July 9, 2026
Recode, Rehash, Repeat
My Thoughts on the Bun Rust Rewrite
Bun’s big language switch sparks a messy public fallout over ego, blame, and bad vibes
TLDR: Bun’s rewrite kicked off a much bigger argument after Andrew Kelley used the moment to criticize how the project was run and how its creator managed people. In the comments, some cheered the split as good for Zig, while others said the post felt less like analysis and more like a public personal takedown.
The official news is simple: Bun, a fast JavaScript tool, is moving from one programming language to another, and Andrew Kelley just published a very personal reaction. But the real spectacle is the crowd response, because readers instantly turned this from a software update into a full-on founder drama autopsy. Kelley praises Bun creator Jarred Sumner for helping Zig in the past, but he also paints a brutal picture of bad management, chaotic coding habits, and startup pressure gone wild. That set the comments section on fire.
Some readers were relieved, even celebratory. One person admitted they’d feared the rewrite would damage Zig’s reputation, then said they were glad to be wrong. Others read the post very differently: not as thoughtful analysis, but as a not-so-subtle public dragging. Multiple commenters basically said, “Come on, this says it’s not personal, but it feels extremely personal.” That became the central fight: was Kelley giving needed context, or just airing old grievances with extra polish?
Then came the side-eye and disbelief. A commenter mocked the idea that Bun could have survived on crowdfunding alone with a simple, devastating: “Is Bun really used that much?” Meanwhile, another user neatly summarized the awkward middle ground: Bun was treated like a poster child for Zig, while Zig insiders saw it more as a warning label. No huge meme wave here, but the vibe was pure internet courtroom: objection, speculation, character witness, and one very uncomfortable breakup energy.
Key Points
- •Andrew Kelley describes Jarred Sumner’s early involvement in the Zig community and says Bun gained attention as a JavaScript toolchain.
- •Kelley says Sumner publicly credited Zig for Bun’s performance and donated $60,000 annually to the Zig Software Foundation.
- •The article states that Bun’s transition into a venture-backed startup changed its operating context from community open source work to business execution.
- •Kelley says people he spoke with about Oven described management problems and that this discouraged many Zig developers from joining the company.
- •Kelley identifies Bun’s code quality as the main problem, saying the Zig team’s review of the codebase found practices they considered alarming.