[eluser]mast3rpyr0[/eluser]
Do you mean CPU wise? Network? Easy of use? It took me 100ms in total to load jquery and jqueryUI, and both of those were in parallel with all other resources, so they werent taking extra time to load. Personally I like the look of jquery as opposed to straight javascript, it feels much cleaner. And when it comes to animating things there is no question that it is much better than standard javascript.