On 3/10/11 9:00 PM, Charles Kendrick wrote:
People use Objects as classes, instances, "associative arrays" / Maps, etc. Numeric keys are a tiny minority and there would be no measurable performance gains for special treatment of such keys *on Object*.
You may want to read <https://bugzilla.mozilla.org/show_bug.cgi?id=594655> and <https://bugzilla.mozilla.org/show_bug.cgi?id=611423>. People are running into performance issues due to lack of such special treatment today.
Now maybe these people are just doing dumb things they shouldn't be doing, but that doesn't make the performance differences observed on those tests "not measurable".
However because frameworks have to deal with all possible keys, we end up with a much, much more expensive data structure that has to be used just because numeric keys are being treated specially.
I agree this is an issue. I just think you're underestimating the performance drag of preserving numeric property order for vanilla Objects.
-Boris _______________________________________________ es-discuss mailing list [email protected] https://mail.mozilla.org/listinfo/es-discuss
