Tornado (web server)

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Original author(s) FriendFeed
Developer(s) Facebook, Bret Taylor
Initial release 2009; 6 years ago (2009)
Stable release 4.1 / February 7, 2015; 3 months ago (2015-02-07)
Development status Active
Written in Python
Operating system Cross-platform
Available in English
Type Web server
License Apache licence 2.0

Tornado is a scalable, non-blocking web server and web application framework written in Python.[1] It was developed for use by FriendFeed; the company was acquired by Facebook in 2009 and Tornado was open-sourced soon after.[2]


Tornado is noted for its high performance. It tries to solve the C10k problem affecting other servers. The following table shows a benchmark test of Tornado against other Python-based servers:

Performance on AMD Opteron, 2.4 GHz, four cores[3]
Server Setup Requests per second
Tornado nginx, four frontends 8213
Tornado One single-threaded frontend 3353
Django Apache/mod_wsgi 2223 Apache/mod_wsgi 2066
CherryPy Standalone 785


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