run (ActiveSupport::Testing::Profiler)

    # File lib/active_support/testing/performance.rb, line 172
            def run
              return unless @supported

              RubyProf.measure_mode = @metric.measure_mode
              RubyProf.start
              RubyProf.pause
              profile_options[:runs].to_i.times { run_test(@metric, :profile) }
              @data = RubyProf.stop
              @total = @data.threads.values.sum(0) { |method_infos| method_infos.sort.last.total_time }
            end