SwiftUI Academy · Lesson

LazyVStack & LazyHStack

Render large content lazily for performance.

The Eager Problem

A regular VStack builds every child at once. With hundreds of rows, that eager work can stutter and waste memory.

A LazyVStack only creates rows as they scroll into view, keeping huge lists fast and light. ⚡

LazyVStack {
    ForEach(items) { item in
        Row(item)
    }
}