Reducing the RAM requirement to 8GB to fit this on my Macbook Air M2 (with room left for other running apps), I get the same figure (66 GB/s) regardless of the number of threads.
If I actually set it to the size of physical memory performance is _much_ lower, as OSX tries to compress the RAM it is using.
If I actually set it to the size of physical memory performance is _much_ lower, as OSX tries to compress the RAM it is using.