Bundling Speed
- tsup:
tsupleveragesesbuildfor bundling, which means it inherits the speed advantages ofesbuild. It is designed to be fast and efficient, making it a great choice for quick builds with minimal configuration. - esbuild:
esbuildis known for its incredible speed, often completing tasks in a fraction of the time compared to traditional bundlers. It is written in Go, which contributes to its performance, making it ideal for projects where build time is a concern. - rollup:
rollupis generally slower thanesbuild, but it provides excellent tree-shaking capabilities, which can result in smaller final bundles. The speed is acceptable for most library projects, but it may not be as fast for large applications. - webpack:
webpackis known for its flexibility but can be slower than other bundlers, especially for large projects with complex configurations. However, its performance can be optimized with techniques like code splitting, caching, and using thewebpack-dev-serverfor faster development builds.
Tree Shaking
- tsup:
tsupalso supports tree shaking, leveragingesbuildandrollupunder the hood. It provides good tree-shaking capabilities with minimal configuration, making it efficient for both library and application bundling. - esbuild:
esbuildsupports tree shaking out of the box, which helps eliminate unused code during the bundling process. It is efficient and works well with ES modules, making it suitable for modern JavaScript applications. - rollup:
rollupis renowned for its superior tree-shaking capabilities, especially for library bundling. It analyzes the entire module graph and removes unused exports, resulting in smaller bundles. This makes Rollup the preferred choice for projects where output size is critical. - webpack:
webpacksupports tree shaking, but it requires proper configuration and the use of ES modules for optimal results. While it is effective, it may not be as efficient as Rollup, especially in terms of eliminating unused code.
Configuration Complexity
- tsup:
tsupis focused on zero-config bundling, making it extremely easy to use, especially for TypeScript projects. It automatically handles many configurations, allowing developers to get started quickly without extensive setup. - esbuild:
esbuildis designed to be simple and requires minimal configuration. Its API is straightforward, making it easy to integrate into projects without a steep learning curve. - rollup:
rolluprequires some configuration, especially for advanced features like plugins and custom output formats. However, it is generally considered more straightforward than Webpack, especially for library projects. - webpack:
webpackis highly configurable but can be complex and daunting for beginners. Its flexibility comes with a steep learning curve, and setting up a Webpack configuration can be time-consuming, especially for large projects.
Code Splitting
- tsup:
tsupsupports code splitting as well, leveraging the capabilities ofesbuildandrollup. It allows developers to create split bundles with minimal configuration, making it a great choice for both libraries and applications. - esbuild:
esbuildsupports code splitting, allowing developers to split their code into smaller chunks that can be loaded on demand. This feature helps improve the performance of large applications by reducing the initial load time. - rollup:
rollupalso supports code splitting, making it easy to create multiple output files from a single entry point. This feature is particularly useful for creating libraries and applications that benefit from on-demand loading of modules. - webpack:
webpackis known for its powerful code splitting capabilities, allowing for highly customizable chunking strategies. It provides fine-grained control over how and when code is split, making it ideal for large applications that require optimized loading.
Ease of Use: Code Examples
- tsup:
Quick Setup with
tsupecho "export const hello = () => 'Hello, tsup!';" > hello.js echo "import { hello } from './hello.js'; console.log(hello());" > index.js # Bundle with tsup npx tsup index.js - esbuild:
Simple Bundling with
esbuildecho "const x = () => { console.log('Hello, World!'); };" > index.js npx esbuild index.js --bundle --outfile=bundle.js - rollup:
Basic Rollup Configuration
echo "export const greet = () => { console.log('Hello from Rollup!'); };" > greet.js echo "import { greet } from './greet.js'; greet();" > main.js # rollup.config.js import { nodeResolve } from '@rollup/plugin-node-resolve'; export default { input: 'main.js', output: { file: 'bundle.js', format: 'iife', }, plugins: [nodeResolve()], }; # Build with Rollup npx rollup -c - webpack:
Basic Webpack Setup
echo "const greet = () => { console.log('Hello from Webpack!'); };" > index.js echo "module.exports = { greet };" > greet.js # webpack.config.js const path = require('path'); module.exports = { entry: './index.js', output: { filename: 'bundle.js', path: path.resolve(__dirname, 'dist'), }, }; # Build with Webpack npx webpack --config webpack.config.js
