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+# Performance Optimization Reference
+
+Reference materials for performance metrics, profiling tools, and optimization patterns.
+
+## Reference Materials
+
+### Performance Metrics
+**File**: [performance-metrics.md](performance-metrics.md)
+
+Complete guide to measuring and tracking performance:
+- Web Vitals (LCP, FID, CLS, TTFB)
+- Backend metrics (latency, throughput, error rate)
+- Database metrics (query time, connection pool)
+- Memory metrics (heap size, garbage collection)
+- Lighthouse scores and interpretation
+
+**Use when**: Setting up monitoring, establishing performance budgets, tracking improvements.
+
+---
+
+### Profiling Tools
+**File**: [profiling-tools.md](profiling-tools.md)
+
+Tools for identifying performance bottlenecks:
+- Chrome DevTools (Performance, Memory, Network panels)
+- Node.js profiling (--inspect, clinic.js, 0x)
+- React DevTools Profiler
+- Database query analyzers (EXPLAIN, pg_stat_statements)
+- APM tools (DataDog, New Relic, Sentry)
+
+**Use when**: Investigating slow performance, finding bottlenecks, profiling before optimization.
+
+---
+
+### Optimization Patterns
+**File**: [optimization-patterns.md](optimization-patterns.md)
+
+Catalog of common optimization patterns:
+- Algorithm patterns (Map lookup, binary search, memoization)
+- Database patterns (eager loading, indexing, caching)
+- Caching patterns (LRU, cache-aside, write-through)
+- Frontend patterns (lazy loading, code splitting, virtualization)
+- Backend patterns (pooling, batching, streaming)
+
+**Use when**: Looking for proven solutions, learning optimization techniques.
+
+---
+
+## Quick Reference
+
+| Resource | Focus | Primary Use |
+|----------|-------|-------------|
+| **Performance Metrics** | Measurement | Tracking performance |
+| **Profiling Tools** | Analysis | Finding bottlenecks |
+| **Optimization Patterns** | Solutions | Implementing fixes |
+
+## Navigation
+
+- **Examples**: [Examples Index](../examples/INDEX.md)
+- **Templates**: [Templates Index](../templates/INDEX.md)
+- **Main Agent**: [performance-optimizer.md](../performance-optimizer.md)
+
+---
+
+Return to [main agent](../performance-optimizer.md)