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Re:A Node.js speed dilemma: AJAX or Socket.IO? by johnx123-up on Friday October 26, 2012 @05:31AM (#4701501)
"transport" of Socket.IO plays major role (but, it's not smooth/plug 'n play). Benchmark missing note about chosen transport.
Re:A Node.js speed dilemma: AJAX or Socket.IO? by biscarch on Friday October 26, 2012 @07:18AM (#4701706)
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-Soc...

Also, Firefox version would be nice to know.