Dave Ward just posted the great article, 11 keystrokes that made my jQuery selector run 10x faster.
If you are using jQuery in your web application, I highly recommend that you read this article and learn how to ensure that your jQuery selectors are running as fast as possible. Dave also includes some good hard data on the JavaScript performance differences between the older browsers: IE 7 & FireFox 3.0 as compared to the newer generation browsers like IE 8, FireFox 3.4 and Google Chrome.
