Railgun's an interesting idea but unfortunately the post doesn't really give us enough information to really judge it's effectiveness. For example we don't kno

Railgun's an interesting idea but unfortunately the post doesn't really give us enough information to really judge it's effectiveness. For example we don't know enough about the 'test' environment such as how much the pages vary from user to user, or from page to page which will have a large impact on deltas. There's also no detail on how other optimisations might perform e.g. serving all dynamic content through CDN so reusing CDN to origin connections, whether it might be possible to specify cache lifetimes for the dynamic pages etc. There's a short mention of some performance numbers at the start but then the article focuses on the reduction in outbound traffic (which is probably a good thing) so we've no idea whether Railgun, the other optimisation services that CloudFlare offer of just using a CDN is making these differences.