What's the fastest way to select child elements?

What's the fastest way to select child elements?

Hi,
Let's say I want to select all the input elements of a particular form with id #form. What would be faster?

1. $("#form input")

or

2. $("input", "#form")

In my (rather unscientific) test using firebug, 2 seemed to be almost 50% faster.

Regards,
Maarten