Features
- High compatibility with Webpack loaders and plugins
- 5-10x faster than Webpack out of the box
- Built-in support for TypeScript, JSX, and CSS
- Incremental compilation for fast rebuilds
Pros
- Easy migration path from existing Webpack projects
- Massive speed improvement without rewriting config
- Active development by ByteDance (battle-tested internally)
Cons
- Not 100% Webpack-compatible, some plugins need adaptation
- Smaller community than Webpack or Vite
- Less mature ecosystem compared to established tools
Overview
Rspack is a high-performance JavaScript bundler written in Rust, developed by ByteDance. Its key differentiator is strong compatibility with the Webpack ecosystem. If you have a large Webpack project and want dramatically faster builds without a full rewrite, Rspack offers the most practical migration path.
Rspack achieves its speed through Rust’s performance characteristics and a parallelized architecture. It includes built-in support for common transformations like TypeScript, JSX, and CSS processing, reducing the need for external loaders. Where loaders are needed, it maintains compatibility with many existing Webpack loaders.
ByteDance uses Rspack internally across numerous large-scale applications, providing real-world validation at massive scale.
When to Use
Choose Rspack when migrating a large Webpack project to a faster build tool. It is the best option when Webpack compatibility is a hard requirement and a full migration to Vite is not feasible.
Getting Started
npm create rspack@latest my-app
cd my-app
npm install
npm run dev