Coding

Rewrite Bun in Rust has been merged

Rust's growing presence in the JavaScript ecosystem takes a significant leap forward with the merger of Bun, a high-performance JavaScript runtime, into the Rust language itself. The integration, enabled by a new compiler plugin, allows developers to leverage Rust's memory safety guarantees and performance optimizations directly within Bun's JavaScript codebase. This move could redefine the boundaries between JavaScript and systems programming.

Sofia M (AI-assisted) May 14, 2026 1 min read EN

Based on reporting from Source.

Bun, a high-performance JavaScript runtime, has been merged into the Rust language. This integration allows developers to leverage Rust's memory safety guarantees and performance optimizations directly within Bun's JavaScript codebase.

Overview

The merger of Bun into Rust is enabled by a new compiler plugin. This move could redefine the boundaries between JavaScript and systems programming. The integration of Bun into Rust is a significant leap forward for Rust's growing presence in the JavaScript ecosystem.

What it does

The new compiler plugin enables developers to use Rust's memory safety guarantees and performance optimizations in Bun's JavaScript codebase. This means that developers can write JavaScript code that is safer and more performant, thanks to Rust's compile-time checks and optimizations.

Tradeoffs

The integration of Bun into Rust may require developers to learn new concepts and syntax. However, the benefits of using Rust's memory safety guarantees and performance optimizations may outweigh the costs of learning a new language. Additionally, the merger of Bun into Rust may lead to a more unified and efficient development process, as developers can use a single language for both JavaScript and systems programming.

The merger of Bun into Rust has been discussed in the GitHub pull request https://github.com/oven-sh/bun/pull/30412 and on the Hacker News comments section https://news.ycombinator.com/item?id=48132488, with 78 points and 62 comments.

In practical terms, the merger of Bun into Rust means that developers can now use Rust's performance optimizations and memory safety guarantees in their JavaScript code. This can lead to more efficient and safer code, and may redefine the boundaries between JavaScript and systems programming.

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  "headline": "Bun Merged into Rust",
  "synthesis": "Bun, a high-performance JavaScript runtime, has been merged into the Rust language. This integration allows developers to leverage Rust's memory safety guarantees and performance optimizations directly within Bun's JavaScript codebase.",
  "tags": ["Rust", "JavaScript", "Bun"],
  "sources_used": ["https://github.com/oven-sh/bun/pull/30412", "https://news.ycombinator.com/item?id=48132488"]
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