Hyeseong Kim
@hyeseong.kim
Integration engineer / Open source hitchhiker / DX enthusiast @rescript-lang.org committer
An enormous amount of the world’s CI and automation runs headless Chrome, all of it on x86—until last week. Chrome now ships official arm64 Linux builds. AWS says Graviton uses up to 60% less energy for the same performance. Chrome for Testing coming soon 🥳 calibreapp.com/blog/chrome-...
Chrome lands on arm64 | Calibre
Google has shipped official arm64 Linux builds of Chrome. Here’s where to get them, and why it’s good news for anyone running browser automation.
calibreapp.com
Cloudflare OS is an open-source platform that lets everyone in your company build apps, automate work, and safely access internal systems, shaped around what your organization knows and how it operates. https://cfl.re/4fGBl0w
Cloudflare OS: an open platform for agents, apps, and work
Cloudflare OS gives every person an agent and workspace built around their company: how it works, what it knows, and the systems it relies on.
blog.cloudflare.com
gRPC support is now available in Cloudflare Workers. You can now route, transform, and serve gRPC services natively at the edge without maintaining dedicated proxy infrastructure or translation layers. Read the launch post: https://cfl.re/4fMsitT
Cloudflare Workers and Containers now support inbound TCP connections and gRPC
Cloudflare Workers now support inbound TCP connections via Spectrum, allowing direct socket forwarding to Durable Objects and Containers. Developers can run full-duplex gRPC applications or leverage a...
blog.cloudflare.com
I think it's worth sharing the progress of my lottie compiler here: github.com/cometkim/ulo... You can test it on the demo page, which now has a live output preview in the breakdown section.
github.com/cometkim/rky... allows Rust's rkyv from/to JS applications. You can (zero-copy) deserialize wire messages sent from JS in Rust, or vice versa! Would be useful for JS-Rust interop projects, e.g., a Rust CLI with Cloudflare Workers, a web app with a Rust backend, etc.
GitHub - cometkim/rkyv-js: An unofficial library to use rkyv (Zero-copy deserialization framework for Rust) in JavaScript/TypeScript projects.
An unofficial library to use rkyv (Zero-copy deserialization framework for Rust) in JavaScript/TypeScript projects. - cometkim/rkyv-js
github.com
github.com/cometkim/uni... unicode-segmenter `countGrapheme` speedup by avoiding unnecessary allocation and iterator overhead. If you are using `Intl.Segmenter` simply to count numbers, you could consider this. It is almost 15-30x faster (varying depending on the input corpus).
Release unicode-segmenter@0.17.1 · cometkim/unicode-segmenter
Patch Changes e94d203: Add collectGraphemes(input) API that collects grapheme clusters into an array directly. This is a fast version of [...splitGraphemes(input)], which is acually the most used...
github.com
After much effort, it seems I have approached the lower threshold of the library's bundle size. When I make the code smaller, its compressed size actually becomes larger.
📣 The moment is here. 📣 TypeScript 7 is officially released! 7️⃣ devblogs.microsoft.com/typescript/a...
Announcing TypeScript 7.0 - TypeScript
Today we are proud to announce the availability of TypeScript 7, a 10x faster native port of TypeScript! Since its early days, TypeScript has promised to
devblogs.microsoft.com
OMG, @jddalton.bsky.social has a wild proposal for Rspack's native binding: - size: 38.4 MiB -> 13.8 MiB (-64%) - first load: 853ms -> 615ms (-28%)
Cloudflare Research is building a global consensus service called Meerkat that uses a new consensus algorithm called QuePaxa. We plan to use Meerkat to build a strongly consistent, fault-tolerant key-value store, and other applications. https://cfl.re/3SKpK7L
Introducing Meerkat: an experiment in global consensus
Meerkat is an experimental consensus service that is still in development. It’s being designed initially to manage small pieces of control plane state (e.g., leadership for replicated databases) and so it will be kept internal-only for the immediate future.
blog.cloudflare.com
unicode-segmenter/grapheme is now only 2.5 KiB mingzipped. Faster than ever. github.com/cometkim/uni... Last dance with Claude Fable 5
perf: rewrite grapheme segmenter with flat tables and pair-rule dispatch by cometkim · Pull Request #133 · cometkim/unicode-segmenter
Summary Rewrites unicode-segmenter/grapheme for the three axes that matter for a core dependency — bundle size, runtime speed, and memory footprint — and, as a byproduct of making the rule state ma...
github.com
uhh… TIL: <marquee direction="down" behavior="alternate"> <marquee behavior="alternate">This text will bounce</marquee> </marquee> developer.mozilla.org/en-US/docs/W...
TBH, I don't want to switch the compiler stack to Rust. The OCaml development experience is quite good, and it works particularly well with LLMs.
New demo: Animated CSS Grid Layout. codepen.io/bramus/pen/o... Here’s the thing: No View Transitions. No JS at all. Instead, it uses Anchor Positioning to anchor the cell contents to the cell. Then, CSS transitions are used to animate the contents to their new location as the grid re-layouts.
These might be the biggest changes to HTML in decades. Declarative Partial Updates let you render out-of-order HTML and build UI placeholders with zero JS. Combine it with the new streaming APIs to fetch and inject HTML directly into the DOM, simplifying Island architecture → goo.gle/49Bz9nK
Rust 1.96.0 has been released! 🌈 🦀✨ This release includes assert_matches!(), new range types in core::range::*, and fixes for a medium and a low severity vulnerability in Cargo (that didn't affect crates.io users). Check out the blog post for details: blog.rust-lang.org/2026/05/28/R...
Announcing Rust 1.96.0 | Rust Blog
Empowering everyone to build reliable and efficient software.
blog.rust-lang.org
Congrats and thank you to all who participated in the OpenTelemetry project! opentelemetry.io/blog/2026/ot...
OpenTelemetry is a CNCF Graduated Project
Today, the Cloud Native Computing Foundation (CNCF) announced that OpenTelemetry has graduated. Graduation is an important milestone for the project and reflects the strength of the OpenTelemetry comm...
opentelemetry.io
ECMAScript Excitement 🎉 This week, at its 114th meeting, TC39 advanced these proposals: 4️⃣ Atomics.pause 4️⃣ Joint iteration 3️⃣ Error stack accessor 3️⃣ Intl: Keep Trailing Zeros 3️⃣ Iterator Chunking 3️⃣ Iterator Includes 3️⃣ Iterator Join 3️⃣ RegExp Buffer Boundaries 2️⃣ Amount 2️⃣ Intl Sequence Units and... 👇
Today I wrote: Facade, a library for serialization in OCaml https://git.quiltro.org/lobo/facade
facade
a library for serialization in OCaml
git.quiltro.org
Tonic is joining the gRPC project. It's been a long road to get here but more information in the blog luciofranco.com/blog/tonic-j...
Tonic is joining the gRPC project | Lucio Franco
Don't panic
luciofranco.com
With the HTML-in-Canvas API announced at #GoogleIO, add DOM elements directly to your 3D environment, inheriting native support for screen readers, translation, and even autofill → goo.gle/3RQ8v49
ECMAScript excitement 😉 Congrats to @michael.ficarra.me on advancing Joint Iteration to Stage 4 at @tc39.es today 🎉 It provides synchronized iteration over multiple iterators. 🔸 Iterator.zip vends an array per-iteration 🔸 Iterator.zipToObjects vends an object per-iteration
GitHub - tc39/proposal-joint-iteration: a TC39 proposal to synchronise the advancement of multiple iterators
a TC39 proposal to synchronise the advancement of multiple iterators - tc39/proposal-joint-iteration
github.com
ECMAScript excitement 😉 Congrats to Keith Miller on advancing Atomics.pause to Stage 4 at @tc39.es today 🎉 Atomics.pause(IterationNumber) permits short finite-time spin locks on the main thread whilst remaining CPU-efficient 👍 github.com/tc39/proposa...
GitHub - tc39/proposal-atomics-microwait: Micro waits in JS
Micro waits in JS. Contribute to tc39/proposal-atomics-microwait development by creating an account on GitHub.
github.com
ECMAScript excitement 😉 Congrats to @chronicles.org on meeting the conditions for Explicit Resource Management to be Stage 4 at @tc39.es today 🎉 It introduces `using` declarations and the Symbol.dispose protocol to deterministically and ergonomically release resources 👍 github.com/tc39/proposa...
GitHub - tc39/proposal-explicit-resource-management: ECMAScript Explicit Resource Management
ECMAScript Explicit Resource Management. Contribute to tc39/proposal-explicit-resource-management development by creating an account on GitHub.
github.com
Firefox 151 is out now, and brings with it some tasty new web platform features: 🎉 Container style() queries 🎉 Web Serial API 🎉 Document Picture-in-Picture API 🎉 keyboardLock on requestFullscreen …and more! developer.mozilla.org/en-US/docs/M...
Firefox 151 release notes for developers (Stable) - Mozilla | MDN
This article provides information about the changes in Firefox 151 that affect developers. Firefox 151 was released on May 19, 2026.
developer.mozilla.org
Disaggregated IDE: As prompt-based coding agents become more popular, most other features of IDE rather than editing are also gradually being broken down into small purpose-built tool sets. It is self-fulfilling in that it can be built more effectively by coding agents.
