We Rewrote a Cron Library in Rust and Almost Missed the Deadline Doing It
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Ten hours, one 46 nanosecond bug, and a mild existential crisis about my degree. How it all started Some months ago I read about Anthropic rewriting Bun in Rust, and the part that stuck was not the speed. It was that they had to prove the new thing behaved like the old thing on a codebase nobody could afford to break. That is a much harder problem than writing fast code. So when a hackathon turned up whose whole premise was "take a library, rewrite it in another language, prove you did not…
1Key Takeaways
- Ten hours, one 46 nanosecond bug, and a mild existential crisis about my degree.
- How it all started Some months ago I read about Anthropic rewriting Bun in Rust, and the part that stuck was not the speed.
- It was that they had to prove the new thing behaved like the old thing on a codebase nobody could afford to break.
- That is a much harder problem than writing fast code.
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3Why it matters
Coding AI shifts how fast software ships and how much human review each change needs. DEV — AI reports that ten hours, one 46 nanosecond bug, and a mild existential crisis about my degree.
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