---
title: Frontend & JS Digest — Week 24
date: Tue Jun 09 2026 16:00:00 GMT+0000 (Coordinated Universal Time)
---

My favorite from this week is about the optimization of the terminal load. I also run this and now terminal loads really fast.

## Links

### News

[[compiler] Port React Compiler to Rust](https://github.com/facebook/react/pull/36173) - Experimental WIP Rust port of React Compiler, shared early for feedback. No builds yet, fixtures pass, 417 commits, and the public shape is "Rust Babel AST plus scope info in, Rust Babel AST out." Big compiler-infrastructure energy.

### Article

[The Conductor Rewrite: What They Changed to Make It Fast](https://performance.dev/the-conductor-rewrite) - Follow-up performance teardown for Conductor's local-first Tauri app: SQLite source of truth, React profiling through a Chrome shim, TanStack Router for stable references, Virtuoso chat virtualization, idle agent shutdown, and moving checkpoints off the critical path.
[The Best Loading States Are No Loading States](https://jjenzz.com/best-loading-states-are-no-loading-states/) - Argument for pushing loading back to the app/router layer: preload route data, delay committing navigation until the next screen is ready, and treat late blank UI as a signal that data fetching escaped the preload path.
[Life is too short for a slow terminal](https://mijndertstuij.nl/posts/life-is-too-short-for-a-slow-terminal/) - Practical writeup on keeping terminal latency low: no shell framework, minimal plugins, cached completions, a fast prompt, and a GPU-accelerated terminal. The 30ms zsh startup target is aggressive in exactly the right way.

### Library&tools

[replacements.fyi](https://replacements.fyi/) - Tiny lookup tool for npm packages you may not need anymore. Type a dependency name and it points at lighter, safer, or platform-native replacements; very useful for dependency diets and those suspicious one-line packages.
[workerd](https://github.com/cloudflare/workerd) - Open-source JavaScript/Wasm runtime behind Cloudflare Workers. Useful for local Workers-style execution and runtime research; important caveat from the README is that it is not a hardened sandbox.
[thi.ng](https://thi.ng/) - Huge functional TypeScript ecosystem: 215 packages and around 185 examples covering transducers, reactive dataflow, geometry, WebGL, parsers, pixel work, shader DSLs, data structures, and more. Not a framework, more like a toolbox with strong taste.
[Lathe](https://github.com/devenjarvis/lathe) - Local app that uses LLMs to generate hands-on technical tutorials instead of doing the work for you. Nice inversion of the usual agent pitch: use the model to create the learning path, then still type the code yourself.
[oproxy](https://github.com/sauravrao637/oproxy) - Open-source HTTP, HTTPS, and SOCKS5 proxy for inspecting, replaying, modifying, and mocking traffic. Includes HAR export, generated cURL/Fetch/Python snippets, DNS overrides, throttling, Lua scripts, Docker support, and an authenticated assistant.
[sem](https://ataraxy-labs.github.io/sem/) - Semantic layer on top of Git: diff, blame, impact, log, entities, and AI context at function/class/method level instead of raw lines. The interesting part is giving agents structural changes rather than hoping they parse patches perfectly.