What's the Fastest Way to Code a Loop in Javascript?

Given the amount of work that has gone into optimizing Javascript speed in browsers during the past two years, I'd say these results are completely obsolete.

So, anyone have results for browsers that were released within the past 2 years?

What surprises me is are some of the results like this:<p><pre><code> IE 7.0.5730.11 / WinXP SP2 Native Array (length=1000, looped 100 times) </code></pre> While loop in reverse, simplifying the test condition.<p><pre><code> var i = arr.length; while (i--) {} </code></pre> Took <i>0ms</i> to execute... very unexpected

Some very interesting results -- I didn't expect the while loop in reverse to be so fast, and this is consistent across browsers.<p>The presentation needs work, though. Would some charts be so difficult to make? Much easier to compare results that way.<p>edit: note this post is from 2008.

I personally always (when applicable, of course) go with a reversed while-loop, because of its neat and tidy nature, and being "easy on the eye".

Using emacs :-)