DEV Community

Cover image for Boost Your App’s Performance with Lazy Stacks in SwiftUI
divyesh vekariya
divyesh vekariya

Posted on

1 1

Boost Your App’s Performance with Lazy Stacks in SwiftUI

Did you know that improper use of SwiftUI stacks can lead to performance issues in your app? 🧐

When building scrollable layouts with VStack or HStack, you might notice lag or slow rendering when dealing with large data sets. That’s where Lazy Stacks come in!

Instead of rendering all views at once, LazyVStack and LazyHStack only create the views currently visible on the screen. This drastically improves memory usage and keeps your app smooth.

Here’s an example:

ScrollView {  
    LazyVStack {  
        ForEach(0..<1000) { index in  
            Text("Item \(index)")  
                .padding()  
                .background(Color.gray.opacity(0.2))  
                .cornerRadius(8)  
        }  
    }  
} 
Enter fullscreen mode Exit fullscreen mode

✨ Why use Lazy Stacks?

Efficiency: Only the visible views are loaded into memory.
Scalability: Handle thousands of items seamlessly.
Flexibility: Works perfectly within ScrollView.
❓ How do you decide between using VStack and LazyVStack in your projects?

Let me know in the comments! 👇

Do your career a big favor. Join DEV. (The website you're on right now)

It takes one minute, it's free, and is worth it for your career.

Get started

Community matters

Top comments (0)

👋 Kindness is contagious

Engage with a sea of insights in this enlightening article, highly esteemed within the encouraging DEV Community. Programmers of every skill level are invited to participate and enrich our shared knowledge.

A simple "thank you" can uplift someone's spirits. Express your appreciation in the comments section!

On DEV, sharing knowledge smooths our journey and strengthens our community bonds. Found this useful? A brief thank you to the author can mean a lot.

Okay