Rspack

Excited to see a Cloudflare plugin for Rsbuild! Give it a try with TanStack Start and share your feedback github.com/james-elicx/...

We moved the Zephyr Cloud dashboard (1 host + 7 Module Federation remotes) from Rspack to Rsbuild 2, then let Rsdoctor 2 drive the cleanup. First load: −30% gzip Build: 112s → 90s 15-route journey: −39% Numbers 🧵

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

You can now select TanStack Start in create-rsbuild!

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!

We started Rsdoctor by visualizing build data for human developers. Now AI agents do much of the optimization work, so we’re making Rsdoctor more agent-friendly by giving them access to that data through our CLI

🦀 Rsdoctor 2.0 is here! ⚡ 40–60% faster analysis 📦 56% smaller install size 🤖 Agent-driven build analysis 🧩 One report for multi-compiler builds Explore what’s new 👇 rsdoctor.rs/blog/release...

Rspack 1.0 is only two years old, but these numbers make it feel a generation behind 🫢 I hope we’ll say the same about 2.x when 3.0 ships

A small milestone: 10M weekly downloads for Rspack Thank you for building with us ❤️

Running agents in parallel puts more pressure on memory. We’re making Rspack use less memory to help

We’re putting more focus on memory usage in Rspack and Rsbuild, especially for large codebases or when running multiple agents in parallel. Recent optimizations reduced peak dev memory by 19.5% in one large project, with faster startup and rebuilds too

Rstack!

Less code to ship!

Rspack's code splitting balances bundle size, chunk count, and build time. The next release adds `splitChunks.dedupDepth` to spend more time finding shared code and reducing duplication. In one real-world app with many routes, using this option cut total output size by 9.9%

We recently upgraded an internal monorepo from Rspack v1 to v2. Build time dropped ~45% Then we noticed the repo had added 4 million lines over the past 6 months. About 80% was TS, mostly written by agents Still plenty to do to keep Rspack and JS tooling fast enough for agents

Rspack will also get 2.4 MB smaller ⚡

SWC's binary just got 2.4MB smaller. Rspack and Turbopack could benefit too. Thanks @swwind233 for the optimizations

Great to see Vercel contributing to React Compiler's Rust implementation! Official crates are now available, so SWC and Rspack have switched from forked crates to the official ones.

DeepSeek's web app is now on Rspack v2! 🐋 🦀

TanStack Start + Rsbuild keeps getting faster 🚀 @CongCongPan optimized import-protection reporting, making SSR builds 23.4% faster and client builds 10% faster in a real-world project

We originally built Rslib to unify ByteDance’s web apps and JS libs around Rspack. Getting there wasn’t easy. Rspack inherited an architecture primarily designed for bundling apps, so we made many improvements to produce clean ESM for libs.

🦀 Rslib 1.0 is here! 📦 Multiple output formats, including Module Federation 🔀 Bundled or bundleless ⚛️ Component libraries across frameworks 🎨 Built-in CSS and asset support 🔵 TypeScript 7 support for fast declarations See what's new in Rslib 1.0 👇 rslib.rs/blog/v1-0

🤩 trilon.io/blog/nestjs-...

Interesting to see ESLint exploring a unified JS/TS parsing toolkit. Our approach in Rslint is to treat the TS 7 parser/compiler as the single source of truth. Linting and type checking share the same program, so each file only needs to be parsed once, and its AST can be reused

Cool to see Sentry already trying Rspack 2.2's new compact ID strategy, cutting gzipped JS by 152KiB. If all goes well, it'll be the default in a future minor release. We made a silly API typo and used "compat" instead of "compact". Guess we'll support both names😂

And Rstack ecosystem keeps shipping: 🦀 Rsbuild — Solid v2 support, Octane template 🦀 Rstest — Playwright E2E, Module Federation 🦀 Rslint — 500+ native rules, JS API 🦀 Rslib — TypeScript 7 support, v1.0 soon 🦀 Rspress — 100/100 agent-friendly score

🦀 Rspack 2.2.0 is out! 30+ performance optimizations: ⚡ Production build ~5% faster 🎨 CSS parsing 3.7× faster 📁 CopyRspackPlugin 3–4× faster 🔥 HMR skips unnecessary CSS ~385 → ~6 ms rspack.rs/blog/announc...

In the next release, Rsbuild will enable chunk splitting by default for Node.js builds. This reduces duplicate code across chunks and makes SSR apps more efficient. The benchmark below is a TanStack Start stress test case with many routes and shared modules:

Did you know? 🤯 Rspress just hit 100/100 (A+) for agent-friendly docs — Markdown access, llms.txt and more! 💯

Our designer is cooking up some fun new logos for the little crabs 🦀

GitLab plans to replace webpack with Rspack as the single engine across dev, prod, and CI 👀 Benchmarks results: 🍃 Prod build: 26× faster 🍃 Dev startup: 7× faster 🍃 Emitted JS: 25% smaller 🍃 Peak memory: 23% lower gitlab.com/gitlab-org/g...

Time to upgrade to Rspack v2!

Just noticed that Slack is using Rspack v2 Less than 4 months since launch, v2 already accounts for 30% of Rspack downloads and 40% of Rsbuild downloads Adoption is moving fast 🚀

I used to dislike webpack’s loader design, but over time I’ve come to appreciate just how much it gets right: • Easy to parallelize: Loaders are standalone modules, so they can run in workers with little effort. I saw Rspack’s parallel loader feature cut babel-loader time by 80% in one large app

We’re migrating a large internal project from ESLint to Rslint. Even with ESLint plugins running in JS, Rslint is 10× faster 🚀