thoughtbot/suspenders — pull request #144 by croaky (2013-01-24 06:23:57+00:00)
Title: Wrap all HTTP requests in a 5 second timeout

* Web requests should be typically processed in no more than 500ms, and
ideally under 200ms.
* Even though an error page will be issued to the client, and the
connection terminated, when a timeout occurs the web process is still
left to process the request. Subsequent requests may then be routed to
the same process which will be unable to respond, causing further
degradation.
* rack-timeout ensures processes don’t remain tied up after 5 seconds of
inactivity.

https://devcenter.heroku.com/articles/request-timeout