Why E cores make Apple silicon fast
The secret to your Mac's speed isn't the powerful cores you think.
Deep Dive
Apple Silicon Macs feel fast because their Efficiency cores handle all background tasks like indexing and backups. This leaves the powerful Performance cores free for your main apps, preventing slowdowns. The system uses a Quality of Service metric to strictly assign background work to E cores, even if it causes delays, ensuring user tasks get priority on the faster P cores. This design prevents the performance struggles common on older Intel Macs.
Why It Matters
This efficient core design is key to the smooth, responsive experience that defines modern Apple computers.