Add support for WebSocket Compression Extensions
 http://www.igvita.com/2013/11/27/configuring-and-optimizing-websocket-compression/

> Specifically, it enables the client and server to negotiate a compression algorithm and its parameters, and then selectively apply it to the data payloads of each WebSocket message: the server can compress delivered data to the client, and the client can compress data sent to the server.

Check out the [working draft](http://tools.ietf.org/html/draft-ietf-hybi-permessage-compression-15)
