Rspack Has a Free Bundler That's 10x Faster Than Webpack — Drop-In Compatible, Written in Rust

The Webpack Speed Problem

Webpack builds take 30-60 seconds. Hot reload: 2-5 seconds. Every developer waits thousands of hours per year for webpack to finish.

Rspack is a Webpack-compatible bundler written in Rust. Same config format. Same plugin API. 10x faster.

What Rspack Gives You

Webpack Config Compatibility

// rspack.config.js — looks familiar?
module.exports = {
  entry: './src/index.ts',
  output: {
    filename: '[name].[contenthash].js',
    path: path.resolve(__dirname, 'dist'),
  },
  module: {
    rules: [
      { test: /\.tsx?$/, use: 'builtin:swc-loader' },
      { test: /\.css$/, use: ['style-loader', 'css-loader'] },
    ],
  },
};

Most webpack configs work with minimal changes.

Performance

	Webpack 5	Rspack
Cold build (large app)	30s	3s
Hot reload	2s	200ms
Production build	60s	8s

Built-In Features (No Extra Plugins)

module.exports = {
  builtins: {
    // TypeScript — no ts-loader needed
    // CSS — built-in CSS extraction
    // HTML — built-in HTML plugin
    // Code splitting — automatic
  },
};

SWC Integration

Built-in SWC loader for TypeScript, JSX, and modern JavaScript. No Babel needed.

Webpack Plugin Compatibility

Many webpack plugins work out of the box:

• HtmlWebpackPlugin → built-in
• MiniCssExtractPlugin → built-in
• DefinePlugin → built-in
• CopyWebpackPlugin → compatible

Migration Guide

# 1. Install
npm install @rspack/core @rspack/cli

# 2. Rename
mv webpack.config.js rspack.config.js

# 3. Update scripts
# "build": "webpack" → "build": "rspack build"
# "dev": "webpack serve" → "dev": "rspack serve"

Quick Start

npm create rspack@latest
cd my-app
npm run dev

Why This Matters

Millions of projects use Webpack and can't switch to Vite without rewriting configs. Rspack gives them 10x speed with zero rewrite.

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