JavaScript scope hoisting is broken
7/6/2025 Most modern JavaScript bundlers implement an optimization called "scope hoisting". The idea is that rather than wrapping each bundled module in a function, a compiler concatenates the modules into a single scope. Say you have a program like this: // index.js import {add} from './math'; console.log(add(2, 3)); // math.js export function add(a, b) { return a + b; } When scope hoisted, the o
How We Reduced CKEditor’s Bundle Size by 40% | CKEditor
In this article, we’ll show how we cut CKEditor 5’s bundle size by 40% through tree-shaking and bundle size optimization techniques and share tricks you can use to slim down your own JavaScript libraries. We’ll also walk through the tools and processes we used to achieve this, measure improvements, and catch regressions. As any software library author will tell you, building and maintaining is har
Mako - Extremely fast, Production-grade web bundler
An extremely fast, production-grade web bundler based on Rust. Mako is a new web bundler for Web App, Library, and Framework. It's designed to be fast, reliable, and easy to use. It has been used in hundreds of projects in production by Ant Group, and other companies. If you are looking for a modern web bundler, Mako is the right choice. Getting Started $ npm create mako Why Mako Mako has a lot of
Rspack
May 28, 2024 Announcing Rspack 0.7# Rspack v0.7 has been released! This is the last minor release before the Rspack v1.0. After this, the Rspack team will focus on the development of v1.0 and aim to launch the Rspack v1.0 alpha version soon. Notable changes in Rspack v0.7: Support for Lazy Compilation: Significantly improves the dev startup performance of large applications by compiling on demand.
Release v0.21.0 · evanw/esbuild
This release doesn't contain any deliberately-breaking changes. However, it contains a very complex new feature and while all of esbuild's tests pass, I would not be surprised if an important edge case turns out to be broken. So I'm releasing this as a breaking change release to avoid causing any trouble. As usual, make sure to test your code when you upgrade. Implement the JavaScript decorators p
Release 🚀 Farm v1.0 is released! · farm-fe/farm
Farm⭐️ is a next-generation web build tool written in Rust. It is currently the most powerful, fastest, and most stable Rust web build tool. Since Farm open its source code of version 0.3 in March 2023, after a year of development and contributions by many community developers, version v1.0 has finally been released! The v1.0 version supports a large number of features including lazy compilation,
Parcel v2.12.0
Parcel v2.12.0 introduces support for macros, which enable you to generate code at build time using regular JavaScript functions. It also includes a new online REPL, improves our CSS bundling support, adds configuration options to fine tune your app's code splitting, and improves performance and memory usage. Macros Parcel v2.12.0 introduces support for macros. Originally implemented in Bun, Macro
Rspack
RspackThe fast Rust-based web bundler Seamlessly replace webpack with compatible API Why Rspack?Rspack is a high performance JavaScript bundler written in Rust. It offers strong compatibility with the webpack ecosystem, allowing for seamless replacement of webpack, and provides lightning fast build speeds. Fast StartupCombining TypeScript and Rust with a parallelized architecture to bring you the
How we reduced the size of our JavaScript bundles by 33%
When was the last time you were about to click a button on a website, only to have the page shift—causing you to click the wrong button instead? Or the last time you rage-quit a page that took too long to load? These problems are only amplified in applications as rich and interactive as ours. The more front-end code is written to support more complex features, the more bytes are sent to the browse
Design Trade-offs in Bundler: The Rationale Behind Creating Rspack · web-infra-dev · Discussion #1
chinese version Before embarking on the development of Rspack, we explored various build tools and frameworks, including extensive use of Webpack, Vite, esbuild, and Rollup in real-world production environments. To provide some context, our team, known as the WebInfra Team, is responsible for overseeing the company's suite of front-end build tools and frameworks. Some of these are open-source, whi
Release 0.2.5 · web-infra-dev/rspack
What's Changed Exciting New Features 🎉 feat(config): zod schema for output by @xinxinhe1810 in #3595 feat: filename per entry by @ahabhgk in #3662 feat: worker support by @ahabhgk in #3617 feat: support module decorator to give warning for mix harmony-commonjs by @underfin in #3667 Bug Fixes 🐞 fix(commonjs_scanner): ignore unresolve require span by @suxin2017 in #3591 fix: 🤖 pr number by @IWANA
Parcel v2.8.0
We are excited to announce the release of Parcel v2.8.0! This release includes a brand new bundling algorithm with improved automatic code splitting, much better build performance for large projects, and fixes for many bugs. It also includes major performance improvements for HMR updates, and tree shaking changes that we've seen reduce bundle sizes by up to 50%. New bundling algorithm Since our in
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[Tracking]: Rspack v1.0 · Issue #6689 · web-infra-dev/rspack
GitHub - farm-fe/farm: Extremely fast Vite-compatible web build tool written in Rust
GitHub - azu/omit-dev-label-on-production: esbuild --drop-labels=DEV example
Release v0.18.13 · evanw/esbuild
Parcel v2.9.0
Release v0.1.12 · web-infra-dev/rspack
Release v0.17.5 · evanw/esbuild
Release v2.7.0 · parcel-bundler/parcel