How could you study how Apple silicon CPU cores are used to run code? Comparisons between Activity Monitor, Xcode Instruments, and powermetrics.
Instruments
A detailed exploration of how to use Signposts to investigate performance of your code, and the limitations of Apple’s tools.
After 2 years, developers should be able to use the unified log for performance analysis, thanks to extensions and Xcode’s Instruments. Sysadmins and users remain neglected, though.
The Eclectic Light Company 