Ofcourse you are sacrificing performance when you put slower cores alongside fast cores, instead of using all fast cores only. And for what - ARM cpu cores alre

Ofcourse you are sacrificing performance when you put slower cores alongside fast cores, instead of using all fast cores only. And for what - ARM cpu cores already are very efficient. So saving a few more watts with the slower cores, at the expense of performance (faster cores) isn't a worthwhile tradeoff when you are doing some cpu intensive task on your desktop. Saving a few extra watts matters on phones / tablets / laptops because you can use it longer on battery.