prelude: |
  C = Struct.new(:x) do
    class_eval <<-END
      def r
        #{'x;'*256}
      end
      def w
        #{'self.x = nil;'*256}
      end
      def rm
        m = method(:x)
        #{'m.call;'*256}
      end
      def wm
        m = method(:x=)
        #{'m.call(nil);'*256}
      end
    END
  end
  obj = C.new(nil)
benchmark:
  member_reader: "obj.r"
  member_writer: "obj.w"
  member_reader_method: "obj.rm"
  member_writer_method: "obj.wm"