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Diagnose slow Apple app performance v1.0.0

Use this resource to find and fix slowness, hangs and excessive re-renders in an Apple app

New

  • 466 downloads
  • 186 likes
  • 116 saves

Free

Install with the CLI

In a terminal, from the folder you want:

npx --yes palatekit@latest install apple-app-performance-profiling-2

With no option, the skill goes to ~/.agents/skills/; add --agent claude-code (or codex, cursor…) to target an agent.

First time: connect the CLI with

npx --yes palatekit@latest login

The agent follows a profiling approach with Instruments for hangs, memory, slow launches and energy drain. It also examines SwiftUI re-renders, view identity and lazy loading.

Mostly picked by

Updated November 2, 2026

Card for the “Diagnose slow Apple app performance” skill

Details

Works in
Install guides
Generates with
Your agent's model
Licence
MIT

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What you get

  • profiling/: Instruments for CPU, memory, launch, energy and hangs
  • swiftui-debugging/: body re-evaluation, view identity and lazy loading

Good fit for

  • Your app hangs or stutters during an animation
  • A SwiftUI view re-renders too often

Not for

    Tags

    • performance
    • instruments
    • swiftui
    • memory
    • stutter

    About

    You say

    “My list screen slows down when scrolling: find the causes of the re-renders and suggest fixes.”

    Card for the “Diagnose slow Apple app performance” skill

    Skill published by rshankras under the MIT license, delivered in its original version.

    Show more

    How to use it

    1. Install the skill in your agent's skills folder
    2. Ask your agent to find and fix slowness, hangs and excessive re-renders in an Apple app
    3. Review and adjust the result

    Content preview

    Files

    • LICENSE1.1 KB
    • NOTICE-PALATEKIT.md0.5 KB
    • profiling/energy-diagnostics.md14.2 KB
    • profiling/hitches.md7.3 KB
    • profiling/launch-optimization.md19.5 KB
    • profiling/memory-profiling.md23.6 KB
    • profiling/SKILL.md12.1 KB
    • profiling/time-profiler.md22.9 KB
    • SKILL.md1.6 KB
    • swiftui-debugging/body-reevaluation.md11.7 KB
    • swiftui-debugging/common-pitfalls.md13.5 KB
    • swiftui-debugging/lazy-loading.md9.7 KB
    • swiftui-debugging/SKILL.md14.6 KB
    • swiftui-debugging/view-identity.md8 KB

    Origin and licence

    Listed unmodified

    Author
    rshankras
    Source
    github.com/rshankras/claude-code-apple-skills/tree/9ffb83138209057875698dd11c1720c657c47a92/skills/performance
    Licence
    MIT

    Notice

    « performance » (rshankras, MIT) livré dans sa version d'origine : fiche en français et en anglais par PalateKit.

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