After some recent optimizations, the Dojo Cometd implementation of the Bayeux protocol running on the Jetty web server can now handle up to 20,000 simultaneous users per server while maintaining sub-second latency.
impressive numbers. Does the Twisted one can beat that?
A sub-project of OpenDS, the Atom server is an open source community project building an Atom/APP compliant server built atop OpenDS and Java. It is designed to specifically address the gaps in security and search in the Atom and APP specifications as well as provide a high-performance, scalable and robust platform for Atom consuming applications.