Bun v1.3.9

February 8, 2026 at 17:39

Quality: 8/10 Relevance: 9/10

Summary

Bun v1.3.9 release notes highlight parallel/sequential script execution, improved mocks with Symbol.dispose, and proxy handling improvements, plus CPU profiling flag and ESM bytecode support. The update also delivers performance boosts for Markdown rendering and the JS engine, plus various bug fixes and TypeScript improvements.

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