turbopack

name	turbopack
description	Turbopack Rust-powered bundler. Use for fast builds.

Turbopack

Turbopack is the build engine built by Vercel. In 2025, it is Stable in Next.js and powers the fastest dev server in the ecosystem.

When to Use

• Next.js: It's the default dev engine (next dev --turbo).
• Scale: Designed for monorepos with thousands of pages.

Core Concepts

Incremental Computation

Turbopack never does the same work twice. It caches function results at a granular level (the "Function Level Caching").

Lazy Bundling

It only bundles the dynamic imports and pages you actually visit.

Request Level Compilation

Compiles code only when a request hits the server.

Best Practices (2025)

Do:

• Use --turbo: Enable it in Next.js for instant HMR.
• Trust the Cache: Turbopack handles invalidation correctly.

Don't:

• Don't configure it manually: In 2025, it's mostly configured via framework adapters (Next.js).

References

• Turbopack Documentation