10 SwiftUI Performance Tips for 2026

SwiftUI is fast by default, but knowing these optimization techniques will keep your apps buttery smooth.

1. Use LazyVStack Instead of VStack

For long lists, lazy loading is essential:

swift
// Bad - loads all items at once
ScrollView {
    VStack {
        ForEach(items) { item in
            ItemRow(item: item)
        }
    }
}

// Good - loads only visible items
ScrollView {
    LazyVStack {
        ForEach(items) { item in
            ItemRow(item: item)
        }
    }
}
```

## 2. Avoid Expensive Operations in body

Move calculations outside the view body:

```swift
struct GoodView: View {
    let processedData: [Item] // Pre-computed

    var body: some View {
        List(processedData) { item in
            Text(item.name)
        }
    }
}
```

## 3. Use @StateObject for View-Owned Objects

```swift
// Correct - object persists across re-renders
@StateObject private var viewModel = ViewModel()

// Wrong - creates new instance on each render
@ObservedObject var viewModel = ViewModel()
```

## 4. Minimize View Hierarchy Depth

Flatten nested views when possible.

## 5. Use EquatableView for Complex Views

```swift
struct HeavyView: View, Equatable {
    let data: ComplexData

    static func == (lhs: Self, rhs: Self) -> Bool {
        lhs.data.id == rhs.data.id
    }

    var body: some View {
        // Complex rendering
    }
}

// Usage
EquatableView(content: HeavyView(data: data))
```

## 6. Use drawingGroup() for Complex Graphics

```swift
ComplexShape()
    .drawingGroup() // Renders to Metal
```

## 7. Profile with Instruments

Always measure before optimizing!

---

**Want pre-optimized components?** Check out my [SwiftUI UI Components Pack](https://boosty.to/swiftuidev) — 38 components built with performance in mind!