BUN'S RUST REWRITE REACHES 99.8% TEST COMPATIBILITY

DEV DESK■ 1 MIN READ

SAT, MAY 9, 2026

■ AI-SUMMARIZED FROM 1 SOURCE ▸ TIMELINE

Bun's experimental Rust rewrite has achieved 99.8% test compatibility on Linux x64 glibc systems. The milestone marks significant progress in the JavaScript runtime's ongoing port from Zig to Rust.

The Bun team announced that their Rust-based implementation now passes nearly all compatibility tests on Linux x64 with glibc. This follows the project's earlier transition away from Zig, driven by performance improvements and developer familiarity with Rust. The nearly complete test coverage on this primary target platform suggests the rewrite is nearing a functional parity with the original codebase. Support for additional platforms and architectures remains in progress. Bun aims to maintain its positioning as a fast, all-in-one JavaScript toolkit. The Rust rewrite represents a significant engineering effort to improve performance and maintainability while preserving compatibility with existing code. Full deployment timelines and additional platform support details remain unclear.

■ SOURCES

► Hacker News

■ SUMMARY WRITTEN BY AI FROM THE LINKS ABOVE

■ MORE FROM THE DEV DESK

P855HASHICORP CO-FOUNDER EXITS GITHUB OVER PLATFORM CONCERNS

HashiCorp co-founder Mitchell Hashimoto has moved his projects off GitHub, citing concerns that the platform no longer serves serious development work. The move reflects growing friction between open source maintainers and GitHub's direction.

9H AGO— Dev Desk

P853DEVELOPER REPORTS ACTUAL UUID V4 COLLISION

A developer reported an extremely rare event: a genuine UUID v4 collision in production. Two separate documents generated identical UUIDs roughly one year apart using the standard npm uuid package.

9H AGO— Industry Desk

P839TANGLED CALLS FOR FEDERATED CODE FORGE SYSTEM

Tangled proposes a federation model for code forges to reduce vendor lock-in and increase interoperability across development platforms. The proposal has generated significant discussion in the developer community.

11H AGO— Industry Desk

P829ZED CODE EDITOR REACHES 1.0 RELEASE

Zed, a high-performance code editor built in Rust, has reached version 1.0. The release marks the editor's transition from beta to a stable, production-ready version.

16H AGO— Industry Desk

◄ BACK TO NEWS

BUN'S RUST REWRITE REACHES 99.8% TEST COMPATIBILITY

■ MORE FROM THE DEV DESK

■ SUBSCRIBE TO THE DAILY BRIEF