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the python ws benchmark uses gevent with ws4py, it's also asynchronous - do you expect twisted to outperform gevent? why?

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For trivial cases gevent might be fast, but its design is simply flawed, it doesn't handle all the intricacies of networks.

Regardless, using a single library, and not even the mainstream one, makes for a poor benchmark.

Can you elaborate on what you think is wrong with Gevent? It comes out pretty well in this shootout: http://nichol.as/benchmark-of-python-web-servers

A common case where it goes very wrong is disconnection logic. It's rather complex and gevent has a very naive view of it, which means you can get stuck greenlets.

Micro-benchmarks rarely are complex enough to expose design problems, my point was that one should at least use the de-facto standard, if not several alternatives too.

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