Updates:
Cc: [email protected] [email protected] [email protected]
Comment #1 on issue 2743 by [email protected]: `in` operator performance
http://code.google.com/p/v8/issues/detail?id=2743
This is starting to hurt us too. We need to do a hasOwnProperty check but
it turned out to be the most time consuming function in our entire code
base, leading us to have to do complex workarounds.
`in` makes all the array extras methods unnecessary slow as well.
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