Jimmy Lai

@feedthejim

codex/chatgpt web infra EM @openai previously: eng director @nextjs @vercel, also @reactnative @meta

San Francisco

jimmyl.ai

Joined August 2018

535 Following

9,238 Followers

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Jimmy Lai
@feedthejim
Nov 9
btw, am now leading ChatGPT/Codex Web + Desktop infra group if you’ve already made other developers meaningfully faster (platform, tooling, reliability, DX), the opportunity is to do the same work at AGI scale hit me up if interested
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Jimmy Lai
@feedthejim
Oct 31
this is why frameworks aren't dead :) there's still so much to do in order to scale to infinity
Zack Jackson
@ScriptedAlchemy
Oct 31
I’ve thrown a modified t3code and pretty much every frontier model working in tandem over multiple subaccounts on a relatively “low-hanging fruit” for rspack— a portable cache that’s worktree-aware. While this doesn’t solve the memory challenges exceptionally, it does have a
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Jiahan Chen
@jiahan_c
Oct 31
最近深入支持了一些顶流 Agentic Web 工程，也是顺利都迁移到了 Rsbuild 2.x： - Chatgpt (Rsbuild + React Router) - Copilot (Rsbuild+ Tanstack Start) - 豆包 (Rsbuild + Modern.js) 一些小发现： - 前端没全死，复杂业务仍有挑战 - 在八位数代码量的大仓里，现有工具都不够快 - 多 agent
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Jimmy Lai
@feedthejim
Oct 20
I'm looking at migrating over for the ChatGPT codebase and saw ~70% improvements on both wall time perf + peak cpu/memory usage. this is great for getting work done faster but also much better if you want to run concurrent agents/worktrees at scale
VoidZero
@voidzerodev
Oct 20
Introducing tsrs: a Rust port of the TypeScript compiler 🦀 We are not forking TypeScript! ◆ In close collaborating with the TypeScript team ◆ Up to 8x faster than TS 7.0 & ~70% less memory ◆ Runs in WASM, so it works in your browser & on Workers ◆ Soon part of the Oxc
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Jimmy Lai
@feedthejim
Oct 7
it wouldn't be far-fetched to say that for OSS js maintainers, a fully functional and cost-efficient slop fork of Typescript is the equivalent of Navier-Stokes being solved for mathematicians a year ago, this idea would have been laughed at where do we go from here?
Theo - t3.gg
@theo
Oct 7
Announcing tsc-rs (aka ts-rust), my complete rewrite of the Typescript compiler, type checker, and LSP, all in Rust. This is a project I've had agents working on for 5 months now. I burned ~$400k of Codex tokens and got nowhere. Burned ~$20k of Opus and got there in 2 weeks. I
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Jimmy Lai
@feedthejim
Oct 5
sad that people learning how to build software today will never experience the enraging - but satisfying -experience of spending your week-end on a bug that was caused by a dumb typo
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Jimmy Lai

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