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performance

Do Thunderbolt hubs impair performance?

Do fast Thunderbolt SSDs slow down when connected via a Thunderbolt hub? How fast are they when reading at the same time? Does connecting a display affect them?

January 26, 2023 Macs, Technology

Last Week on My Mac: The evolution of Apple silicon

The M2 Pro and Max gain an extra two Efficiency cores, compared to their M1 equivalents. What effect will that have on their performance, and what of the M2 Ultra?

January 22, 2023 Macs, Technology

Last Week on My Mac: The mobile virtual Mac

Just 4 cores and 16 GB of memory were used for the virtual machine to run Xcode and build apps successfully, but only for local testing.

December 4, 2022 Macs, Technology

Disk performance of lightweight macOS VMs on Apple silicon

Writing to the Data volume in a VM is dismally slow. Is using shared storage any quicker? What happens when you copy a VM to an external SSD, or to another Mac?

December 1, 2022 Macs, Technology

Can you game core allocation on Apple silicon?

Some threads are set to run in the background, and get allocated to the E cores. Could you run them in a VM, and effectively promote them to run on P cores instead?

November 28, 2022 Macs, Technology

Getting more from Activity Monitor: Memory

All about memory: different types, Unified Memory, Mach zones and the kernel, and how to manage system memory problems.

August 10, 2022 Macs, Technology

Dismal write performance of Disk Images

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.

July 7, 2022 Macs, Technology

Why are Disk Images so slow at 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?

July 5, 2022 Macs, Technology

Virtualisation on Apple silicon Macs: 1 How well does it work?

T T Read More

Lightweight virtualisation has come to Apple silicon Macs. How well does it work, though? Are there any significant limitations?

July 4, 2022 Macs, Technology

Power on Tap: Dynamic control of P cores in M1 chips

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.

May 31, 2022 Macs, Technology

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