swiftui-performance-audit

Audit SwiftUI view trees to identify rendering and layout bottlenecks.

Updated Jun 5, 2026

Search Tags:#performance #audit #profiling #swiftui #instruments #timelines

Ready to run

npx skills add https://github.com/harshav167/build-ios-apps --skill swiftui-performance-audit-harshav167

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: swiftui-performance-audit
Source: https://github.com/harshav167/build-ios-apps/tree/main/skills/swiftui-performance-audit
Command: npx skills add https://github.com/harshav167/build-ios-apps --skill swiftui-performance-audit-harshav167

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

SwiftUI apps often suffer from slow renders, jank, and excessive view updates. This skill provides a code-first audit approach to identify root causes and guide profiling efforts to restore smooth, responsive UI.

Core Features & Use Cases

Code-first review of SwiftUI view trees to uncover invalidation and identity churn
Profiling guidance using Instruments to capture SwiftUI timelines and Time Profiler traces
Remediation patterns for moving work out of body, caching derived state, and reducing layout churn
Use Case: a developer troubleshooting a laggy List or a rapidly updating detail view can follow this skill to pinpoint bottlenecks and verify improvements

Quick Start

Proactively run a code-first SwiftUI performance audit on the target view to identify the top contributors to UI hitches.

Frequently Asked Questions about swiftui-performance-audit

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

FAQPage Schema

How do I fix slow renders and jank in SwiftUI views?▼

Fix slow SwiftUI renders by running a code-first audit to identify view invalidation and identity churn, then use Instruments to capture SwiftUI timelines and apply targeted remediation patterns like caching derived state.

What is the best way to profile excessive view updates in SwiftUI?▼

Profile excessive SwiftUI view updates using Instruments to capture Time Profiler traces and SwiftUI timelines, which reveal layout costs and frame drops to pinpoint the exact bottlenecks causing high CPU usage.

How do I audit a laggy SwiftUI List for performance bottlenecks?▼

Audit a laggy SwiftUI List by reviewing the view tree for code smells causing layout churn, profiling with Instruments to measure render updates, and moving heavy computations out of the view body.

Can I use this audit approach for project-wide SwiftUI performance assessments?▼

Yes, this audit approach supports both project-wide and component-level SwiftUI assessments, diagnosing hangs, memory growth, and rapid view updates by structuring intake and profiling efforts across the entire application.

Why does my SwiftUI detail view cause high CPU and memory growth?▼

High CPU and memory growth in a SwiftUI detail view often stems from identity churn and expensive work executed inside the body, which you can diagnose by capturing Instruments traces and reviewing layout costs.

When should I not use a code-first approach to optimize SwiftUI performance?▼

Avoid a code-first approach when you lack structured intake data or cannot profile with Instruments, as remediation requires verifying targeted optimizations against actual SwiftUI timeline captures to reduce UI hitches.