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OT: Comparison of IPad Pro 2018 with 2021
Didn’t manage to resist so ordered a 12.9” 1TB on Friday and it arrived this evening…
Just ran a benchmark using multiples of a 3 channel setup in AUM, 1st has Atom 2, 2nd has Roli Noise and 3rd has GeoShred.
Two columns for each model in the spreadsheet below, first is with apps loaded but not running and second is with Atom 2 looping and playing the other two apps.
Just kept loading multiples of the three channels till >100% processing was showing, and in the case of the channels running they started producing clicking / became unresponsive.
This is on IPadOS 14.6 and good news is that all apps in test worked fine.
Spreadsheet below…
Comments
Can you explain the conclusions drawn from the chart, please.
Thanks for posting your results.
M1 appears to be ~50% faster than A12X when under heavy load in AUM?
18 vs 27 / 24 vs 36 channels @ >100% CPU utilization.
Sorry, I don’t think I explained the results very well… the figures are representing loading and not speed…
If you take the row for 18 channels as an example, the 2018 IPad with 18 AUM channels loaded and not running used 73% AUM DSP and over 100% (unusable because of crackling) when running.
Compare this with 50% loaded and not running on the 2021 IPad I.e. 23% less than the 2018 model and 64% when running I.e. 36% less than the 2021.
So because of the lower DSP usage on the 2021 model I was able to load 12 more channels but only run 9 more channels with the newer model before cracking took over.
Thanks @GeoTony, you think this will improve if Apple lifts the 5 gb RAM ceiling?
Not a clue...
Thanks for the comparison. What was your latency/ buffer setting?
I never mess with anything like that as I don’t understand it so I assume the defaults as below…
Für 256 this is really impressive. I have to test how many tracks there are possible at maximum with 1024 setting. It should be a lot more.
OK, just tried at 1024. Interestingly the 2018 model handled a further 3 channels ok I.e. was crackle free with 18 channels but the 2021 didn’t quite handle an additional 3 I.e. slight crackling at 27 channels. At 2048 27 channels was fine. Happy to test anything else if I can…
How about a comparison at 64?
Maximum channels without crackling at buffer size 64 is 11 on 2018 model and 20 on 2021 using Atom 2, Roli Noise and GeoShred
Great info thanks 🙏
Great thanks.
Maybe it’s through internal limits that can get liftet through software
Biggest difference for me between the two is the weight and the thickness increase of the 2021 Pro. It looks tiny on paper, but with a device you’re used to holding a lot it’s definitely noticeable more than I was expecting. Not an issue at all, I just didn’t think it would be so noticeable compared to my 2018 11” Pro.
I always thought it would make sense to go a bit bulkier if it meant better performance / less crazy throttling… uhh, hopefully it does heh.
I checked and 11" 2021 model is 466 g while 11" 2018 model is 468 g with same 5.9 mm thickness for both. 12.9" 2021 model is 682 g with 6.4 mm thickness while 12.9" is 631 g with 5.9 mm thickness. Must be XDR screen on the 12.9".
This iteration seems to have good thermal management with minimal throttling.