Codeigniter and Real Time Applications

[eluser]Unknown[/eluser]
I made a search about codeigniter and websockets but couldn't find any proper websocket library for it. (Just some outdated edits). Also there are some techniques like polling, long polling for real time web applications, however, due to some physical limitations (bandwidth, memory consumption etc.), they are not good options. Also they have some latency. And i want to know is there any efficient way to build realtime web applications like notification system with CI? (I.e. with websockets?)