Ah, I should clarify... if you already have your whole site on a CDN, and that CDN supports HTTP/2, then you are probably best not sending request to lots of ot

Ah, I should clarify... if you already have your whole site on a CDN, and that CDN supports HTTP/2, then you are probably best not sending request to lots of other domains if you are able to serve the request from your own domain. The connection overhead of DNS + connection + TLS is still significant... and HTTP/2 means you'll already have a connection to your server, and the assets could already be being pushed to you, but at the least you'll be able to grab them from the same open connection.