console.rb

    class ::Object
      def hide_inspect_for_one_shot(replacement = "#<#{self.class}:0x#{object_id.to_s(16)}>")
        return unless self
        mc = class <<self; self; end
        mc.send(:alias_method, :inspect_457290, :inspect) 
        mc.send(:define_method, :inspect) do
          mc.send(:alias_method, :inspect, :inspect_457290)
          replacement
        end
      end
    end

#
# Example (console.rb):
#
    def mql(json)
      r = client.mqlread(json)
      pp r
      r.hide_inspect_for_one_shot("≈#{r.to_s.size} bytes")
      r # this will show "≈123 bytes" instead of a verbose data dump.
    end

__END__

>> mql(:id => "/en/lasagna", :type => [])
{"type"=>
  ["/common/topic",
   "/user/skud/food/noodle",
   "/food/ingredient",
   "/user/skud/food/topic",
   "/food/dish"],
 "id"=>"/en/lasagna"}
=> ≈99 bytes

>> _
=> {"type"=>["/common/topic", "/user/skud/food/noodle", "/food/ingredient", "/user/skud/food/topic", "/food/dish"], "id"=>"/en/lasagna"}