Building Performant React Apps in 2025

Performance is no longer optional — it’s a feature. This post covers modern techniques for React apps that feel instant.

Server Components First

React Server Components change how we fetch and render. Defaulting to the server dramatically shrinks the client bundle.

Smart Caching

Understanding Next.js cache layers — request memoization, data cache, and full route cache — is critical for sub-second loads.

Measure What Matters

Core Web Vitals remain the compass. LCP, INP, and CLS should guide every architecture decision.