perform_action_with_benchmark

# File actionpack/lib/action_controller/benchmarking.rb, line 66
      def perform_action_with_benchmark
        if logger
          ms = [Benchmark.ms { perform_action_without_benchmark }, 0.01].max
          logging_view          = defined?(@view_runtime)
          logging_active_record = Object.const_defined?("ActiveRecord") && ActiveRecord::Base.connected?

          log_message  = 'Completed in %.0fms' % ms

          if logging_view || logging_active_record
            log_message << " ("
            log_message << view_runtime if logging_view

            if logging_active_record
              log_message << ", " if logging_view
              log_message << active_record_runtime + ")"
            else
              ")"
            end
          end

          log_message << " | #{response.status}"
          log_message << " [#{complete_request_uri rescue "unknown"}]"

          logger.info(log_message)
          response.headers["X-Runtime"] = "%.0f" % ms
        else
          perform_action_without_benchmark
        end
      end