Learn how SwiftUI measures layouts, renders complex views, and when GPU rendering can significantly improve our app’s performance.
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Introduction
As we all know, SwiftUI makes building beautiful interfaces surprisingly easy, but many of us eventually encounter questions in our mind while developing UI like:
Why is my animation stuttering?
Why doesn’t my gradient mask behave as expected?
Why is my custom drawing consuming CPU?
When should I use GeometryReader?
What’s the difference between compositingGroup() and drawingGroup()?
These APIs are often misunderstood because they work behind the scenes in SwiftUI’s rendering pipeline.
In this article, we’ll build a solid understanding of:
