swiftui-performance-audit

Diagnose SwiftUI performance issues through code review and Instruments profiling.

1|1|Updated Jun 2, 2025

Search Tags:#performance #troubleshooting #optimization #profiling #swiftui #instruments #code-review

Ready to run

npx skills add https://github.com/BumpyClock/dotfiles --skill swiftui-performance-audit-bumpyclock

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: swiftui-performance-audit
Source: https://github.com/BumpyClock/dotfiles/tree/main/.ai_agents/skills/swiftui-performance-audit
Command: npx skills add https://github.com/BumpyClock/dotfiles --skill swiftui-performance-audit-bumpyclock

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

SwiftUI applications can suffer from hitches and inefficient rendering, leading to jank, dropped frames, and poor UX; this skill provides a structured, end-to-end approach to identify, triage, and remediate performance issues.

Core Features & Use Cases

Code-First Review: Step-by-step guidance to inspect data flow, state, and view invalidation that cause excessive updates.
Profiling Guidance: Instructions for using Instruments with the SwiftUI template to capture timelines, hangs, and Time Profiler data.
Remediation Patterns: Concrete strategies to cache heavy work, stabilize view identities, and optimize layout and rendering.

Quick Start

Run an end-to-end SwiftUI performance audit by profiling a target app with Instruments and applying the recommended fixes.

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 SwiftUI view updates and animation hitches?▼

Fix slow SwiftUI view updates by diagnosing data flow and view invalidation through a code-first review, then profiling with Instruments to capture hangs and apply concrete remediation patterns. This targets layout thrash and animation glitches with evidence-based root-cause analysis.

What is the best way to profile SwiftUI rendering performance?▼

The best way to profile SwiftUI rendering performance is using the Instruments SwiftUI template to capture timelines and Time Profiler data. This structured approach identifies dropped frames and inefficient rendering, guiding targeted optimization steps.

How do I stop excessive view body re-rendering in SwiftUI?▼

Stop excessive view body re-rendering by inspecting state management and stabilizing view identities. The audit workflow guides you through data flow inspection and provides remediation patterns to cache heavy work and prevent unnecessary view invalidation.

Can I use this audit workflow for SwiftUI layout thrash and dropped frames?▼

Yes, you can use this audit workflow for SwiftUI layout thrash and dropped frames. It provides end-to-end triage by combining code review with trace-based analysis to identify the root cause of jank and verify applied fixes.

What are common causes of SwiftUI jank and poor user experience?▼

Common causes of SwiftUI jank include inefficient rendering, excessive view updates, and unstable view identities. The audit workflow helps identify these performance issues through profiling timelines and data flow inspection, leading to concrete optimization strategies.

How do I verify that SwiftUI performance optimizations actually work?▼

Verify SwiftUI performance optimizations by re-profiling the target app with Instruments after applying fixes. The audit workflow includes verification guidance to ensure the trace-based analysis confirms the resolution of hitches and improved frame rates.