Compute example counter sampling not working on M4

[LouisChouraki]

Hello,

When running the compute example on a M4 Pro, the duration displayed is always 0ns, no matter the input size (I modified the code to print it as nanoseconds instead of microseconds). But the example works fine on M1-M3. I would assume this generalizes to all M4 chips but I couldn't test it.

I wanted to know if someone has an idea of what could explain this (and ideally how to fix this) as I didn't find much about it online.

[cwfitzgerald]

Hmm, nothing comes to mind, but I haven't personally played around with an M4