---
title: "Bun v1.3.1"
url: https://daily.dev/posts/bun-v1-3-1-6ud9r04nj
source_url: https://bun.com/blog/bun-v1.3.1
type: article
source: "Bun"
published: 2025-10-22T07:55:15.283Z
updated: 2025-10-22T07:55:43.172Z
tags: ["javascript", "testing", "nodejs", "bun"]
reading_time: 10
upvotes: 51
comments: 2
language: en
---

> ## Documentation Index
> Fetch the complete documentation index at: https://daily.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# Bun v1.3.1

**[Bun](https://daily.dev/sources/bun)** · 10 min read · 51 upvotes · 2 comments

## Summary

Bun v1.3.1 fixes 103 issues with significant performance and feature improvements. Key updates include 2× faster builds on macOS for symlink-heavy projects, source maps preserving legal comments, and CommonJS format now inlining import.meta. The test runner adds Vitest's global vi, --pass-with-no-tests and --only-failures flags. Package management improvements include .npmrc email authentication support, faster installs without peer dependencies, and selective hoisting via publicHoistPattern/hoistPattern for isolated installs. Node.js compatibility enhancements include FileHandle.readLines() in fs/promises. Numerous bundler, transpiler, WebSocket, MySQL, and Windows-specific bugs are resolved.

## Full article

daily.dev links to this article rather than hosting it. Read it at the original source: <https://bun.com/blog/bun-v1.3.1>

## Community discussion

Top comments from developers on daily.dev.

**@alexandr\_sedeke** · 2 upvotes

> I’m really impressed by how quickly Bun is developing. From the start, Jarred Sumner said his goal was to build something like a “Ruby on Rails for JavaScript,” and it’s exciting to see that vision taking shape. Features like native S3 integration show Bun growing beyond speed into a complete, elegant development platform. If the team keeps this pace, it could redefine how we build modern web apps.

**@kbbdy** · 1 upvotes

> I really like Bun approach to development: it adds new things to nodejs world, especially performance, but not forces me to refactor the whole sourcecode I have in existing project, to be able to run the app. In Deno, I was forced to change all imports in my codebase to include extension, and remove barrel imports, which are great feature to me. That's why I dropped deno in favor of Bun.

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---

Tags: [#javascript](https://daily.dev/tags/javascript), [#testing](https://daily.dev/tags/testing), [#nodejs](https://daily.dev/tags/nodejs), [#bun](https://daily.dev/tags/bun)

[View this post on daily.dev](https://daily.dev/posts/bun-v1-3-1-6ud9r04nj)