# Performance Review

> Provides performance optimization guidelines for profiling, caching, memory management, and concurrency. Use when optimizing slow code, fixing memory leaks, improving throughput, or conducting performance reviews.

- Skill: `majiayu000/performance-review-4` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add majiayu000/performance-review-4`
- Raw SKILL.md: https://api.skillmd.com/api/skills/majiayu000/performance-review-4/raw
- Safety review: pending (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: majiayu000 (https://skillmd.com/u/majiayu000)
- Updated: 2026-09-22
- Page: https://skillmd.com/skills/majiayu000/performance-review-4

---


# Performance Review Skill

## When to Use

- Code performance optimization
- Memory leak fixes
- Throughput improvements
- Performance review requests
- Bottleneck analysis

## Performance Analysis Workflow

```
Profiling → Identify bottlenecks → Optimize → Verify
```

## Checklist

### Algorithm & Data Structures

- [ ] Time complexity analysis (Big-O)
- [ ] Appropriate data structure selection
- [ ] Remove unnecessary operations

### Memory

- [ ] Minimize memory allocation
- [ ] Object reuse (pooling)
- [ ] Cache-friendly access patterns

### Concurrency

- [ ] Minimize lock contention
- [ ] Leverage async I/O
- [ ] Thread pool optimization

### Caching

- [ ] Appropriate cache strategy
- [ ] Cache invalidation policy
- [ ] Cache hit rate monitoring

## Reference

- [Performance Guidelines](reference/performance.md)
- [Memory Management](reference/memory.md)
- [Concurrency](reference/concurrency.md)
- [Monitoring](reference/monitoring.md)

## Caution

> "Premature optimization is the root of all evil" - Donald Knuth
>
> Always confirm bottlenecks through profiling before optimizing.