[rjeli]

Does anyone have recs for doing really low level performance tuning on Apple Silicon? Xcode Instruments isn’t very easy to use or interpret. Things like what % of time is spent on memory stalls, simd units, etc

[watersb]

I believe that macOS still ships with DTrace; Xcode Instruments was originally built on top of it.

https://dtrace.org

(Some people find it easier to write a one-line script that reports the timings that they need; I don't know if it helps you.)