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Your codex exec is wasting ~900 ms per turn. I measured where.

I spent a weekend rebuilding the JavaScript harness of OpenAI's Codex CLI on Bun. I expected a runtime story. I got an architecture story — and one config line you can use today without touching my fork. The 30-second version Codex is a Rust engine with a thin JavaScript layer on top: an npm launcher, a TypeScript SDK, and a…

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