Hyeseong Kim
Integration engineer / Open source hitchhiker / DX enthusiast
@rescript-lang.org committer
- github.com/agavra/compr... I'm on rank #4. Couldn't get a medal 😂
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- Glad to be part of the great community 😄
- today we distributed some of our sponsors fund to a few people for their great work: - @hyeseong.kim - @webpro.nl - @devminer.xyz - @superchupu.dev - @lukeed.bsky.social thanks so much to you all for being part of the community and helping out so many of us. your work is incredibly valuable 💙
- Reposted by Hyeseong Kimtoday we distributed some of our sponsors fund to a few people for their great work: - @hyeseong.kim - @webpro.nl - @devminer.xyz - @superchupu.dev - @lukeed.bsky.social thanks so much to you all for being part of the community and helping out so many of us. your work is incredibly valuable 💙
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- Yarn's codebase is so well-structured that I expected it to be easy to port to other languages. Good code architecture wins over minor optimizations in the long run.
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- Reposted by Hyeseong KimGot my website running live on my zero-allocation (ish) OxCaml webserver! First of a series of posts on building out our planetary computing system infrastructure using the performance extensions in the Jane Street fork of OCaml. anil.recoil.org/notes/oxcaml... (and thanks @thenumb.at for tips)
- Reposted by Hyeseong KimThe @e18e.dev project, which systematically speeds up the Node.js ecosystem, has published its 2025 results. Invisible heroes who make life better for all of us. They need our support. e18e.dev/blog/the-yea...
- Reposted by Hyeseong KimAfter a whirlwind 2025, we took a pause to reflect on what 2026 might bring, and how Bluesky can help build the sort of future we all want to see online. Check out a few of our predictions, and let us know if you agree: bsky.social/about/blog/0...
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- Reposted by Hyeseong KimIt’s happening. Yarn 6 Preview is here 💫 Yes, we rewrote it in Rust 🦀⚡️ I'm incredibly excited for the future of our beloved package manager. See the benchmarks and plans in our latest post:
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- Reposted by Hyeseong Kimhere's a brief look ahead at what we have planned in the e18e community for 2026 🎉 great collaborations, and many useful developer tools are in the works. also a huge thanks to all who contributed so far - many of the libraries, tools, and frameworks we use today are faster because of you 💙
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- Reposted by Hyeseong KimBig news! Google have sponsored the @e18e.dev community $10k via their Chrome performance fund 🎉 I'm very thankful we've managed to create a space and a community people appreciate. Sponsorships like this will benefit the ecosystem, not just this community
- Reposted by Hyeseong KimRolldown 1.0 RC is here 🎉 🔒 Stable API: No breaking changes planned before 1.0 ⚡ 10-30x faster than Rollup while staying compatible 🧩 Multiple chunking algorithm improvements 📦 3,400+ commits since beta: 749 features, 682 fixes, 109 perf optimizations
- I was hoping that using Capn' Proto in the Rust-JS interop project would provide good performance at the expense of some inconvenience. However, there was no good JS libraries (capnp-es is painfully slow) So I asked Opus to do this. Perf and convenience, choose both github.com/cometkim/rky...
- Reposted by Hyeseong KimWe are joining Cloudflare! astro.build/blog/joining...
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- I hoped ReScript corrects the bad parts of JS more, instead of emulating them. It seems hard to resist getting familiar with JS if there are real users from JS. Maybe I should go to my own experimental language?
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- Reposted by Hyeseong KimWe appreciate your patience and understanding as we work to deliver a secure and reliable release. Updates are now available for the 25.x, 24.x, 22.x, 20.x Node.js release lines to address: - 3 high severity issues - 4 medium severity issues - 1 low severity issue nodejs.org/en/blog/vuln...
- Reposted by Hyeseong KimFirefox 147 just landed & it's pretty huge in terms of web features: 🎉 CSS anchor positioning 🎉 The navigation API 🎉 View transition types 🎉 Brotli support in Compression/DecompressionStream 🎉 CSS module imports And more! developer.mozilla.org/en-US/docs/Mozilla/…
- Reposted by Hyeseong Kim⚠️ JPEG XL landed in Chromium! ⚠️
- Reposted by Hyeseong KimTemporal is the Date system we always wanted in JavaScript. It's extremely close to being available so Mat Marquis thought it would be a good idea to explain exactly what is better about this new JavaScript date system. piccalil.li/blog/date-is...
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- Reposted by Hyeseong KimFinished two retrospective blog posts on the journey of require(esm) before 2025 ends: joyeecheung.github.io/blog/2025/12... joyeecheung.github.io/blog/2025/12...
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- Reposted by Hyeseong KimFacebook's Static Hermes is kind of incredible. It can compile JavaScript into C, which is then optimized into native machine code. I just compiled the Less.js source code into a C library. Then I called it from Rust as a native Parcel plugin (no Node). Wild. 👨🔬 devongovett.me/blog/static-...
- Intl.Segmenter is behaving differently across browsers. What should I follow? github.com/cometkim/uni...
- github.com/rescript-lan... This now emits the correct output for my ReScript libraries. Try with yours, and tell me what you think.
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- Status: Essential tasks are done. Emit TypeScript or dts. Import/export and type aliasing works properly. Now cooking advanced features like module types, opaque types and external types.
- Iterator is the most misused interface in JS.
- Guess what's coming
- I liked the experience of OCaml "fail fast" error reporting, rather than reporting every possible error combination at once. It is also very friendly to coding agents today.
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- `unicode-segmenter/grapheme` (alternative to Intl.Segmenter and graphemer) is now only 3.4KB mingzipped. github.com/cometkim/uni...
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- Reposted by Hyeseong KimMy colleagues ar @igalia.com worked on this. I wrote about it in bkardell.com/blog/blessin...
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- Reposted by Hyeseong KimCloudflare is aware of, and investigating an issue which potentially impacts multiple customers. Further detail will be provided as more information becomes available. Follow our updates here: www.cloudflarestatus.com/incidents/8g...
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- clever
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