Next.js 16.3 update

Next.js 16.3 is the biggest framework update since 16.0, and most of the improvements ship with zero code changes.
What every project gets:
Up to 90% less memory in dev - Turbopack now uses disk caching and memory eviction by default. Real case: a 50-route app dropped from ~4.6GB to ~840MB RAM
Up to 5.5x faster repeat builds, thanks to the same disk cache now working with next build too
Up to 22% more requests under load - SSR moved from Web Streams to native Node.js streams
TypeScript 7-10x faster type checking
Edge runtime is now officially deprecated
Separately - Instant Navigations, opt-in features rethinking navigation in server-driven apps:
→ Partial Prefetching - instead of an aggressive full-page prefetch on every link, one reusable "shell" per route, cached for the session → Instant Insights - a devtool that automatically catches navigations that weren't instant and hands you a fix prompt → Better ISR - pages without a build-time prerender now show an instant shell to the first visitor instead of a blocking load → Navigation Inspector - visual debugging of loading states in dev → Playwright helper instant() - catches regressions when a navigation stops being instant after a refactor
This will become the default in the next major version - worth a look now.
https://lnkd.in/dXMz9jYH

nextjs #frontend #webdev #reactjs