Was going to mention this as well. socket.io falls back to long polling, so you have to be careful when trying to produce benchmarks based only on websockets.

Was going to mention this as well. socket.io falls back to long polling, so you have to be careful when trying to produce benchmarks based only on websockets. I didn't see this in the server code so I assume the default transports were used. io.configure(ENV, function(){ io.set('transports', ['websocket']); }); more here: https://github.com/LearnBoost/Socket.IO/wiki/Configuring-Socket.IO https://github.com/LearnBoost/Socket.IO/wiki/Configuring-Soc... Also, Firefox version would be nice to know.