> Turboboost lets a single thread go to higher frequencies than a fully loaded CPU. So you would expect "sum of user times" to increase even if "sum of user clo

> Turboboost lets a single thread go to higher frequencies than a fully loaded CPU. So you would expect "sum of user times" to increase even if "sum of user clock cycles" is scaling perfectly. Ah yes, this is a good one! I did not account for this. Mental model updated. Your other points are good too. I considered some of them as well, but maybe not enough in the context of competition making many things just a bit slower. Makes sense.