All about memory: different types, Unified Memory, Mach zones and the kernel, and how to manage system memory problems.
performance
Three types of Disk Image, encrypted or not, tested when freshly made or used and remounted. So many variations, but only one type of Disk Image can be trusted for writing.
A Mac Studio Max has an SSD delivering up to 7.4 GB/s, and a CPU up to 50% faster than a 16-core Xeon. Why does it write an encrypted disk image at the speed of a slow hard disk?
Lightweight virtualisation has come to Apple silicon Macs. How well does it work, though? Are there any significant limitations?
Both P and E cores are run at different frequencies according to the load on M1 chips. This explores how macOS manages their frequencies and why.
How the E and P cores in an M1 Max chip cope with the heavy system workload after login, but still give the user the scope to run apps immediately.
File data stored towards the periphery of the disk is read and written nearly twice as fast as that near the centre. How to take advantage of this.
How to work out how many threads and which cores are needed to achieve a compression rate up to 1.7 GB/s, and how to estimate power and energy.
What’s our purpose? What factors confound the results of tests, and how to eliminate them? Which tests? What should we believe, and where do we go from here?
There’s evidence to suggest that original M1 Macs write more slowly to external SSDs in some configurations. Does this extend to later models with M1 Pro or Max chips?
The Eclectic Light Company 