When it comes to the production environment it is a real test for the application as the users start using the application. It is very important that the performance of the application is something that has to be proactively measured and is a continuous constant effort to get the production environment fine tuned to the need. As far as Rails is concerned there are few insights here and there on the scalability and performance of the application. Stefan Kaes has written a package called Railsbench consisting of some Ruby and shell script code that can do some performance measurement of Rails application. Complementing the plugin is this article by Stefan on “A Look at Common Performance Problems in Rails” that talks about some common performance problems. But as mentioned by Stefan in the article some analysis of the performance of the application is necessary to apply the relevant changes to the application.