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.