Bun Migrates from Zig to Rust: What My Real Benchmarks Say About Whether It Matters The right way to speed up a JavaScript runtime is to ignore the language it's written in. I know that sounds weird coming from someone who's been doing this for 32 years. Let me explain why the most-discussed announcement of the week on Hacker News — 489 points on one thread, 506 on another, about Bun migrating from Zig to Rust — raises more questions for me than it answers, and why I ran my own benchmarks before writing a single word of opinion. Spoiler: the numbers don't validate the hype or the doom. Bun Rust Migration Performance: The Context HN Doesn't Give You The announcement landed as "Bun is being ported from Zig to Rust" and split into two simultaneous threads that together nearly hit a thousand points. For anyone following the JS ecosystem, the news carries weight: Bun was built from scratch in Zig, and that choice was part of its identity.…