How does this skill detect performance issues?

It performs a targeted review of your SwiftUI views to find common anti-patterns like heavy work in the body property, unstable list IDs, and broad state dependencies that cause excessive re-renders.

Can it help if code review alone isn't enough?

Yes, it provides a structured workflow for using the SwiftUI template in Xcode Instruments, helping you capture, export, and interpret trace data to find root causes.

What specific SwiftUI 'code smells' does it look for?

It identifies expensive formatters allocated in views, inline sorting/filtering in ForEach, unstable identities using 'id: .self', and large image decoding on the main thread.

Does this skill provide actual code fixes?

Yes, it offers specific refactoring suggestions such as moving logic to view models, using granular @Observable properties, and implementing image downsampling.

SwiftUI Performance Audit

Name: SwiftUI Performance Audit
Author: robinsalehjan

byrobinsalehjan

0•

Mobile Development

Identifies and resolves SwiftUI runtime performance bottlenecks through automated code review and guided Instruments profiling.

The SwiftUI Performance Audit skill provides a comprehensive framework for diagnosing and fixing performance issues in iOS and macOS applications. It analyzes your codebase to detect common anti-patterns like view invalidation storms, unstable list identities, and layout thrash, while offering step-by-step guidance for using Apple's Instruments to capture and interpret trace data. Whether you are dealing with janky scrolling, high CPU usage, or excessive memory consumption, this skill helps you implement concrete optimizations—such as narrowing state scope and offloading heavy computations—to ensure your SwiftUI interfaces remain fluid and responsive.

主要功能

01Guided workflows for Xcode Instruments SwiftUI profiling and trace analysis

02Targeted remediation steps for layout thrash and image decoding issues

03Analysis of list identity stability to prevent scrolling stutter

04Detection of view invalidation storms and excessive re-renders

050 GitHub stars

06Identification of expensive computations and formatting within view bodies

使用场景

01Diagnosing 'impossible' layout bugs involving GeometryReader or PreferenceKeys

02Reducing battery drain and CPU spikes caused by inefficient state management

03Eliminating frame drops and jank in complex SwiftUI Lists or ScrollViews

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add robinsalehjan/superlego swiftui-performance-audit

For use in Claude.ai and ChatGPT

Download Skill