Practical Caching Recipes for Next.js (App Router)

A comprehensive guide to implementing caching strategies in Next.js App Router, covering segment-level caching, fetch caching with ISR, tag-based revalidation, Route Handler cache headers, Server Actions, and client-side SWR. Includes practical code snippets for static vs dynamic rendering, webhook-based cache invalidation, HTTP cache headers, and common pitfalls to avoid when optimizing page performance.