# Performance

> Judges whether the change will hold up — N+1, unnecessary work, large payloads, hot paths.

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

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# Performance

- **Query growth.** Does the change add N+1 queries or repeated lookups?
- **Hot paths.** Is there unnecessary work in a path that runs often?
- **Payloads.** Does it over-fetch or return unbounded responses?
- **Caching.** Is there obvious caching being skipped?

Depth varies by codebase — a latency-sensitive API cares more than a batch job.