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What is Turbopack in Next.js and how does it compare to Webpack?

Q: What is Turbopack in Next.js and how does it compare to Webpack?

**TL;DR.** **Turbopack** is Next.js's **Rust-based bundler** designed to replace Webpack, offering **much faster cold starts** and **incremental updates (HMR)** via fine-grained caching. It's the **default for next dev ** in recent versions; Webpack remains the fallback while Turbopack's production builds mature. Webpack (JS) mature, slower large plugin ecosystem Turbopack (Rust) fast, incremental</te

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The Rust-based bundler for faster dev.

nextjsturbopackwebpackbundler

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Run dev with Turbopack

next dev --turbopack     # faster cold start + HMR (default in recent Next)
# Fall back to Webpack if a custom loader/plugin isn't yet supported:
next dev

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