swiftui-performance-audit

Analyze SwiftUI view performance and generate a structured remediation plan.

3|2|Updated Jan 18, 2026
One-click install
npx skills add https://github.com/dagba/ios-mcp --skill swiftui-performance-audit-dagba
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: swiftui-performance-audit
Source: https://github.com/dagba/ios-mcp/tree/main/skills/swiftui-performance-audit
Command: npx skills add https://github.com/dagba/ios-mcp --skill swiftui-performance-audit-dagba

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

SwiftUI apps can suffer from slow renders, janky scrolling, and excessive view updates due to complex view trees, layout churn, and frequent state changes. This skill assists auditors and engineers by guiding code review and targeted instrumentation to identify root causes and provide actionable remediation.

Core Features & Use Cases

  • Code-first review to locate unhealthy update patterns such as invalidation storms, unstable identities in lists, or heavy work in view bodies.
  • Instrumentation-guided profiling with Instruments to measure frame times, CPU/memory usage, and update counts.
  • Guided remediation with concrete steps, examples, and best practices to reduce update fan-out and improve rendering performance.

Quick Start

Provide a succinct request to analyze a SwiftUI view and generate a remediation plan, plus references to recommended instrumentation steps.

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 reduce view update fan-out?

To fix slow SwiftUI view updates, you analyze source code to locate unhealthy update patterns like invalidation storms and heavy work in view bodies. Applying targeted optimizations and update caching reduces excessive view update fan-out.

How do I profile SwiftUI rendering performance and high frame times with Instruments?

To profile SwiftUI rendering performance, you use Instruments to measure frame times, CPU usage, and update counts. This instrumentation-guided profiling isolates layout thrash and slow renders to produce targeted remediation guidance.

What causes janky scrolling and layout thrash in SwiftUI applications?

Janky scrolling and layout thrash in SwiftUI are caused by complex view trees, unstable identities in lists, and layout churn. A code-first review identifies these root causes by evaluating view bodies for heavy work and invalidation storms.

Do I need to provide source code and performance metrics for a SwiftUI performance audit?

Yes, a SwiftUI performance audit requires access to source code and performance metrics. Providing both enables the analysis to locate unhealthy update patterns and output a structured remediation plan with concrete optimization steps.

What is the best way to review SwiftUI code for heavy work in view bodies?

The best way to review SwiftUI code for heavy work in view bodies is a code-first analysis targeting unhealthy update patterns. This approach identifies unstable list identities and layout churn to output concrete remediation guidance and best practice examples.