alphagov/whitehall — pull request #808 by gma (2013-09-02 12:52:29+00:00)
Title: Include rack-mini-profiler in development

I find rack-mini-profiler has a far bigger impact on the performance of what I do than newrelic does. The RailsCast covers its features nicely, though I don't tend to bother with anything beyond inspecting the queries that ActiveRecord has been generating.

http://railscasts.com/episodes/368-miniprofiler?view=asciicast