Rewriting everything in Rust was a meme of itself before the wide application of AI. However, Rewriting Bun in Rust is interesting precisely because of AI.

Quoting the article itself:

Pre-merge, this took 5.9 billion uncached input tokens, 690 million output tokens, and 72 billion cached input token reads — around $165,000 at API pricing. By hand, I think this would've taken 3 engineers with full context on the codebase about a year, during which time we wouldn't be able to improve Node.js compatibility, fix bugs, fix security issues or implement new features. We never would've done that. The realistic alternative was to do nothing and keep fixing the bugs at the top of this post forever.

What’s interesting in this article, regardless of whether or not you plan to rewrite a huge code base, is how he approached the task with multiple agents. This is something you could do in your daily job for smaller things as well.

Bun v1.4.0 is the first Rust version, and some companies already use it in production.

#ai #programming #rust