Next.js 16.3 slashes dev server memory use and accelerates builds

Next.js 16.3 introduces major performance boosts, cutting developer server memory usage by up to 90% and delivering builds up to 5.5 times faster with improved disk caching.

Server-side rendering now handles up to 22% more requests under load, and TypeScript 7 support brings faster type checking in builds.

The release also includes the opt-in Instant Navigations suite for SPA-like responsiveness and further developer-focused improvements.