Rolldown
@rolldown_rs
Fast Rust-based bundler for JavaScript with Rollup-compatible API.
Good linting diagnostics like this help AI understand it better too!
🚀 @rolldown_rs now enables `output.minifyInternalExports` by default. This feature shortens internal export names by using the `as` keyword. At first glance your bundle may look bigger... …but the additional `as` unlocks improved minification. Real World impact: Total…
This advanced optimization basically makes optimization (SSR) speed independent from the amount of pages (with variations) you have. Great for large sites with A/B testing and multiple languages. We even pre-render your top pages. Blog post soon. Great work @heypiotr
Introducing Dynamic Optimization, an all-new way of optimizing your published websites. All sites now optimize in seconds, even large ones. And adding pages has no impact on optimization time. Publishing, now even faster. Only in @framer.
I’m always down!
🚀 Rolldown v1.0.0-beta.44 is out! 💥 Breaking Changes - `jsx` → `transform.jsx` - Enabled `minifyInternalExports` by default 🎯 Enhanced Tree-Shaking - JSON default imports tree-shakeable - Typed array constructors marked as pure 📖 More details: github.com/rolldown/rolld…
![dalaoshv's tweet card. [1.0.0-beta.44] - 2025-10-20 💥 Breaking Changes Top-level jsx removed, use transform.jsx instead output.minifyInternalExports now enabled by default 🎯 Enhanced Tree-Shaking JSON default imports ...](https://pbs.twimg.com/card_img/1985239991144869888/3GM9A3Ce?format=jpg&name=orig)
In the next version of Rolldown, you can automatically clean up the previous build when rebuilding by setting `output.cleanDir` to true 🧹 Thanks to @aprosail for the contribution! github.com/rolldown/rolld…
In the next version of Rolldown, bundling will be ~10% faster 🎉 This was achieved by optimizing the semantic scoping process Internal plugins like define and inject now flag when they haven't changed the AST, allowing to skip redundant scope recreation github.com/rolldown/rolld…
Over the course of the beta phase, @rolldown_rs got 33% faster while adding *more* features and now produces 34.5% smaller bundles. It's now faster than esbuild, faster than bun, 3x faster than rspack, with bundle size comparable (+/-0.006%) to the state of art (rspack + swc…
.@rolldown_rs just crossed 1m weekly downloads last week and now we are at 1.7m 😱 And we haven't even shipped rolldown-vite stable yet
Said no one ever👀
State of JS 2025 Christmas is only 3 months away, which means it is also time to take the State of JavaScript survey (again). The more devs participate, the clearer the big picture will be in the end 🙌 survey.devographics.com/survey/state-o… Plus, you learn about features, libs, and…
Am I really that popular? 😲
Another beta - another bunch of improvements 🔥 Also includes changes from the latest Oxc version!
Rolldown v1.0.0-beta.39 has been released! ⚡ macOS Performance Boost: 10%-30% faster bundling, up to 45% in extreme cases. 🎯 Cross-Chunk Optimization: Support for __NO_SIDE_EFFECTS__ annotation, as well as better tree-shaking across module boundaries and more efficient DCE
☂️ Rolldown Q4 Plan * Full bundle mode * Lazy compilation * Integrating importmaps to Vite * Features to improve bundle size * Lazy barrel optimization * More cross-chunk optimizations * ts const enum optimization * Stablize native vite plugins * tsconfig discovery *…
💨💨💨
Windows users, I have a good news for you. In the next version, Rolldown will become ~10% faster on Windows — even up to 29% faster in some cases! 🚀
More accurate source maps in Rolldown In the next version of @rolldown_rs, more accurate source maps are generated. This is especially helpful for debugging! A great example is when an error occurs while trying to access a property. Before, the source map pointed to the right…
Rolldown X Framer
We now use @rolldown_rs as our high-performance bundler at @framer. Faster publishing, smarter code optimization, and quicker loading for your returning visitors.
Rolldown drops CJS support From the latest version of @rolldown_rs (1.0.0-beta.36) on, Rolldown will only be shipped in ESM format. The required Node version has also been bumped to align with @vite_js (20.19+ and 22.12+). Node 18 has been dropped due to being EOL since April.
It would be appreciated if @OxcProject and @rolldown_rs gets a little vote 😃
🌟 Nominations are open for the 2025 JavaScriptLandia Awards! 🌟 Know someone making a difference in the JavaScript community? Nominate them for recognition in one of these categories: - Unsung Hero - Leading by Example - Outstanding New Arrival - Pathfinder for Security,…
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