Doing a quick and dirty analysis of the GPUs, the M3 -> M4 looks to be entirely clock speed with a few subtests being a touch higher, perhaps the result of memory bandwidth increases, perhaps due to improved L1 cache. But predominately it does just seem like a clock speed increase where any changes in cache and bandwidth supported the increase in clocks. If any where bandwidth driven, I would've expected all tests close to 1 save for a test or two close to 1.1. Instead, we see most tests hovering above 1-1.05. Hence why the overall score is 1.13 higher on a 1.097 clock increase. Interestingly the M2->M3 shows greater variation in performance changes (mostly positive, with a possible regression in particle physics) due to the new dynamic cache.
[USER=263]@leman[/USER] is it possible to run your cache microbenchmark on the M4 to see if anything has changed?
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Test details: We know clock speed didn't change any from M2 to M3 and I used 9.7% faster clocks on the M4 GPU but can't find where in the Geekerwan video I saw that (I know he said ~10% later in the video). One thing I should mention is that to avoid any issues of core count difference I used the 15" MB Air for the M2 and M3 versus the iPad 13' for the M4 (GB doesn't report GPU information for some reason). Also, investigating the JSON file it does seem like a few of the first GPUs tests there is a small ramp up on the first run (or two) in each subtest. Overall, results seem more consistent from report to report than the CPU results for all the processors, M2, M3, and M4 but obviously it would be nice to have some error bars. Can't show OpenCL results because you can't run the OpenCL test on iOS, so we’ll have to wait for M4 Macs.
