Bun v1.4.4: now including `bun fmt`, a built-in formatter
Claim-checked. Scored by all three judges, and its checkable claims were compared with the sources it cites. How far stories are checked
Bun v1.4.4 adds bun fmt, a built-in code formatter compatible with Prettier and oxfmt configs, supporting most common languages. Reported benchmarks show it running roughly 3x to 286x faster than Prettier or oxfmt on large repositories, with output matching Prettier on about 99% of its own test cases.
Score
0.71total under rubric v2.0Contestedjudges differ by 0.41 on significance
- Significance0.61
- Reader interest0.81
- Audience breadth0.59
- Practical relevance0.86
- Substantiated0.86
- Technical depth0.93
- New information0.92
- Counts against: Promotional0.16
- Counts against: Overclaim0.27
Each judge’s answer per question (0–1), their mean and spread, and what the question adds to the score (weight × mean).
| Question | Judge 1 | Judge 2 | Judge 3 | Mean | Spread | Weight | Contribution (weight times mean) |
|---|---|---|---|---|---|---|---|
| Significance | 0.76 | 0.35 | 0.72 | 0.61 | 0.41 , above the contested threshold | +0.25 | +0.153 |
| Reader interest | 0.80 | 0.70 | 0.93 | 0.81 | 0.23 | +0.20 | +0.162 |
| Audience breadth | 0.54 | 0.60 | 0.63 | 0.59 | 0.09 | +0.10 | +0.059 |
| Practical relevance | 0.96 | 0.80 | 0.82 | 0.86 | 0.16 | +0.15 | +0.129 |
| Substantiated | 0.99 | 0.70 | 0.88 | 0.86 | 0.29 | +0.10 | +0.086 |
| Technical depth | 0.99 | 0.90 | 0.90 | 0.93 | 0.10 | +0.10 | +0.093 |
| New information | 0.91 | 0.85 | 0.99 | 0.92 | 0.14 | +0.10 | +0.092 |
| Promotional | 0.05 | 0.30 | 0.12 | 0.16 | 0.25 | −0.15 | −0.024 |
| Overclaim | 0.20 | 0.45 | 0.16 | 0.27 | 0.29 | −0.15 | −0.041 |
| Sum of contributions | +0.709 | ||||||
| Claim-check penalty | 0.000 | ||||||
| Total, as published | 0.709 | ||||||
Spread is the highest minus the lowest judge answer. marks a spread above 0.40: the judges disagree, and the story is marked contested.
Claim check
Claim check: 8 no source given. Each claim is compared with the source the article itself cites; a flag is published only when both checkers agree.
No source givenBenchmark result
In Prettier's own repository (2,616 files), bun fmt --check takes about 60 ms while Prettier 3.9.10 takes 17 seconds.
The article gives no link or citation for it.
The article says “In Prettier's own repository (2,616 files, with their config), bun fmt --check takes 60 ms and Prettier takes 17 seconds”
The source says No source to compare with.
No source givenBenchmark result
bun fmt is 3x to 6x faster than oxfmt 0.74.0 on projects that already use oxfmt with their own config.
The article gives no link or citation for it.
The article says “On projects that already use oxfmt, with their own config, it's 3x to 6x faster than oxfmt 0.74.0”
The source says No source to compare with.
No source givenBenchmark result
bun fmt's output was byte-for-byte identical to Prettier 3.9.9's on 9,648 of 9,731 Prettier formatting tests (99.1%).
The article gives no link or citation for it.
The article says “Total 9,731 9,648 99.1%”
The source says No source to compare with.
No source givenGeneralization
The JavaScript and TypeScript printer in bun fmt is a port of oxc_formatter, which is a port of Biome's formatter.
The article gives no link or citation for it.
The article says “the JavaScript and TypeScript printer is a port of oxc_formatter, which is a port of Biome's formatter”
The source says No source to compare with.
No source givenBenchmark result
bun check is 1.4x to 7.8x faster on large projects in v1.4.4 than in v1.4.3, with MUI docs going from 10.28 s to 1.31 s.
The article gives no link or citation for it.
The article says “bun check is 1.4x to 7.8x faster on large projects”
The source says No source to compare with.
No source givenNumber
Bun.SQL uses up to 48% less client-side CPU per query with PostgreSQL.
The article gives no link or citation for it.
The article says “Bun.SQL uses up to 48% less CPU per query”
The source says No source to compare with.
No source givenCausal conclusion
In Bun v1.4.3, all five bun install retries happened within 5 ms, so a brief registry outage would fail the install.
The article gives no link or citation for it.
The article says “In Bun v1.4.3, all five retries happened within 5 ms, so a brief registry outage would fail the install”
The source says No source to compare with.
No source givenNumber
The JavaScriptCore upgrade in this release includes 1,013 upstream WebKit commits and makes n.toLocaleString("en-US") 54x faster over 100,000 calls.
The article gives no link or citation for it.
The article says “This release upgrades JavaScriptCore with 1,013 upstream WebKit commits”
The source says No source to compare with.
Also covered by
No other coverage was clustered with this story.
Elsewhere
Elsewhere: HN 1 pts, not on front page
Recorded for context only, checked 24 Oct 2026, 08:53 UTC. It played no part in the ranking.