My thoughts on the Bun Rust rewrite
andrewkelley.me
July 9, 2026
8 min read
🔥🔥🔥🔥🔥
70/100
Summary
Bun is being rewritten in Rust to improve performance and maintainability. Jarred's early involvement in the Zig community showcased his experimental approach to problem-solving, contributing to his growth as an engineer.
Key Takeaways
- Jarred, the founder of Bun, initially embraced a "beginner energy" approach, which led to rapid learning and experimentation but resulted in mediocre engineering outcomes.
- After securing venture capital, Jarred's focus shifted from community-driven development to running a business, which negatively impacted work-life balance and company culture at Oven.
- Poor management practices at Oven, including unrealistic expectations and low empathy, led to a talent exodus from the Zig community, as potential employees chose to avoid the company.
- The Zig team expressed concerns over Bun's code quality, citing reckless development practices and a lack of attention to technical debt and bug elimination.
Community Sentiment
Positives
- The switch to Rust from Zig could open up new possibilities for Bun, and many see this as a necessary evolution rather than a setback.
- Commenters appreciate the candidness of personal opinions in tech discussions, arguing that honesty is crucial for progress.
Concerns
- Zig's low test coverage and resistance to AI contributions are seen as glaring weaknesses that could hinder its growth and adoption.
- The tone of the article is criticized as unprofessional, with many feeling it undermines the seriousness required for a successful programming language.
