I've read a lot about how slow IE7/javascript is, but I thought I'd share this test.

I have a complex page with about 15 tables of class XYZ. I timed this:

    $('.XYZ').each(function(i){
    });

Vs this:

    $('TABLE').each(function(i){
    });

In IE7 the 1st one takes 1400ms, and the 2nd one takes 30ms.

Apparently searching the DOM by class name is horribly inefficient.

Just thought I'd share, since it took me a while to figure out this slowness...