/v8/issues/detail?id=3842
Thanks for the report.
Right now we indeed just use the generic stub for keyed loads, which
doesn't support fast loading of anything but array elements and direct
fields on the receiver.
We're thinking of replacing this with stub-cache use as you suggest as
well, but we'll have to measure the impact.
(To be honest I think we've never probed the megamorphic stub cache. Keyed
loads have their own cache that only handles fields for as long as I can
remember... Maybe KeyedCallIC used to do something different.)
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