In his announcement of the MVC Mini Profiler that this is based on, Sam Saffron writes unencouragingly:

> Our open-source profiler is perhaps the best and most comprehensive production web page profiler out there for any web platform. (http://samsaffron.com/archive/2011/06/09/+Profiling+your+web...)

New Relic (http://newrelic.com/) provides somewhat-similar tracking for Rails as a paid service.