Next.js
May 05, 20269 min
Caching in Next.js 15+: The Four Layers
Next.js has four overlapping caches. Most production bugs are misalignment between them — here's the map.
Next.jsPerformance
ReadNext.js for engineers who have to ship and maintain it — RSC vs Client mental model, the four caching layers, streaming SSR, Core Web Vitals, and the App Router patterns that actually scale.
2 articles · updated regularly
Next.js has four overlapping caches. Most production bugs are misalignment between them — here's the map.
React Server Components changed the default. Picking RSC vs Client well is now the single biggest perf decision in a Next.js app.