# performance-profiling

> Claude/Codex skill by [@MengTo](https://omgskills.com/library/mengto/index.md) · 3.8k stars · Updated 2026-07-28

Guide performance profiling for Apple platform apps with Instruments, Xcode diagnostics, and MetricKit. Use when investigating app hangs, stutters, high CPU, memory leaks, memory growth, OOM crashes, slow launch, battery drain, thermal issues, App Store performance readiness, or when adding os\_signpost and measurement hooks.

## Install

```sh
git clone https://github.com/MengTo/Skills /tmp/Skills && ln -s /tmp/Skills/agent-skills/codex/performance-profiling ~/.claude/skills/performance-profiling
```

## From README

Performance Profiling Use this skill to diagnose Apple app performance issues systematically, pick the right profiling workflow, apply targeted fixes, and verify the change with real measurements.

## Links

- HTML page: https://omgskills.com/library/mengto/skills/performance-profiling/
- GitHub: https://github.com/MengTo/Skills
- Author: [@MengTo](https://omgskills.com/library/mengto/index.md)

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