Performance

Performance is a Quality skill for Claude Code, published by rshankras in claude-code-apple-skills.

659 stars60 forkson rshankras/claude-code-apple-skillsAdded 2026/08/24+3% in starsRepository updated 2026/07/24

agent-skillsai-toolsanthropicapp-storeappleasoclaudeclaude-codecode-generationdeveloper-toolsindie-developeriosipadosmacosswiftswiftuivisionoswatchosxcode

Install in seconds

Install Performance

Copy Performance into your Claude Code skills folder. Run the command in your terminal, or review the source on GitHub before installing.

terminal

npx degit https://github.com/rshankras/claude-code-apple-skills/tree/main/skills/performance ~/.claude/skills/performance

Requires Node.js. Downloads this skill only — not the rest of the repository — into your Claude Code skills folder.

Without Node.js

git clone https://github.com/rshankras/claude-code-apple-skills.git

Clones the whole repository, then copy the skill’s own directory into your skills folder yourself.

In this catalog

Source file: skills/performance/SKILL.md in rshankras/claude-code-apple-skills
Installs to: ~/.claude/skills/performance
Collection: One of 25 skills cataloged from this repository
Category: Quality — 1354 skills

What Performance does

Performance helps diagnose slow, janky, or hanging apps with profiling guidance and SwiftUI render debugging. Use it for Instruments, memory issues, slow launches, energy drain, unnecessary re-renders, and view identity problems.

Performance is cataloged under Quality on DirSkills. Performance comes from a repository tagged agent-skills, ai-tools, anthropic, app-store and apple.

Documentation

README

Excerpt

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.

This is the opening of the README. Read the full README on GitHub.

Frequently asked about Performance

What else does rshankras publish alongside Performance?
Performance is one of 25 skills that DirSkills catalogs from rshankras/claude-code-apple-skills, the repository it ships in. Its siblings there include Ad Attribution, App Description Writer and App Store Optimization. Each one is a separate skill with its own page in this directory, installs the same way Performance does, and is maintained by rshankras in that same repository. The rest of the collection is listed on the rshankras/claude-code-apple-skills page.
How does Performance compare to other Quality skills?
Performance ranks #1099 by stars among the 1354 Quality skills in this catalog. The most-starred ones next to it are Benchmark, Benchmark Optimization Loop and API Design Patterns. DirSkills ranks by the star count of the repository each skill ships in, so that order reflects how popular those repositories are rather than any review of Performance against them. Open each page to compare what they document and how they install.