title: Good ways to improve jQuery selector performance?
body: <p>I'm looking for any way that I can improve the selector performance of a jQuery call.  Specifically things like this:</p>
  
  <p>Is <code>$("div.myclass")</code> faster than <code>$(".myclass")</code></p>
  
  <p>I would think it might be, but I don't know if jQuery is smart enough to limit the search by tag name first, etc.  Anyone have any ideas for how to formulate a jQuery selector string for best performance?</p>