Profile rails controller with ruby-prof

prof.rb

# gem "ruby-prof"


  around_filter :profiler

  def profiler(&block)
    data = RubyProf::Profile.profile(&block)
    filepath = Rails.root.join("tmp", "profiler.html")
    File.open(filepath, "w") do |f|
      RubyProf::CallStackPrinter.new(data).print(f)
    end
    Rails.logger.debug "Profiler results saved to #{filepath}"
    system "open #{filepath}"
  end