What’s the best way to present a dynamic list of variable height cells using SwiftUI in a low performance device?

To present a dynamic list of variable height cells using SwiftUI on a low-performance device, you can leverage several techniques discussed in the WWDC sessions:

1. Dynamic Layouts: Use the dynamic type size environment keypath to adjust the layout based on the text size. For example, you can switch between HStack and VStack layouts depending on the accessibility size. This approach ensures that the layout adapts dynamically to provide more width to the text, making it easier to read while avoiding truncations. This technique is discussed in the session Get started with Dynamic Type.

2. Composition and Containers: Utilize SwiftUI's built-in containers like List and Section to organize your content efficiently. SwiftUI's List can be initialized with a collection of data or manually written views, and it supports sections for better organization. This is covered in the session Demystify SwiftUI containers.

3. Lazy Grids: For more complex layouts, consider using LazyVGrid or LazyHGrid to create grids that load content lazily, which can help with performance on low-end devices. This is particularly useful when dealing with a large number of items. This approach is demonstrated in the session Migrate your TVML app to SwiftUI.

4. Optimizing Images and Icons: When working with images and icons, ensure they do not scale unnecessarily with text size to save space and improve performance. Prioritize scaling essential content over decorative views. This is discussed in the session Get started with Dynamic Type.

By combining these techniques, you can create a dynamic and responsive list that performs well even on low-performance devices. Here are the relevant sessions for further exploration:

1. Get started with Dynamic Type
2. Demystify SwiftUI containers
3. Migrate your TVML app to SwiftUI