This seems to once again miss the point. The main point of a CDN is to speed up delivery of content. Having all of these different CDNs only increases the time it takes because you are adding in more DNS queries to the client and on top of that they are adding HTTPs support which even further increases load time because of the "handshake" that goes on. That being said, if this CDN is the only one you are using then great, that works out fine. But a CDN dedicated to only Javascript just seems kind of silly other than for passing aound example HTML files for how to code something.<p>EDIT: Also another pitfall is that you can't compress all your JS into one big JS file saving time on requests too.