iPhone 18 pro takes very long time to load models

I think this could be relate to previous post here https://developer.apple.com/forums/thread/848590

But in my testing it seems like most of the time spent was in loading but not compilation. Our app has multiple models but so far it seems like one of them has this issue.

The model itself was only 2.2MB, but somehow loading took 50s after compilation? And on 17e it only took 2s to load.

But I cannot attach the model here so please advice.

Thanks for reporting the issue. Would you mind to file a feedback report with your minimal sample and detailed device and system configurations for us to reproduce the issue, and then share your report ID here? We will take a look from there. Thanks!

Best,
——
Ziqiao Chen
 Worldwide Developer Relations.

Thanks for filing the feedback report (FB25092470).

Now that iOS 27.2 Beta 4 is out, we expect that the model loading performance is improved, though it is still not at parity with the old devices. You might give it a try.

Best,
——
Ziqiao Chen
 Worldwide Developer Relations.