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jperezdelreal
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swiftui-performance-audit

Diagnose SwiftUI performance issues through code review and profiling guidance.

Updated Apr 6, 2026
Search Tags:#performance#debugging#optimization#profiling#swiftui#instruments#code-review
One-click install
npx skills add https://github.com/jperezdelreal/GymBro --skill swiftui-performance-audit-jperezdelreal
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: swiftui-performance-audit
Source: https://github.com/jperezdelreal/GymBro/tree/main/.squad/skills/ios/swiftui-performance-audit
Command: npx skills add https://github.com/jperezdelreal/GymBro --skill swiftui-performance-audit-jperezdelreal

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

SwiftUI performance issues often hinder user experience, causing jank, slow renders, and unresponsive UI under complex view hierarchies.

Core Features & Use Cases

  • Intake-driven diagnostics: capture symptoms, reproduction steps, and data flow to center the investigation.
  • Code-first review: identify invalidation storms, identity churn, and layout thrash using code smells catalog.
  • Profiling guidance: provide actionable steps to instrument and gather evidence with Instruments or Time Profiler, then map findings to remediation.

Quick Start

Diagnose SwiftUI performance issues from code-first review, and request profiling evidence if code review alone cannot explain the symptoms.

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 rendering and jank in my SwiftUI app?▼

Fix SwiftUI jank by analyzing code for invalidation storms and layout thrash, then applying profiling guidance with Instruments to map evidence to remediation.

What causes high CPU usage in SwiftUI views?▼

High CPU usage in SwiftUI often stems from invalidation storms, identity churn, or layout thrash, which you can identify through a structured code-smell review.

What is the best way to profile excessive layout thrash in SwiftUI?▼

The best way to profile excessive SwiftUI layout thrash is gathering evidence with Instruments or Time Profiler, guided by a prior code review to pinpoint invalidation storms.

Can I diagnose unresponsive UI under complex SwiftUI hierarchies without Instruments?▼

You can diagnose unresponsive UI in complex SwiftUI hierarchies through a code-first review to identify invalidation storms, but profiling with Instruments is required if code review is insufficient.

When should I use Instruments instead of code review for SwiftUI optimization?▼

Use Instruments for SwiftUI optimization when code review alone cannot explain symptoms like slow rendering or high memory usage, requiring profiling evidence to map findings to remediation.

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