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Bun

@bunjavascript
Bun is a fast, all-in-one toolkit for installing, bundling, running and testing JavaScript & TypeScript. To install: `npm i -g bun`
bun.com
Joined July 2022
7
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80.6K
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  • Pinned
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    Bun
    @bunjavascript
    Dec 2, 2025
    Bun is joining Anthropic!
    Image
    Bun is joining Anthropic
    From bun.com
  • user avatar
    Bun
    @bunjavascript
    23h
    In the next version of Bun Node.js compatibility gets a big upgrade. Since Bun v1.3.14, an additional +1,493 tests from the Node.js test suite pass in Bun.
    Line chart titled "Bun's Node.js test suite progress" — official Node.js test suite files passing on every commit. The line climbs from about 1,460 at Bun v1.2.0 (Jan 2025) to about 2,230 by v1.3.0 (Oct 2025), stays flat until May 2026, then shoots almost straight up to 3,743 on main today (Aug 2026), crossing a dashed line labeled "The bar to ship Bun v1.4: 3,693." Callouts read "+50 over the bar" and "+1,517 since v1.3.0."
    Image
    user avatar
    Bun
    @bunjavascript
    Aug 7
    In the last 16 days, an additional +473 new tests from Node.js' test suite pass in Bun v1.4
  • user avatar
    Bun
    @bunjavascript
    Aug 12
    In the next version of Bun RegExp gets up to 281x faster
    Dark benchmark card titled "RegExp in Bun". Top right, struck through: the GitHub issue title "Node.js is 300× faster than Bun at isbot regexp" (oven-sh/bun#5197, closed). Huge headline: "281× faster on the isbot regex." Subtext: "110 alternatives, four lookbehinds, 263,487 real user-agent strings. Same script, same machine." Three horizontal bars, drawn to scale, lower is better: Bun v1.3.14 (before) 32,395 ms — spans the full width; Node.js v26 (V8/Irregexp) 141 ms — a thin sliver; Bun v1.4 (after) 115 ms — an even thinner pink sliver. Footer: Apple Silicon, benchmark from github.com/quick-lint/bun-vs-node; improvements: JIT-compiled lookbehinds, alternation dispatch, prefix factoring, wider Boyer-Moore search. The isbot regex source is faintly visible as background texture.
  • user avatar
    Bun
    @bunjavascript
    Aug 10
    In the next version of Bun `Bun.YAML.parse` supports cyclic anchors & aliases
    In the next version of Bun
▎
▎ Bun.YAML.parse supports cyclic anchors & aliases
▎
▎ tweet: &tweet
▎   text: |
▎     In the next version of Bun
▎
▎     Bun.YAML.parse supports cyclic anchors & aliases
▎   quote_tweet: *tweet
▎ const { tweet } = Bun.YAML.parse(src)
▎ tweet.quote_tweet.quote_tweet.quote_tweet.text
▎ // "In the next version of Bun\n\nBun.YAML.parse supports cyclic anchors & aliases\n"
  • user avatar
    Bun
    @bunjavascript
    Aug 8
    In the next version of Bun `Bun.XML.parse` is a SIMD-accelerated XML parser builtin to Bun
    XML parsing
S3 ListObjects response, 231 KB. Lower is better.
19×
faster than fast-xml-parser
Bun.XML.parse
1.3 ms
txml
4.8 ms
fast-xml-parser
24.8 ms
@xmldom/xmldom
33.6 ms

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