alt Hacker NewsBun's experimental Rust rewrite hits 99.8% test compatibility on Linux x64 glibc
https://xunroll.com/thread/2053047748191232310
Recent and related: Zig → Rust porting guide - https://news.ycombinator.com/item?id=48016880 - May 2026 (540 comments)
Comments
Curious how the test suite was applied. Was it ported from Zig to Rust beforehand?
3 years from now: Linux ported to Rust in 6 days.
And on the seventh day Claude ended His work which He had done, and He rested on the seventh day from all His work which He had done
The fastest large-scale rewrite in the history of software engineering, likely
Merge with Deno
This is a good reminder that tooling choices compound over time. The short-term speedup matters less than whether the next maintainer can still reason about the system.
Do scala.js next
Kinda crazy to use AI to switch from zig to rust in a tool that runs js. Bin bun and use a real lang to begin with. No reason to have that extra layer anymore.
Bunner
Being anthropic accuired project does he have access to mythos or it’s normal Claude we plebs have access to
Bun alert!
Explain it for dummies. Isn't Zig a programming language? Why are they re-writting a programming language in another programming language?
best way to kill an open source project in 2025 - use AI to port it to Rust.
jared's post is singlehandedly shitting on Zig's reputation. not good juju for him to post like that.
"I am so tired of worrying about & spending lots of time fixing memory leaks and crashes and stability issues"
bun was zig's poster child. if it moves away, it becomes yet another random language like nim or crystal.
[dead]
[dead]
[dead]
[flagged]
[dead]
[dead]
[dead]
[dead]
[dead]
Meh. I prefer Java, all hours of the day, every day of the week.
Ew
> why: I am so tired of worrying about & spending lots of time fixing memory leaks and crashes and stability issues. it would be so nice if the language provided more powerful tools for preventing these things.
As expected, Modula-2 / Objective Pascal like safety was great during the last century, before automatic resource management, and improved type system became common in this century.
Naturally also have to note, wasn't this supposed to be only an experiment, nothing serious?
An update on Bun’s experimental migration from Zig to Rust:
The Rust rewrite now passes 99.8% of Bun’s pre-existing Linux x64 glibc test suite.
The flagship product is both the cash cow (subsidizes rewrite) AND the labor (amortizes? rewrite).