See this answer: https://swiftui-lab.com/digital-lounges-2022/#data-15

> Surely on a modern computer you can redraw a couple of text fields at 30fps?

Yeah this is the tricky thing, with how (I'm guessing) the code looks, you would think it's only updating the text fields. But in reality it's probably re-rendering the entire hierarchy using the @EnvironmentObject. So the SceneKit view gets setup and rendered every update of the Slider.

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I have real-time color pickers for changing all windows in my app. Same with font sizes. It's possible to make it work, you just have to modify your design (which is unfortunate).