参考：http://www.cnblogs.com/xusion/articles/3473119.html
http://www.tuicool.com/articles/aiami2
http://nichol.as/benchmark-of-python-web-servers
基本是 tornado < uwsgi < gevent
常见部署都是 nginx + uwsgi + xxx / nginx + gevent + xxx
原文：http://www.cnblogs.com/johnchow/p/4882473.html