Hosting your JS at Google
This only works if you’re using jQuery, prototype or another library that is supported by Google’s AJAX Librararies API.
This plugin makes use of said API, serving the files out from Google’s content distribution network. No matter how fast your hosting is, even with my super WordPress hosting and MaxCDN WordPress CDN setup I’m willing to bet that Google’s CDN is faster.
Don’t believe me? Here are 3 more reasons.