May 14, 2026
Rust never sleeps, comments never chill
Rewrite Bun in Rust has been merged
Bun’s giant makeover is here, and the comments are already in full meltdown mode
TLDR: Bun has merged a huge rewrite meant to make the tool safer, smaller, and easier to maintain without changing how it basically works. The community reaction is a mix of awe, suspicion, and meme energy, with people arguing over trust, giant code changes, and one hilariously self-owning “ai slop” moment.
A major behind-the-scenes rewrite of Bun, a popular coding tool, has officially been merged, and the developers are selling it as a practical glow-up: smaller download size, fewer memory problems, less random test weirdness, and speeds that are anywhere from the same to a bit better. The team says the core design is still basically unchanged, just rewritten in Rust, a programming language famous for helping catch nasty bugs before they cause chaos. Translation: the app should feel familiar, but the people maintaining it may sleep a little better.
But the real fireworks are in the comments. One reaction simply said “wild” and somehow pulled absurd engagement numbers, which pretty much sums up the mood. Some people are impressed by the sheer audacity of a rewrite this huge. Others are stuck on the trust issue: one commenter accused the team of downplaying the project earlier with the spicy claim that “it’s just an experiment” was really a way to calm critics, then dropped a receipt. That turned a technical update into a mini drama about whether the community got the soft-launch treatment.
Then came the mega-commit discourse. A “+1,000,000” line change in one shot had people gawking in horror, while skeptics worried the project may have passed tests partly by changing the tests themselves. And the comedy prize? A follow-up where Bun’s own system allegedly tagged the removal of old source files as “ai slop” in its own pull request. So yes: serious engineering milestone, but also prime internet theater.
Key Points
- •A rewrite of Bun in Rust has been merged.
- •The Rust version passes Bun’s existing test suite on all platforms.
- •The update says the rewrite fixes several memory leaks and flaky tests.
- •The binary size is reported to be 3 MB to 8 MB smaller, with benchmarks ranging from neutral to faster.
- •The project still needs optimization and cleanup work before landing in a non-canary release.