$.each and JS 1.6's forEach

$.each and JS 1.6's forEach

I know that the Array.prototype.forEach method implementation and $.each differ in signature, but was this discussion ever raised here at the list to consider the performance boost? I think IE8, for example, has already implemented these newer JS methods, already... (I've not tested it yet, but will soon.)
Thanks!<br clear="all">
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Diogo Baeder
<a href="http://www.diogobaeder.com.br">http://www.diogobaeder.com.br</a>