Bun
@bun.sh
Bun is a fast, all-in-one toolkit for installing, bundling, running and testing JavaScript & TypeScript.
To install Bun:
```
curl https://bun.sh/install | bash -s
```
https://bun.sh
To install Bun:
```
curl https://bun.sh/install | bash -s
```
https://bun.sh
In the next version of Bun & Safari
Polymorphic array access gets up to 8x faster, thanks to
@yusukesuzuki.bsky.social
Polymorphic array access gets up to 8x faster, thanks to
@yusukesuzuki.bsky.social
![mport { run, bench } from "mitata";
// Assuming the vectors are of the same length
function cosineDistance(a, b) {
let dotProduct = 0;
let magA = 0;
let magB = 0;
for (let i = 0; i < a.length; i++) {
dotProduct += a[i] * b[i];
magA += a[i] * a[i];
magB += b[i] * b[i];
}
return 1 - dotProduct / (Math.sqrt(magA) * Math.sqrt(magB));
}
// Generate random data for testing
const dimensions = 1536; // Adjust dimensions as needed
const array1 = Array.from({ length: dimensions }, () => Math.random() * 100);
const array2 = Array.from({ length: dimensions }, () => Math.random() * 100);
const floatArray1 = new Float32Array(array1);
const floatArray2 = new Float32Array(array2);
bench("Array", () => {
cosineDistance(array1, array2);
});
bench("Float32Array", () => {
cosineDistance(floatArray1, floatArray2);
});
await run();
bun-latest array.mjs # New
clk: ~3.94 GHz
cpu: Apple M3 Max
runtime: bun 1.2.9 (arm64-darwin)
benchmark avg (min … max)
-------------------------------------------
Array 1.07 µs/iter 1.07 µs ▇▃ ▄█▂
(1.06 µs … 1.13 µs) 1.09 µs ▄██▆███▇▅▄▄▄▂▂▂▁▁▁▁▂▂
Float32Array 1.64 µs/iter 1.64 µs █
(1.46 µs … 1.68 µs) 1.67 µs ▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁██▃▁
bun-1.2.8 array.mjs # Prev
clk: ~3.87 GHz
cpu: Apple M3 Max
runtime: bun 1.2.8 (arm64-darwin)
benchmark avg (min … max)
-------------------------------------------
Array 1.07 µs/iter 1.07 µs ▄ █▂
(1.06 µs … 1.11 µs) 1.10 µs ▅█▆▆██▄▄▅▂▁▁▁▂▂▁▁▁▁▁▁
Float32Array 13.52 µs/iter 13.50 µs █ █
(13.41 µs … 14.02 µs) 13.59 µs ██▁▁▁███▁██▁▁▁▁▁▁▁▁██
node array.mjs # Node, for comparison
clk: ~3.94 GHz
cpu: Apple M3 Max
runtime: node 23.10.0 (arm64-darwin)
benchmark avg (min … max)
-------------------------------------------
Array](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:76vf7xzncfaxw3m6qemqpmj4/bafkreia3vkwzkaofkvwt5tzghe3yqysdgn4dml276nfnn27i7f3rkad4wy@jpeg)
April 5, 2025 at 12:03 AM
In the next version of Bun & Safari
Polymorphic array access gets up to 8x faster, thanks to
@yusukesuzuki.bsky.social
Polymorphic array access gets up to 8x faster, thanks to
@yusukesuzuki.bsky.social
Bun v1.2.8
- Fixes 18 bugs (addressing 18 👍)
- napi perf improvement for integers
- 2x faster headers.get()
- node:http & node:fs bugfixes
- `bun install --frozen-lockfile` + `overrides` fix
- `bun pack` directory-specific ignores
Full release notes below
- Fixes 18 bugs (addressing 18 👍)
- napi perf improvement for integers
- 2x faster headers.get()
- node:http & node:fs bugfixes
- `bun install --frozen-lockfile` + `overrides` fix
- `bun pack` directory-specific ignores
Full release notes below
March 31, 2025 at 4:35 PM
Bun v1.2.8
- Fixes 18 bugs (addressing 18 👍)
- napi perf improvement for integers
- 2x faster headers.get()
- node:http & node:fs bugfixes
- `bun install --frozen-lockfile` + `overrides` fix
- `bun pack` directory-specific ignores
Full release notes below
- Fixes 18 bugs (addressing 18 👍)
- napi perf improvement for integers
- 2x faster headers.get()
- node:http & node:fs bugfixes
- `bun install --frozen-lockfile` + `overrides` fix
- `bun pack` directory-specific ignores
Full release notes below
Bun v1.2.7
- Fixes 35 bugs (addressing 219 👍)
- Builtin request.cookies.set & get in Bun.serve() routes
- Fixed TypeScript type definitions conflicts with `@types/node` & libdom
- Bugfixes for node:http, node:vm
Thanks to 13 contributors! Full release notes below
- Fixes 35 bugs (addressing 219 👍)
- Builtin request.cookies.set & get in Bun.serve() routes
- Fixed TypeScript type definitions conflicts with `@types/node` & libdom
- Bugfixes for node:http, node:vm
Thanks to 13 contributors! Full release notes below
March 27, 2025 at 10:47 AM
Bun v1.2.7
- Fixes 35 bugs (addressing 219 👍)
- Builtin request.cookies.set & get in Bun.serve() routes
- Fixed TypeScript type definitions conflicts with `@types/node` & libdom
- Bugfixes for node:http, node:vm
Thanks to 13 contributors! Full release notes below
- Fixes 35 bugs (addressing 219 👍)
- Builtin request.cookies.set & get in Bun.serve() routes
- Fixed TypeScript type definitions conflicts with `@types/node` & libdom
- Bugfixes for node:http, node:vm
Thanks to 13 contributors! Full release notes below
The above is a TailwindCSS + shadcn/ui Twitter frontend clone demo app. This is hot reloading css & js/ts/tsx, running a tailwindcss plugin, transpiling jsx/tsx, websocket hmr happening live as you type.
February 11, 2025 at 8:05 AM
The above is a TailwindCSS + shadcn/ui Twitter frontend clone demo app. This is hot reloading css & js/ts/tsx, running a tailwindcss plugin, transpiling jsx/tsx, websocket hmr happening live as you type.
The API is designed to work very similarly to Response, Blob, and Bun.file(path), so you can read from S3 just like from the local filesystem or fetch().
December 29, 2024 at 6:01 AM
The API is designed to work very similarly to Response, Blob, and Bun.file(path), so you can read from S3 just like from the local filesystem or fetch().
When you pass `new Response` an S3 file, it turns into a redirect to a presigned expiring URL so that you don't waste your server's resources downloading to S3 and sending to the user
December 29, 2024 at 6:01 AM
When you pass `new Response` an S3 file, it turns into a redirect to a presigned expiring URL so that you don't waste your server's resources downloading to S3 and sending to the user
Merge conflicts are inevitable, and that's why we put each package and it's dependencies on a single line.
Fewer lines means easier merge conflicts.
Fewer lines means easier merge conflicts.
December 11, 2024 at 4:27 PM
Merge conflicts are inevitable, and that's why we put each package and it's dependencies on a single line.
Fewer lines means easier merge conflicts.
Fewer lines means easier merge conflicts.
Unlike bun.lockb, this lockfile is human readable, which is important when working in teams
The lockfile format is jsonc, like tsconfig.json. Trailing commas and comments are allowed.
The lockfile format is jsonc, like tsconfig.json. Trailing commas and comments are allowed.
December 11, 2024 at 4:27 PM
Unlike bun.lockb, this lockfile is human readable, which is important when working in teams
The lockfile format is jsonc, like tsconfig.json. Trailing commas and comments are allowed.
The lockfile format is jsonc, like tsconfig.json. Trailing commas and comments are allowed.
![/tmp/nexty
❯ rm -rf bun.lockb
/tmp/nexty
❯ bun install --save-text-lockfile # text-based lockfile
bun install v1.1.39 (b55ca429)
Checked 35 installs across 60 packages (no changes) [9.00ms]
/tmp/nexty
❯ cat bun.lock -l json --no-paging
───────┬─────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
│ File: bun.lock
───────┼─────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
1 │ {
2 │ "lockfileVersion": 0,
3 │ "workspaces": {
4 │ "": {
5 │ "dependencies": {
6 │ "next": "^15.1.0"
7 │ },
8 │ "devDependencies": {
9 │ "@types/bun": "latest"
10 │ }
11 │ }
12 │](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:76vf7xzncfaxw3m6qemqpmj4/bafkreiabtafsh6bfrpdt7q3tlenfwczrsfx3wu5mqmd2hdn3c3dacgo3le@jpeg)
