Why does RealityKit has such an high dirty memory footprint?

Creating & loading a plain new AR project that contains only an ARView with no entity added results in about 330 MB of dirty memory(was checked using VM Tracker in instruments).

This can be easily observed by adding the following line:
arView.debugOptions = [.showStatistics]
It's really high and I'm wondering if others experienced this as well.
FYI, Unity has initial dirty memory of "only" 150 MB, which is also high.
SceneKit has initial dirty memory of 80 MB.

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me too