Vercel React Best Practices

It covers 70 rules across eight categories, from eliminating async waterfalls and bundle optimization (the critical stuff) down to JavaScript micro-optimizations. The real value is in how it prioritizes. Instead of dumping every best practice on you, it focuses on what actually moves the needle: parallel data fetching, avoiding barrel imports, proper use of React Server Components. Use it when writing or reviewing React/Next.js code and you want to catch performance footguns before they ship. The rules are specific enough to guide refactoring decisions, not just vague advice about "making things faster."