# 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:

````plaintext
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!

---

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