[Jarred Sumner · Bun · bun.com](<https://bun.com/blog/bun-v1.3.9>)

# Bun v1.3.9

Fixes 23 issues (addressing 13 👍). Run multiple scripts in --parallel or --sequential. bun:test mock & spyOn get Symbol.dispose support. ESM bytecode compilation. Faster Bun.markdown. Faster RegExp, String.prototype.trim, String.prototype.startsWith.

1. [Releases · Bun](<https://curation.space/bun/releases>)