There's also sockjs (http://sockjs.org http://sockjs.org) which has some rather impressive benchmark results when using the python/tornado server with PyPy (htt

There's also sockjs (http://sockjs.org http://sockjs.org) which has some rather impressive benchmark results when using the python/tornado server with PyPy (http://mrjoes.github.io/2011/12/15/sockjs-bench.html http://mrjoes.github.io/2011/12/15/sockjs-bench.html). 155,000-195,000 messages per second on a single core.