I believe the comment is referring to how the newer ARM CPUs in smartphones utilize small battery efficient cores for basic stuff and can ramp up to more power

I believe the comment is referring to how the newer ARM CPUs in smartphones utilize small battery efficient cores for basic stuff and can ramp up to more power hungry cores for the heavy stuff: https://en.wikipedia.org/wiki/ARM_big.LITTLE https://en.wikipedia.org/wiki/ARM_big.LITTLE