The M5 SSD's performance uplift was fairly substantial, even when compared to the prior generation.

> In the Blackmagic Disk Speed Test, the SSD in the M5 MacBook Pro achieved read speeds of up to 6,323 MB/s, compared to just 2,031 MB/s on the M4 MacBook Pro. It's not like the M4 is "slow" in a vacuum, but the M5 SSD is over three times faster, which is a great generation uplift.

https://www.tomshardware.com/laptops/macbooks/m5-macbook-pro...

My suspicion is that this is simply due to the M5 having more memory, and the OS already having most of the file cached. The M2 has more memory pressure and would cache fewer of the SSD reads

If that's true, inference speed would be even lower if you have only 2GB total, including OS caches

I am relying quite heavily on system caching and pread. And yeah, M5 is a way faster and I can guess Mac can cache something, even if process stays under 2gb.

It was 83ms read per token for M2 and 12ms on M5 pro. Total is 163ms/tok vs 30ms/tok for M5. So yeah, there is a faster read and faster gpu processing

Not only is it older, so Pro:Pro it would have much slower SSD, but doesn't the Air also have slower SSD than the Pro in the same generation? And maybe narrower memory bandwidth?

The M5 MBP has 24GB of RAM, more context in RAM perhaps?