Suggest an editImprove this articleRefine the answer for “Why is Turbopack written in Rust?”. Your changes go to moderation before they’re published.Approval requiredContentWhat you’re changing🇺🇸EN🇺🇦UAPreviewTitle (EN)Short answer (EN)Turbopack is written in **Rust** because this language combines high speed, safety, and predictability, which JavaScript-based tools lack when working with large projects and complex dependency graphs. **Key point:** Rust provides maximum speed, safety, and efficient parallelism, making it better suited for the new generation of ultra-fast build tools.Shown above the full answer for quick recall.Answer (EN)ImageTurbopack is written in **Rust**, because this language combines high speed, safety, and predictability, which JavaScript-based tools lack when working with large projects and complex dependency graphs. --- ### **Reason 1 - Performance** Rust compiles to machine code and runs significantly faster than JS. For a bundler this is critical, because it: - parses thousands of files, - builds a dependency graph, - performs transformations, - rebuilds parts of the project during HMR. Rust makes it possible to perform these tasks **several times faster** than Node.js. --- ### **Reason 2 - Memory safety** Rust guarantees safety at the compiler level: no memory leaks, data races, or crashes from careless resource handling. For a complex build tool this matters, because: - the build must be stable and predictable, - errors should be caught at compile time, not at runtime. --- ### **Reason 3 - Working with parallelism** Rust scales well on multi-core systems. In a bundler this makes it possible to: - process files in parallel, - cache efficiently and incrementally rebuild only the changed modules. --- ### **Reason 4 - Webpack's limitations** Webpack is written in JS and hits the speed limits of an interpreted language. Turbopack was created as its "successor", so Rust was a logical choice for solving the performance problem. --- ### **Summary** Turbopack is written in Rust because Rust provides **maximum speed, safety, and efficient parallelism**, making it better suited for the new generation of ultra-fast build tools.For the reviewerNote to the moderator (optional)Visible only to the moderator. Helps review go faster.