Bun v1.3.13 is compiling

In the next version of Bun Bun's glibc minimum version drops from 2.26 to glibc 2.17 (released 14 years ago) This unblocks companies running Red Hat Enterprise Linux 7 & Amazon Linux 1 from using Bun https://github.com/oven-sh/bun/pull/29461

Bun

In the next version of Claude Code The npm package uses Bun

In the next version of Bun `bun test --changed` recursively scans the module graph of all tests to only run test files that changed according to git. https://github.com/oven-sh/bun/pull/29262

In the next version of Bun `bun test --shard=1/10` splits which test files run, so you can horizontally scale test runners in Github Actions / CI. https://github.com/oven-sh/bun/pull/29366

In the next version of Bun `bun test --parallel` runs test files in parallel

In the next version of Bun `bun test` gets experimental support for per-file test isolation, and we made it fast.

In the next version of Bun We fixed the root causes behind 66% of automated Windows crash reports

In the next version of Bun Bun's JavaScript runtime uses 5% less memory

In the next version of Bun Bun's builtin `WebSocket` client supports unix domain sockets

In the next version of Bun AJAX is back `Bun.XML.parse(string)’ parses XML & you can import from XML files in JS. https://github.com/oven-sh/bun/pull/29154

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Bun v1.3.12 - Fixes 120 issues (addressing 219 👍) - `Bun.WebView` - headless browser automation - `bun ./file.md` pretty-prints Markdown - In-process `Bun.cron()` - Better async stack traces - Many Node.js compatibility & bug fixes Thx 8 contributors! https://bun.com/blog/bun-v1.3.12

Bun v1.3.12 is compiling

In the next version of Bun `bun ./hello.md` & `Bun.markdown.ansi(string)` pretty-prints markdown to terminal-friendly ansi text

Today is World Bun Day.

In the next version of Bun Bun gets native support for the stage-3 TC39 proposal "Slop Mode"

In the next version of Bun Bun goes ad-supported!

`bun install` blocks postinstall scripts by default. This helps protect from supply-chain attacks, like today’s axios incident.

QT: https://twitter.com/i/status/2037713766205608234

Thank you @momito!

should we do `b` - `b a.js` - `b i` - `b dev` poll below

but what about bun??

THE BUN TIMES

many people have asked about this

In the next version of Bun On Linux, embedded files in `bun build --compile` lazy load, reducing RSS and startup time

Bun v1.3.11 - Fixes 105 issues (addressing 307 👍) - 4 MB 🤏 on Linux x64 - Bun.cron for OS-scheduled functions - Bun.sliceAnsi is like .slice but ansi & grapheme-aware - Numerous security & bug fixes Thanks to 15 contributors! https://bun.com/blog/bun-v1.3.11

Bun v1.3.11 is compiling

In the next version of Bun Bun gets 4 MB smaller on Linux x64 because we deleted CMake

many people are bun-curious

Alysa Liu recently went viral for her Teen Vogue rant on migrating from `pnpm install` to `bun install` “Youre keeping pnpm-lock.yaml around as a safety net which is exactly the problem. Delete it, set linker = “isolated” in bunfig.toml explicitly — don’t rely on configVersion.”

What is my perfect crime? A developer types bun test. He meant bun run test. Do I throw an error? No. I run his tests. Built-in runner. They pass 10x faster. He thinks Vitest ran. It didn't. I ran. He types bun build. Same mistake. Same result. His bundle appears. He ships it. Months go by. (1/3)

Bun will only get harder to not use over time

Bun.cron will be in the next release

is this what a supply chain risk looks like to you??

am i a supply chain risk now???

Bun v1.3.10 - Fixes 155 issues (addressing 642 👍) - `bun repl` - native JS/TS repl - Windows ARM64 - ECMAScript decorators - Faster event loop - Barrel file import optimization - Faster structuredClone, Buffer.slice, path.parse Thanks 11 contributors! https://bun.com/blog/bun-v1.3.10

Bun v1.3.10 is compiling

This account can now be found on the fediverse at @bunjavascript.mbdio.uk@bsky.brid.gy

In the next version of Bun Bun for Windows ARM64!

Bun is joining Anthropic! https://bun.com/blog/bun-joins-anthropic

Bun v1.3.9 - Fixes 23 issues - Run multiple package.json scripts or files in parallel or sequential with `bun run --parallel 'server.ts' 'build:*'` - ESM bytecode in `bun build --compile` - Faster: RegExp, string.trim() & more Thanks to 11 contributors! https://bun.com/blog/bun-v1.3.9

In the next version of Bun & Safari `string.trim()` gets 10% - 42% faster, thanks to @__sosukesuzuki

In the next version of Bun & Safari `map.size` & `set.size` gets 2x faster, thanks to @__sosukesuzuki

In the next version of Bun & Safari `myString.startsWith(a)` gets 1.2x - 5x faster, thanks to @__sosukesuzuki

Here's what Bun shipped January 2026, across 3 releases & 144 issues fixed (addressing 374 👍). Thanks to 38 contributors!

Bun v1.3.9 is compiling

Bun v1.3.8 - `Bun.markdown` is a builtin Markdown parser with support for rendering HTML, React & strings - `bun build --metafile-md` reports the bundle's imports & exports as markdown - Fix for `npm install -g bun` regression on Windows https://bun.com/blog/bun-v1.3.8

Bun v1.3.8 is compiling