Test case for LazyVStack scrolling behaviour with a large number of items.

BigLazyVStack.swift

struct ContentView: View {

    let count = 1_000_000

    var body: some View {
        ScrollViewReader { reader in
            VStack {
                Button(action: { reader.scrollTo(100, anchor: .center) }) {
                    Text("Scroll to 100") // Works
                }

                Button(action: { reader.scrollTo(count, anchor: .center) }) {
                    Text("Scroll to \(count)") // Hangs above 10,000 rows
                }

                ScrollView {
                    LazyVStack {
                        ForEach(1...count, id: \.self) {
                            Text("Row \($0)").id($0)
                        }
                    }
                }
            }
        }
    }
}