Now with every new version of a Framework that comes out, this argument comes up again and again. Finally, we have something to put the arguments to rest.
In my personal testing, I've found that JQuery 1.21 leads the pack, but only in Internet Explorer. In Firefox it comes in dead last. Does this discourage me? Maybe a lil’ bit. Am I going to stop using JQuery and switch to Prototype? I think not.
What Do You Need?
For this I don't think I should suffer the 120 KB that Prototype has to offer, even though it's blazing fast in Firefox. With that said, even if I hate Internet Explorer, it is still, by far, the most popular browser out there. So I take comfort in the fact that the majority of my audience is getting the speed benefits of JQuery.