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A comment on Claude Code uses Bun written in Rust now. Parent comment

Re:Claude Code uses Bun written in Rust now by abc42 on Sunday July 19, 2026 @06:09PM (#48972102)
>If rewrites are so easy, why not rewrite CC in a native language? Would’ve been a hell of a lot cheaper.

Yeah, good question. OpenAI decided to rewrite Codex in Rust about a year ago[0].

In fact, since rewrites are that easy, what do we need Bun for? Why doesn't everybody just port all of their Javascript code into Rust?

[0] https://github.com/openai/codex/discussions/1174

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Re:Claude Code uses Bun written in Rust now by frollogaston on Sunday July 19, 2026 @07:02PM (#48972486)
Code verbosity and complexity still matter with LLM coding
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Re:Claude Code uses Bun written in Rust now by abc42 on Monday July 20, 2026 @06:30AM (#48976850)
Yeah, they do, but probably not in quite the same way as it matters to humans.
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