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Performance Standards

Frontend Performance

Code splitting and lazy loading for routes
React.memo only when measured benefit
Virtual scrolling for long lists
Image optimization (next/image or similar)
Bundle analysis and tree shaking
Preload critical resources
Minimize main thread work

Backend Performance

Database indexes on query fields
Connection pooling
Redis caching for frequent data
Pagination for large results
Async/await throughout
Background jobs for heavy processing
Query optimization (avoid N+1)

General Optimization

Measure before optimizing
Focus on perceived performance
Cache strategically
Compress responses (gzip/brotli)
CDN for static assets
Database query optimization
Load balancing for scale