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Rspack (@rspack_dev) profile picture

Rspack

@rspack_dev

Rstack is a lightning-fast JavaScript toolchain that includes Rspack, Rsbuild, Rslib, Rspress, Rsdoctor, Rstest and Rslint.

rspack.rs
Joined January 2023
  • Tweets1.4K
  • Following19
  • Followers9.2K
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🦀 Rspack 2.3 is here! 🚀 5–20% faster builds ⚡️ SWC Next parser 📉 Up to 27.4% lower peak build memory 📦 Less duplicate code across chunks 💾 ~79% less disk usage with the new cache 🎨 Improved built-in CSS rspack.rs/blog/announcing-2-…
Announcing Rspack 2.3 - Rspack

Announcing Rspack 2.3 - Rspack

Rspack 2.3 brings SWC Next, faster builds, lower memory usage, smaller bundles, a new experimental cache, loader caching, and built-in CSS improvements.

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SWC Next is now in Rspack! Just the parser for now, but this is only the beginning. Get ready for an even faster Rspack
Rspack (@rspack_dev) profile pictureRspack@rspack_devOct 29
🦀 Rspack 2.3 is here! 🚀 5–20% faster builds ⚡️ SWC Next parser 📉 Up to 27.4% lower peak build memory 📦 Less duplicate code across chunks 💾 ~79% less disk usage with the new cache 🎨 Improved built-in CSS rspack.rs/blog/announcing-2-…
Announcing Rspack 2.3 - Rspack

Announcing Rspack 2.3 - Rspack

Rspack 2.3 brings SWC Next, faster builds, lower memory usage, smaller bundles, a new experimental cache, loader caching, and built-in CSS improvements.

rspack.rs
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👀 If you’re new to SWC Next nitter.cf/rspack_dev/status/2115…
Rspack (@rspack_dev) profile pictureRspack@rspack_devOct 28
Rspack 2.3 will use SWC Next for JavaScript parsing. We plan to gradually migrate more of Rspack's internals to SWC Next and introduce a new swc-next-loader that supports custom transform plugins written in JavaScript.
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Rspack 2.3 will use SWC Next for JavaScript parsing. We plan to gradually migrate more of Rspack's internals to SWC Next and introduce a new swc-next-loader that supports custom transform plugins written in JavaScript.
Jiahan Chen (@jiahan_c) profile pictureJiahan Chen
@jiahan_cOct 28
SWC Next is here! Today, customizing how your code is transformed often means using Babel plugins or writing Wasm plugins for SWC. I believe the next generation of JS compilers should combine Rust's performance with the flexibility to write custom transform plugins in JavaScript. SWC Next's flat AST enables efficient data exchange between Rust and JS, laying the groundwork for fast JS plugins 🚀
Image from Jiahan Chen (@jiahan_c)
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Rspack retweeted
SWC (@swc_rs) profile picture
SWC
@swc_rsOct 28
Introducing SWC Next: the foundation for SWC’s next major version, built on a new architecture inspired by Yuku. - Up to 3x faster native parsing - Up to 10x faster parsing through the JavaScript API - A flat, ESTree-based AST designed for speed, memory efficiency, and JavaScript extensibility Starting with parsing, we’re bringing the rest of SWC to this new architecture. Built together by the SWC and Rstack teams.
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SWC Next is here! Today, customizing how your code is transformed often means using Babel plugins or writing Wasm plugins for SWC. I believe the next generation of JS compilers should combine Rust's performance with the flexibility to write custom transform plugins in JavaScript. SWC Next's flat AST enables efficient data exchange between Rust and JS, laying the groundwork for fast JS plugins 🚀
Image from Jiahan Chen (@jiahan_c)
SWC (@swc_rs) profile pictureSWC
@swc_rsOct 28
Introducing SWC Next: the foundation for SWC’s next major version, built on a new architecture inspired by Yuku. - Up to 3x faster native parsing - Up to 10x faster parsing through the JavaScript API - A flat, ESTree-based AST designed for speed, memory efficiency, and JavaScript extensibility Starting with parsing, we’re bringing the rest of SWC to this new architecture. Built together by the SWC and Rstack teams.
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🚀 Rstest 0.12.4 adds screenshot assertions. Catch visual regressions for pages and elements in Browser Mode. Compare against PNG baselines and inspect pixel diffs on mismatch.
Image from Rspack (@rspack_dev)
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Docs: rstest.rs/api/runtime-api/br… Release notes: github.com/web-infra-dev/rst…
Assertion - Rstest

Assertion - Rstest

expect.element is the API for DOM assertions in Browser Mode. It accepts a Locator or DOM Element and returns a chainable assertion object.

rstest.rs
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Rspack retweeted
Dennis Cual (@denCual) profile picture
Dennis Cual
@denCualOct 24
After migration to @rspack_dev Rsbuild, then try Rstest as a replacement for Jest. This reuse your Rsbuild config making your test runner behavior closer to your build and has single source. You can delegate the task to the agent. Meaning the annoying works when doing migration like replacing jest references to rs, changing the mocks, rewriting snapshots, etc majority of these will be handled by your agent. Just make sure you install Rstest skills and the agent is doing loop. Our average shard with jest in CI is around 11mins. Down to 2 mins with rstest. Its just fast!
Zack Jackson (@ScriptedAlchemy) profile pictureZack Jackson
@ScriptedAlchemyOct 23
Please don’t use rspack, use rsbuild. Only ever use rspack directly if you are porting off webpack.
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Fun fact: ChatGPT’s web app uses Rsbuild rather than using Rspack directly 👀
Zack Jackson (@ScriptedAlchemy) profile pictureZack Jackson
@ScriptedAlchemyOct 23
Please don’t use rspack, use rsbuild. Only ever use rspack directly if you are porting off webpack.
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Please don’t use rspack, use rsbuild. Only ever use rspack directly if you are porting off webpack.
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Some real-world gains from migrating to Rspack 👇
Ori Livni (@oriSomething) profile pictureOri Livni@oriSomethingOct 22
Replying to @oriSomething
Since, it’s easy to miss something in a complex pipeline, making Rspack more Vite-ish was important. The results: - JS requests down by ~95% - Bundle size (uncompressed) down by 5~21% - Bundle size (compressed) down by ~40% - Dev server got faster in about 2.5x [7/8]
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Rspack retweeted
James (@James_Elicx) profile picture
James
@James_ElicxOct 22
rsbuild-plugin-cloudflare v0.0.1 An experimental prototype that lets you run an rsbuild dev server inside workerd, and build apps that can be deployed with the cf cli. Built on the Vite plugin's internals Try it out with your TanStack Start apps today github.com/james-elicx/rsbui…
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Excited to see a Cloudflare plugin for Rsbuild! Give it a try with TanStack Start and share your feedback
James (@James_Elicx) profile pictureJames
@James_ElicxOct 22
rsbuild-plugin-cloudflare v0.0.1 An experimental prototype that lets you run an rsbuild dev server inside workerd, and build apps that can be deployed with the cf cli. Built on the Vite plugin's internals Try it out with your TanStack Start apps today github.com/james-elicx/rsbui…
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In the next release, Rspack will support `codeFilter` for loaders ⚡ Run a loader only on modules containing specific code, such as a "use foo" directive. Skip unnecessary transforms and speed up your builds
Image from Jiahan Chen (@jiahan_c)
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Rspack retweeted
Néstor (@nstlopez) profile picture
Néstor
@nstlopezOct 20
We moved the Zephyr Cloud dashboard (1 host + 7 Module Federation remotes) from Rspack to Rsbuild 2 by @rspack_dev, then let Rsdoctor 2 drive the cleanup. First load: 1,045 → 729 KB gzip (−30%) Build: 112s → 90s (−20%) 15-route journey: 1,294 → 788 KB (−39%) Numbers 🧵
Image from Néstor (@nstlopez)
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Rspack retweeted
Edouard Bozon (@edbzn) profile picture
Edouard Bozon@edbznOct 19
In 2025, I wrote about Rspack in Angular. 2026 update: 🔹 Now @nx/angular-rspack 🔹 i18n, SSG, HMR, SSR app engine supported 🔹 Rspack 2.0 ready 🔹 8× faster than Webpack, on par with esbuild On Webpack with Module Federation? Look at it. On esbuild? Stay. edbzn.dev/blog/state-of-rspa…
State of Rspack in Angular: 2026 Update · edbzn.dev

State of Rspack in Angular: 2026 Update · edbzn.dev

Twenty months after the first article, a look at where Rspack in Angular stands today, what the Nx team shipped, what Angular changed on its side, and whether it is worth the switch.

edbzn.dev
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You can now select TanStack Start in create-rsbuild too
Image from Jiahan Chen (@jiahan_c)
Cong-Cong Pan (@CongCongPan) profile pictureCong-Cong Pan@CongCongPanOct 19
TanStack CLI now supports Rsbuild! 🦀 Create your next TanStack app with: npx @tanstack/cli create my-app Select React → Rsbuild, and start building.
Image from Cong-Cong Pan (@CongCongPan)
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We also see an extremely high correlation in the adoption of module federation and a product teams adoption of ai. Even pre-ai, teams who adopt federation average 3x increase in product output.
Jiahan Chen (@jiahan_c) profile pictureJiahan Chen
@jiahan_cOct 17
Replying to @jiahan_c
We’re also pushing Rstack and MF further within ByteDance, where we continually find and address bottlenecks in codebases with 10M+ lines of code nitter.cf/scriptedalchemy/status…
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Rspack now powers massive codebases at some of the world’s largest companies, and feedback from these teams keeps making it better. Engineers at Microsoft and OpenAI have contributed over 100 PRs and issues. Thank you for all the contributions!
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