One of the ways both macOS and iOS get good battery life is burst-y CPU loads to return the CPU to idle as quickly as possible. They also both run background ta

One of the ways both macOS and iOS get good battery life is burst-y CPU loads to return the CPU to idle as quickly as possible. They also both run background tasks like Spotlight on the e-cores whenever possible. So some process maxing out an e-core is using a lot less power than one maxing out a p-core. Background processes maxing out a core occasionally is not as much of a problem as a lot of people seem to assume.