Anyone who uses CloudFlare for their web site can experiment with HTTP/2 Server Push. https://blog.cloudflare.com/announcing-support-for-http-2-se...

It's simply a matter of adding appropriate Link headers to responses and we can push stuff to clients. This makes it easy to run experiments without having to have a server that already supports push.

https://blog.cloudflare.com/http-2-server-push-with-multiple...

We rolled this out precisely so people can experiment and we are very interested to understand how people are using it and what performance improvements and problems they run into.