nextjs-turbopack

Turbopack accelerates hot module replacement in large Next.js apps by using incremental bundling to rebuild only changed modules, drastically reducing wait times during code edits.

Slow cold starts in Next.js development are caused by bundling the entire codebase on initialization; Turbopack uses file-system caching to reuse previous work and accelerate restarts.

To enable Turbopack for Next.js development, run the next dev command to start the development server with Turbopack enabled and observe faster hot updates.

Turbopack requires Next.js 16 or higher to function, but you can fall back to Webpack if Turbopack encounters issues or is disabled by configuration.

Turbopack is a Rust-based bundler providing incremental rebuilds and file-system caching for faster local iteration, whereas Webpack is the traditional fallback bundler for Next.js configurations.

You should not use Turbopack and should fall back to Webpack when Turbopack encounters issues, fails to bundle specific modules, or is explicitly disabled by your project configuration.