· 4 min read
A Practical Next.js Performance Checklist
The highest-impact checks for faster pages and smaller client bundles.
Keep the server boundary high
Render content on the server by default and isolate stateful interactions into small client components. This reduces hydration work and JavaScript transfer.
Prioritize the real critical path
Preload only the primary image and font resources required for the first view. Lazy-load maps, secondary images, and optional widgets.
Measure production output
Track Core Web Vitals, route payload sizes, cache behavior, and third-party cost using production builds and real-user monitoring.