Next.js 16.3 release cuts memory usage by up to 90% and speeds builds

The core team behind the open‑source React framework Next.js launched version 16.3, introducing major memory and performance improvements. By leveraging Turbopack – Vercel’s high‑performance incremental bundler that replaces Webpack – the new release reduces memory consumption by as much as 90%, dropping typical usage from several gigabytes to under two gigabytes for large projects. Disk caching and default memory eviction further curb RAM demand.

Benchmarks from Vercel show compilation time improvements of roughly 2.3 times, with a build that previously took 21 seconds now completing in about 9 seconds. An experimental Rust‑based React Compiler is also included, aiming to streamline memoization.

These changes are backwards‑compatible and target developers who run complex React applications, offering faster rendering and lower resource costs without requiring code changes.