Use a Content Delivery Network

This is not an easy task or feasible thing for small websites. Big websites that get visitors from all over the world can benefit a lot from a CDN network. Amazon for example offers a simple to use and pretty cheap CDN called Cloudfront, i use it for this blog to host my static files like javascript and css. Another big name in this business is cloudflare.

A cheap way to get your Libraries from a CDN is the google CDN that offers a wider range of different libraries.

The first advantage of using a CDN is that your static files like images, javascript and css files get delivered from a server near the users access point and the second big advantage is that the content gets delivered from a different domain as your own. Files on different domains can be downloaded by the client (your browser) in parallel to other files from your main domain.