super-efficient       
adjective (also superefficient) uk/ˌsuː.pər.ɪˈfɪʃ.ənt/ us/ˌsuː.pɚ.ɪˈfɪʃ.ənt/
 效率极高的
working or operating extremely quickly and effectively in a very organized way
  The shop is lit with super-efficient lightbulbs. 这家商店使用超节能的灯泡照明。 
 The washing machines use a superefficient hot-water system. 这些洗衣机使用超高效的热水系统。 
 - More examples
 - Many companies rely on super-efficient manufacturing processes.
 - Many car companies have developed super-efficient engines to reduce fuel consumption.
 - Her super-efficient personal assistant was able to take over the running of the office while she was away.
 - All the staff in the hotel were super-efficient and friendly.
 - This award-winning oven is superefficient.