Agent-Skills.md

Agent Skills: Performance Skills

Performance profiling and SwiftUI debugging skills — Instruments guidance, hangs, memory issues, slow launches, energy drain, unnecessary re-renders, and view identity problems. Use when an app is slow, janky, or resource-hungry.

UncategorizedID: rshankras/claude-code-ios-skills/performance

Repository

rshankras/claude-code-ios-skills
rshankrasLicense: MIT
55146

Install this agent skill to your local

pnpm dlx add-skill https://github.com/rshankras/claude-code-apple-skills/tree/HEAD/skills/performance

Skill Files

Browse the full folder contents for performance.

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skills/performance/SKILL.md

Skill Metadata

Name
performance
Description
Performance profiling and SwiftUI debugging skills — Instruments guidance, hangs, memory issues, slow launches, energy drain, unnecessary re-renders, and view identity problems. Use when an app is slow, janky, or resource-hungry.

Performance Skills

Diagnose and fix performance problems, from system-level profiling to SwiftUI render behavior.

When This Skill Activates

Use this skill when the user:

  • Reports the app is slow, janky, or hanging
  • Wants to profile with Instruments (Time Profiler, Allocations, Hangs)
  • Is investigating memory issues, slow launches, or energy drain
  • Sees SwiftUI views re-rendering too often or slow body evaluations
  • Asks about view identity problems or _printChanges()

Available Skills

Paths are relative to THIS file's directory — skills run with cwd set to the user's project, so resolve each path from this SKILL.md's own location.

| Skill | Read | Covers | |-------|------|--------| | profiling | profiling/SKILL.md | Instruments workflows; hangs, memory, slow launch, energy diagnosis | | swiftui-debugging | swiftui-debugging/SKILL.md | Unnecessary re-renders, view identity, slow body evaluations |

How to Route

  1. Match the request to a row above — system-level symptoms → profiling; SwiftUI render symptoms → swiftui-debugging.
  2. Read that SKILL.md (relative to this file) plus any reference files it lists.
  3. Apply the guidance to the user's code.