I still feel fairly new to jQuery and javascript -- after almost a year! -- and have been experimenting with several different coding styles for plug-ins. Lately I've been curious about the difference in performance between using local variables vs. instance variables for storing state. JSLitmus, while not itself jQuery-based, has just given me the answers I've been looking for -- and I found them a bit surprising:
<a href='http://www.fatdog.com/litmus_tests/ InstanceVsLocalTest.html'>Litmus Tests</a> (Apologies for the color scheme! :-) Howard