Thanks for confirming it! I filed a radar: FB7519739
Fritzt
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Did you ever find out about the cause? I'm experiencing the same with A12 devices (iPhone Xs 256GB + iPad Pro 11"). Access to large 3D textures used to be much faster on older devices, so it seems. I wonder if this is related to the new TBDR-architecture of the A11. Altrough I remember it being faster on the iPhone X...