# Performance Review > Review code changes for performance anti-patterns — N+1 queries, unbounded results, blocking ops. Use when this capability is needed. - Skill: `tomevault-io/performance-review-3` (Agent Skill, multi-file: 2 files) - Install (CLI): `npx skillmds@latest add tomevault-io/performance-review-3` - Raw SKILL.md: https://api.skillmd.com/api/skills/tomevault-io/performance-review-3/raw - Safety review: pending - Works with: Claude Code, Claude.ai, OpenAI Codex - Category: Coding & Dev Tools - Author: tomevault-io (https://skillmd.com/u/tomevault-io) - Updated: 2026-09-17 - Page: https://skillmd.com/skills/tomevault-io/performance-review-3 --- # /performance-review Spawns the `performance-reviewer` agent to detect performance anti-patterns in your code changes. ## Steps 1. **Gather context** — detect the scope of changes to review: - If arguments are provided (file paths or PR number), use those as scope - Otherwise, use `git diff` to determine what changed - Identify files touching database queries, API endpoints, or data processing 2. **Spawn the agent** — use the Task tool: ``` Task tool with subagent_type="performance-reviewer" ``` Pass in the prompt: - The diff output and list of changed files - The project's database ORM and framework context - Any performance budgets or constraints from project rules 3. **Present findings** — relay the agent's performance report: - Group by severity: CRITICAL > WARNING - Include specific code locations and estimated impact - Show recommended fixes with before/after examples 4. **Offer follow-up actions**: - "Fix critical issues?" — apply recommended performance fixes - "Add benchmarks?" — create performance tests for flagged code paths - "Review again?" — re-run after changes --- > Converted and distributed by [TomeVault](https://tomevault.io/claim/bis-code) — claim your Tome and manage your conversions.