React and Next.js performance optimization across 70 rules prioritized by impact.

• Organized into 8 categories from critical (eliminating waterfalls, bundle optimization) to low priority (advanced patterns), each with specific, actionable rules prefixed for easy reference
• Covers server-side performance including React.cache() deduplication, parallel fetching, and serialization minimization
• Addresses client-side concerns: re-render optimization through memoization and dependency management, rendering performance with CSS strategies and hydration patterns
• Includes JavaScript-level optimizations like DOM batching, caching, and Set/Map lookups for O(1) performance
• Each rule includes detailed explanations, incorrect and correct code examples, and contextual guidance for automated refactoring and code generation