Excellent video presentation on - Building High Performance Web Applications and Sites

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Head over to the Mix’09 videos to see an excellent video presentation by John Hrvatin on Building High Performance Web Applications and Sites. The video has some great tips on optimizing javascript used in many common scenarios, a demo of the new javascript profiler in IE8, and about how IE’s javascript engine resolves symbols (lookup chains) and to optimize accordingly. Also touched upon are the new IE8 features like the JSON helper methods,  querySelectorAll method among many others.

For instance, did you know you could optimize the code in the left screenshot using the one on the right ?

image  image

Head over and watch the video to learn many many more such tips.