Get app profiling straight from the browser. Usage: (1) http://localhost:3000/rubyprof/start (2) Exercise slow requests (3) http://localhost:3000/rubyprof/stop (be patient) to get a report.

Gemfile

gem 'ruby-prof'

routes.rb

  # ------ Debug ------
  
  if Rails.env.development?
    match 'rubyprof/:action', controller: 'ruby_prof'
  end

ruby_prof_controller.rb

class RubyProfController < ApplicationController
  # before_filter :text_response
  # 
  # def text_response
  #   response.content_type = 'text/plain'
  # end
  
  def start
    if RubyProf.running?
      render text: 'RubyProf is already running.'
    else
      RubyProf.start
      render text: 'RubyProf started.'
    end
  end
  
  def stop
    if RubyProf.running?
      prof = RubyProf.stop
      report = StringIO.new
      RubyProf::GraphHtmlPrinter.new(prof).print(report, min_percent: 1)
      report.close
      render text: report.string
    else
      render text: 'Profiler not running.'
    end
  end
end