WorkThe story, in brief
The Pulse: What can we learn from Bun’s rapid Rust rewrite with AI?
$165K in tokens. That's what it cost Bun to rewrite 11 days of work that would have taken a small team a year.
The KeyNews take
Why it matters
As AI-assisted development becomes production-ready, engineering leaders need to understand the economics and realistic timelines of LLM-driven rewrites—and the hiring risks that come with a flood of AI-generated code submissions.
The key facts
6 to knowBun completed Rust rewrite in 11 days with AI assistance
Equivalent manual effort estimated at 1 year for small team
Token cost: $165K for rewrite project
Coding LLM competitive intensity increasing
North Korean AI-assisted fake candidates remain hiring threat
Implications for engineering productivity and hiring practices
Go to the source
Pragmatic Engineernewsletter.pragmaticengineer.com
Publisher excerpt: A rewrite done in 11 days that would have taken a small team a year to complete, for $165K in tokens. Also: coding LLM “wars” heat up, AI fakers from North Korea still a problem when hiring, and more