My Thoughts on Bun's Rust Rewrite

Bun의 JavaScript 런타임이 Zig에서 Rust로 AI(Claude) 자동 생성 코드 기반으로 6,755 커밋, 6일 만에 전면 재작성되었다. Zig는 초기 빠른 프로토타이핑과 고성능 구현에 핵심 역할을 했으나, 수동 메모리 관리의 인지 비용이 빠른 개발 문화와 맞지 않아 Rust로 전환했다. 그러나 AI가 작성한 코드가 인간 리뷰 없이 바로 프로덕션에 투입된 점은 장기 유지보수와 예측 불가능한 버그 대응에 큰 위험 요소로 지적된다. 이 사례는 AI 자동 코드 생성의 실무 적용과 신뢰성 문제를 시사한다.

https://en.liujiacai.net/2026/05/16/bun-rust-port/

#bun #rust #zig #aicodegeneration #softwareengineering

Can someone please explain to me the point of the #bun rewrite? Doesn't rewriting it in #rust from #zig not just make it #deno? Actual question here.

#opensource #javascript

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Released as a single humongous monolithic pull request within a week since opening, the kind of ad-hoc, uncoordinated, trigger-happy, just-because-we-can attitude of the #Bun "LLM Rust rewrite" is so symbolic of the cultural shift many people & orgs are undergoing, where their focus has moved almost exclusively to quantity & speed-to-market (aka "higher productivity"), completely shoving aside long-term goals and considerations, incl. design principles/strategies, maintainability, safety, but also so many social aspects (e.g. organically grown community/staff, organizational skills/knowledge/understanding, much of it tacit, sometimes built up over decades), consideration of downstream effects, compatibility/composability, other costs (not just your own) etc.

All of these things, this loss of culture, seem to be treated as easily sacrificable third-class factors, or components which are simply assumed to be automatable (and therefore replaceable, unnecessary) in the new mindset. It's uncanny!

The engine can't/mustn't be slowed or halted, and it needs more fodder! Only with maximum speed can we accelerate it enough to jump over the coming chasm, straight into the singularity...

In these developments, I too see very strong parallels to a similar goldrush mindset which emerged during the NFT years and has changed digital/algorithmic/generative art for years to come, and which has similarly 180° reorientated the focus, work & value systems of many artists/peers...

(Update: minor edits for clarity...)

#OpenSource #Culture #AlgorithmicArt #GenerativeArt

OMG... already getting tired of the new rants this week: #Anthropic rewriting #Bun.

#AI has been all around us for more than 20 years and is not going away. Software rewrites have been happening behind scenes for even longer than that and again they are not going away.

If you don't like #LLMs, don't use them. If you don't like Bun, don't use it. If you don't like #Rust... guess what... don't use it!

Just get over it. Move on to your next rant.

Looks like the famous #Bun rewrite has landed :
+1 009 257 / -4 024 https://github.com/oven-sh/bun/pull/30412
+487 / -710 539 https://github.com/oven-sh/bun/pull/30683

aaaand, "It passes Bun's pre-existing test suite on all platforms (and fixes several memory leaks and flaky tests), the binary size shrinks by 3 MB - 8 MB, the benchmarks are between neutral and faster"
I hope we'll know how many GWh went into it 🍿

Lmao, that #bun thing is making GitHub so slow that I can’t even push

Save Cork’s mirror:
https://codeberg.org/buresdv/Cork

#programming #CorkApp #macdev #homebrew