<snark>I was just asking myself: "Hmm, do I want an environment for writing network programs, an asynchronous web server, or a web application framework?" But n

<snark>I was just asking myself: "Hmm, do I want an environment for writing network programs, an asynchronous web server, or a web application framework?" But now I can decide based on a statistically-naive comparison of their concurrency performance!</snark> Seriously, though, solve your problems by seriously looking at what the available tools provide, rather than benchmark numbers or "new hotness" stuff you see on HN. Each of these is a fantastic tool for an appropriate problem, but I don't think there is any problem where any two of these would be in competition.