BobTheDog wrote:Build speed in XCode seems much slower on the M1, maybe 1/2 or a 1/3 of the speed. This is fully CPU bound and the MacPro has very good hyper threading so pretty good 24 “core” performance, the M1 to me seems to have 4 very fast cores and 4 pretty useless cores but even so has pretty good performance.
If you have 24 cores running parallel process, then yes you have more raw grunt than the M1, even if single core performance is potentially lower (check your Geekbench scores for that).
Having said that, I've seen various independent compile tests from different people who are saying that their Xcode builds are faster than their iMac Pros - a £6-7K machine.
Yes, the low performance cores are less performant by design than the high performance cores. That's in the name of power efficiency and battery life, so the heavier cores don't need to be activated for small workloads.
The bottom line is, this is an entry level machine with pretty stunning performance. I'm interested to see how the M1+ scales up for the larger machines, as obviously, they're not going to be putting 1.5TB of RAM the Mac Pros can support in the processor package...
BobTheDog wrote:p.s. I have not heard the fan come on yet!
How's the temperature?