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

Stream browser console. log to terminal
Memory
272 MB
OLD
150 мв
NEW
Hot reloads with lucide-react (307 reloads)
[browser)
Hello!
Node.js
Compatibility
98.4% of timers tests pass
node,js

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

Fucking hell, bun is so fast
1
It's out of this world fast
What kind of black magic is this haha
I got expo working with bun
Literally 10min of work lol

mport useStatic from "bun-use-static";
import app from "./my-express-app";
import mySinglePageApp from "./dashboard.html";

// Get the node:http Server from calling app.listen()
const server = app.listen(3000, () => {
console.log(`Example app listening on port 3000`);
});

useStatic(server, {
"/dashboard": mySinglePageApp,
});

$import { s3, file, write } from "bun"; const svg = s3("logo.svg", { accessKeyId: process.env.S3_ACCESS_KEY, secretAccessKey: process.env.S3_SECRET_KEY, endpoint: process.env.S3_ENDPOINT, bucket: process.env.S3_BUCKET, }); // Upload a local file to S3 await write(svg, file("./logo.svg")); // Download from S3 as text const text = await svg.text(); // or .json(), .bytes(), etc // Presign a URL const url = svg.presign(); console.log(url);$

$/tmp/nexty ❯ rm -rf bun.lockb /tmp/nexty ❯ bun install --save-text-lockfile # text-based lockfile bun install v1.1.39 (b55ca429) Checked 35 installs across 60 packages (no changes) [9.00ms] /tmp/nexty ❯ cat bun.lock -l json --no-paging ───────┬───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────── │ File: bun.lock ───────┼───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────── 1 │ { 2 │ "lockfileVersion": 0, 3 │ "workspaces": { 4 │ "": { 5 │ "dependencies": { 6 │ "next": "^15.1.0" 7 │ }, 8 │ "devDependencies": { 9 │ "@types/bun": "latest" 10 │ } 11 │ } 12 │$