Why is my SwiftUI view re-rendering too often?

This skill helps identify 'invalidation storms' caused by broad state dependencies or unstable view identities that force SwiftUI to recreate entire hierarchies unnecessarily.

Can it help with high memory usage in SwiftUI?

Yes, it analyzes view lifetime, identity stability, and lazy loading patterns to reduce unnecessary memory overhead and state leaks.

Does it provide guidance on using Xcode Instruments?

Yes, it includes specific workflows for the SwiftUI Instrument template, Time Profiler, and identifying main-thread hangs greater than 250ms.

How does this skill identify SwiftUI performance issues?

It performs a code-first review for common smells like heavy work in view bodies and uses Xcode Instruments data to pinpoint specific re-render triggers.

Does it support the latest Swift 6 features?

Absolutely, it is specifically designed for Swift 6.3 and modern Apple frameworks, including the @Observable macro and latest concurrency patterns.

SwiftUI Performance Optimizer

Name: SwiftUI Performance Optimizer
Author: dpearson2699

bydpearson2699

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409

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Mobile Development

Audits and optimizes SwiftUI runtime performance to eliminate frame drops, memory leaks, and excessive view updates.

This skill provides a comprehensive toolkit for diagnosing and remediating performance bottlenecks in modern SwiftUI applications built with Swift 6.3 and iOS 26+. It guides developers through code-first reviews to identify common smells—such as heavy computations in view bodies or unstable identities—and offers step-by-step instructions for using Xcode Instruments to profile production builds. By automating the detection of view invalidation storms and layout thrash, it helps maintain smooth 60/120 FPS interfaces while optimizing memory usage and state observation patterns.

Key Features

01409 GitHub stars

02Optimization patterns for lazy loading and state observation

03Detection of view identity churn and invalidation storms

04Comprehensive code-first performance auditing for SwiftUI views

05Identification of main-thread hotspots and layout thrash

06Step-by-step Xcode Instruments profiling and trace analysis guidance

Use Cases

01Reducing high CPU usage and battery drain caused by excessive re-renders

02Resolving memory growth issues related to view lifetime and state management

03Debugging janky scrolling and frame drops in complex lists or grids

Key Features

01409 GitHub stars

02Optimization patterns for lazy loading and state observation

03Detection of view identity churn and invalidation storms

04Comprehensive code-first performance auditing for SwiftUI views

05Identification of main-thread hotspots and layout thrash

06Step-by-step Xcode Instruments profiling and trace analysis guidance

Use Cases

01Reducing high CPU usage and battery drain caused by excessive re-renders

02Resolving memory growth issues related to view lifetime and state management

03Debugging janky scrolling and frame drops in complex lists or grids