---
name: performance
description: "Performance work: optimization for frontend, backend, and database, and the baseline measurement framework that proves a change helped. Use when the user asks to speed up, profile, or benchmark code; load references/baseline.md before optimizing and references/optimization.md when choosing changes."
---

# Performance

| File | Load when |
|------|-----------|
| `references/baseline.md` | Measuring performance: establish a baseline, pick metrics for the project type, validate a change |
| `references/optimization.md` | Choosing what to change: rendering, assets, network, JavaScript, backend, database |

Measure first with `references/baseline.md`, then change code guided by `references/optimization.md`, then
re-measure against the baseline.