Rewriting Bun in Rust didn't just chase speed. It exposed 7 hidden bugs that use

Rewriting Bun in Rust didn't just chase speed. It exposed 7 hidden bugs that used to pass in silence.

Bun is a tool people use to run and build web apps. If you mostly live in AI chat apps and you're trying not to fall behind, the easy mistake is thinking this is just "new language = faster."

Rust is the stricter language they're moving to, and lowkey the real story is way more useful. In one public update tagged 9d0e93d, the team surfaced 7 memory mistakes and wrapped that area in 145 extra checks.

That's why I care. A tech update is worth your time only if it changes your next decision, not just your feed. Rust didn't magically fix everything; it made the loose floorboards visible so people could finally mark them and stop stepping there.

🔧 Before the cleanup, there were 19 tiny output differences across 62 side-by-side checks. After 25 tests were added, that weirdness got pinned down instead of hand-waved away.

Boundary: I am reading the public updates around the rewrite, not running a race on my own machine. So your setup may look different. Save this, or send it to the friend who thinks every rewrite is just about speed: do you care more about "faster," or about which hidden mess finally became visible? 👀

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