Open SourceAug 10, 2026, 1:09 PM

I counted every Bun bug before and after the Rust rewrite

Evolving story · 2 updatesBun’s Rust RewriteTimeline →
30-second summary

A developer analyzed bugs in Bun before and after its Rust rewrite, finding significant changes. The rewrite added over 1 million lines of code and changed 2,188 files.

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I counted every Bun bug before and after the Rust rewrite
Key takeaways
  • Bun's Rust rewrite added over 1 million lines of code
  • The rewrite changed 2,188 files
  • The analysis provides insight into the impact of the rewrite on the project's bug count and codebase
Full story

The Bun project recently underwent a significant rewrite in Rust, which has sparked interest in how this change affects the project's overall health.

A developer took it upon themselves to count every bug in Bun before and after this rewrite. The results show a substantial addition of code, with over 1 million lines added and nearly 2,200 files changed.

This analysis provides insight into the impact of such a major rewrite on a project's bug count and codebase. It highlights the efforts of the Bun team to improve the project's stability and performance.

The findings of this analysis can be useful for developers and project maintainers considering similar rewrites or looking to improve their own project's health.

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Why this matters
Developers

helps with understanding the impact of major rewrites on project health

Everyone

shows the efforts of the Bun team to improve project stability and performance

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