A couple of years ago there was an article comparing the various wsgi servers. The one that seemed most performant/low memory at the time was gevent, so I chose it for the application I was writing at the time to run on an ec2 micro behind nginx. It was very easy to use too, just wrote a 10 line python script and that was it.
I've never seen any articles about it since, so I wonder if others know something I don't. Can anyone compare gevent's webserver vs. uwsgi, gunicorn, etc behind nginx?