swiftui-performance
Profile, diagnose, and remediate SwiftUI runtime performance using code review, Instruments, and repeatable measurements. Use when a SwiftUI screen renders slowly, scrolling or animations hitch, view bodies update excessively, list identity churns, layout work spikes, or broad Observation dependencies raise CPU cost. Covers evidence-based triage, SwiftUI Instruments lanes, lazy-container guardrails, state lifetime, and before/after verification.
Profile →npx skills add dpearson2699/swift-ios-skills --skill swiftui-performance --agent claude-code
Same command for any agent — swap --agent for codex, cursor, copilot.
Weekly change comes from our own snapshots, not the repository page — it measures attention, not adoption.
# SwiftUI Performance Audit SwiftUI view performance from a reproducible symptom to measured remediation. Route animation design to `swiftui-animation`, production telemetry to `metrickit`, ownership/leak analysis to `ios-memgraph-analysis`, navigation behavior to `swiftui-navigation`, state architecture to `swiftui-patterns`, and layout construction to `swiftui-layout-components`. ## Contents - [Workflow Decision Tree](#workflow-decision-tree) - [1. Code-First Review](#1-code-first-review) - [2. Guide the User to Profile](#2-guide-the-user-to-profile) - [3. Analyze and Diagnose](#3-analyze-and-diagnose) - [4. Remediate](#4-remediate) - [Common Code Smells (and Fixes)](#common-code-smells-and-fixes) - [5. Verify](#5-verify) - [Outputs](#outputs) - [Instruments Profiling](#instruments-profiling) - [Identity and Lifetime](#identity-and-lifetime) - [Lazy Loading Patterns](#lazy-loading-patterns) - [State and Observation Optimization](#state-and-observation-optimization) - [Common Mistakes](#common-mistakes) - [Review Checklist](#review-checklist) - [References](#references) ## Workflow Decision Tree - Code supplied: review it first and label findings as hypotheses. - Symptoms only: co
- Contents
- Workflow Decision Tree
- 1. Code-First Review
- 2. Guide the User to Profile
- 3. Analyze and Diagnose
- 4. Remediate
- Common Code Smells (and Fixes)
- 5. Verify
- Outputs
- Instruments Profiling
- Identity and Lifetime
- Lazy Loading Patterns
- State and Observation Optimization
- Common Mistakes
What does the swiftui-performance skill do?
Profile, diagnose, and remediate SwiftUI runtime performance using code review, Instruments, and repeatable measurements. Use when a SwiftUI screen renders slowly, scrolling or animations hitch, view bodies update excessively, list identity churns, layout work spikes, or broad Observation dependencies raise CPU cost. Covers evidence-based triage, SwiftUI Instruments lanes, lazy-container guardrails, state lifetime, and before/after verification.
How do I install it?
Run `npx skills add dpearson2699/swift-ios-skills --skill swiftui-performance --agent claude-code` — it drops the skill into your project so the agent can pick it up. Swap the --agent value for codex, cursor or copilot if you use one of those.
Where does this skill come from?
From dpearson2699/swift-ios-skills, a repository with 963 stars. We read it straight from the repository tree rather than a submitted listing, so what you see here is what is actually published.
Is a popular skill a good skill?
Not necessarily. Stars measure attention, not adoption — a repository can trend for a week and be abandoned. That is why we show the weekly change from our own snapshots next to the total, instead of a single flattering number.