MiniMini Profiler is a fork of Mini Profiler that is aimed a beginning rails programmers.
To install add the following to your gemfile and then run the bundle command:
gem 'mini-mini-profiler', :require => 'rack-mini-profiler'
And add the following to ApplicationController in app/controllers/application_controller.rb
before_filter :setup_profiler
def setup_profiler
Rack::MiniProfiler.authorize_request
end