>oh XMPP, you mean the protocol that required a TCP connection, and thus battery-draining maintaining a persistent connection ? Um, TCP connections are totally

>oh XMPP, you mean the protocol that required a TCP connection, and thus battery-draining maintaining a persistent connection ? Um, TCP connections are totally silent when idle, save for application level heartbeats. And how would you implement a protocol with push notifications without TCP? It's true that mobile push services exist to save power - they do this by maintaining only one heartbeat, for the most part. But it's not a huge win, and it could be added to XMPP. I don't see how protobufs help this situation at all.