Last Week on My Mac: Why E cores make Apple silicon fast
Summary
The article explains how Apple's efficiency cores (E-cores) keep background tasks separate from foreground work, enabling the high-performance cores (P-cores) to stay available for active applications. It places this in the context of big.LITTLE architectures and Quality of Service (QoS), detailing how macOS schedules threads to optimize responsiveness and battery life. Practical examples include background activities like Spotlight indexing and Time Machine backups during startup, illustrating how E-cores improve perceived performance.