A matrix multiplication test appears to be run on the AMX matrix co-processor, and behaves differently from in-core tests. And what Power modes really do.
performance
Power use in two in-core performance tests, by number of threads run, leading to estimates of total energy used by P and E cores running the same code, at high frequencies. How efficient are the CPU cores in the M4?
In-core performance compared across P and E cores in M1, M3 and M4 chips shows substantial performance improvements, particularly in vector and matrix computation.
Less glamorous than the P cores, E cores are used to run background threads. Details of their architecture, how threads are managed on them and their efficiency.
macOS virtual machines are preferentially run on P cores. Details on their performance, core allocation, frequencies and power use/
Details of their frequency, ISA, power use, and how macOS allocates threads to P cores and relocates them. Supported by data from an M4 Pro.
Set up from unboxing in under 2 hours, its CPU cores perform better than those in the M3, differences that are magnified.
One of the most common reasons for opening Activity Monitor is to check the % CPU of processes that might be running out of control. How accurate are those figures, though, and should you believe them?
Comparing CPU core counts and maximum core frequencies across the four families in the M series, plus expected performance of Thunderbolt 5. Which M4 Mac should you buy?
How much faster should a Thunderbolt 3 SSD be for making Time Machine backups? How can you speed up backups to your NAS? Here are representative speeds from real testing.
The Eclectic Light Company 