reload

# File actionpack/lib/action_controller/routing/route_set.rb, line 243
      def reload
        if @routes_last_modified && configuration_file
          mtime = File.stat(configuration_file).mtime
          # if it hasn't been changed, then just return
          return if mtime == @routes_last_modified
          # if it has changed then record the new time and fall to the load! below
          @routes_last_modified = mtime
        end
        load!
      end