"has" problem - speed...

".has('ul')" is much much much slower than ".filter(':has(ul)')". This seems counterintuitive.

I've only tested this in IE7 and chrome, and the issue is much more pronounced in IE7.

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==IE7==

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3.313 seconds -- $li.has("ul");

0.281 seconds -- $li.filter(":has(ul)");

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==Chrome==

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0.152 seconds -- $li.has("ul");

0.043 seconds -- $li.filter(":has(ul)");

Jquery version 1.4.2

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