swiftui-performance

Audit SwiftUI runtime performance and provide code-first remediation steps.

981|50|Updated Mar 3, 2026
One-click install
npx skills add https://github.com/dpearson2699/swift-ios-skills --skill swiftui-performance-dpearson2699
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: swiftui-performance
Source: https://github.com/dpearson2699/swift-ios-skills/tree/main/skills/swiftui-performance
Command: npx skills add https://github.com/dpearson2699/swift-ios-skills --skill swiftui-performance-dpearson2699

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill addresses slow rendering, janky scrolling, high CPU/memory usage, and other performance issues in SwiftUI applications.

Core Features & Use Cases

  • Performance Auditing: Identifies bottlenecks in SwiftUI view updates, layout, and state management.
  • Diagnostic Guidance: Provides step-by-step instructions for using Instruments to profile SwiftUI apps.
  • Remediation Strategies: Offers concrete code fixes for common performance smells like expensive body computations, unstable identity, and layout thrash.
  • Use Case: Your SwiftUI app's list is scrolling poorly. Use this Skill to analyze the performance, identify the problematic views, and get specific recommendations to fix the jank.

Quick Start

Analyze the performance of the MyComplexListView in the provided code snippet.

Frequently Asked Questions about swiftui-performance

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I fix janky scrolling in a SwiftUI list?

Fix janky scrolling in SwiftUI by auditing view identity, reducing body evaluation cost, and resolving layout thrash. This Skill provides code-first analysis and concrete remediation steps to identify problematic views causing the jank.

What causes excessive view updates and high CPU usage in SwiftUI?

Excessive view updates and high CPU usage in SwiftUI are caused by expensive body computations, unstable identity, and state management bottlenecks. Profiling these issues with Instruments helps pinpoint the exact views triggering the churn.

How do I profile SwiftUI rendering performance using Instruments?

Profile SwiftUI rendering performance using Instruments by following the step-by-step diagnostic guidance this Skill provides. It helps capture runtime data to diagnose slow rendering, memory usage, and view lifetime issues accurately.

Can this Skill help optimize lazy loading and view lifetime in SwiftUI?

Yes, this Skill optimizes lazy loading and view lifetime in SwiftUI by auditing memory usage and identifying identity churn. It delivers concrete code fixes to ensure views load efficiently and maintain proper lifetimes.

What is the best way to audit a complex SwiftUI view for layout thrash?

The best way to audit a SwiftUI view for layout thrash is a code-first review targeting excessive view updates and body evaluation cost. This Skill analyzes your snippets to identify layout thrash and offer specific remediation strategies.