I'm looking to improve performance as much as possible. Recently we upgraded the server from an anthlon II processor to an i7 950 with 8GB ram and updated PHP. There is a choice for the jQuery source; local, Google Ajax API CDN, Microsoft CDN, JQuery CDN. Which would probably work better in this scenario? I've got blazing fast internet so noticing the difference is a little difficult for me, however in regards to technical aspects, I'm sure someone can answer.