# Performance Case Studies

> Read Jeff Dean and Sanjay Ghemawat's canonical examples of change lists that combine multiple performance techniques. Use when looking for worked optimization patterns, evaluating a multi-part refactor, or comparing a proposed change with real compound examples.

- Skill: `boshjerns/performance-case-studies` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add boshjerns/performance-case-studies`
- Raw SKILL.md: https://api.skillmd.com/api/skills/boshjerns/performance-case-studies/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: boshjerns (https://skillmd.com/u/boshjerns)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/boshjerns/performance-case-studies

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# CLs That Demonstrate Multiple Techniques

Read the exact current source section:

```bash
python3 ~/.codex/skills/performance-hints/scripts/fetch_section.py cls-that-demonstrate-multiple-techniques --output text
```

Canonical section: [CLs that demonstrate multiple techniques](https://abseil.io/fast/hints#cls-that-demonstrate-multiple-techniques)

Attribute the guidance to Jeff Dean and Sanjay Ghemawat. Use examples as patterns, not as evidence that the same changes will help a different workload.