Bun
@bun.sh
3.6K followers 1 following 52 posts
Bun is a fast, all-in-one toolkit for installing, bundling, running and testing JavaScript & TypeScript. To install Bun: ``` curl bun.sh/install | bash -s ``` bun.sh
Bun is a fast, all-in-one toolkit for installing, bundling, running and testing JavaScript & TypeScript. To install Bun: ``` curl bun.sh/install | bash -s ``` bun.sh
![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)
![❯ hyperfine "bun bun-onBeforeParse.js # New" "bun bun-onLoad.js" "bun rolldown-plugin.js" "bun esbuild-onLoad.js" "node rolldown-plugin.js" "node esbuild-onLoad.js" --warmup=100
Benchmark 1: bun bun-onBeforeParse.js # New
Time (mean ± σ): 13.2 ms ± 0.4 ms [User: 11.7 ms, System: 6.5 ms]
Range (min … max): 12.5 ms … 15.5 ms 178 runs
Benchmark 2: bun bun-onLoad.js
Time (mean ± σ): 18.0 ms ± 0.4 ms [User: 18.2 ms, System: 8.6 ms]
Range (min … max): 17.2 ms … 20.4 ms 137 runs
Benchmark 3: bun rolldown-plugin.js
Time (mean ± σ): 33.5 ms ± 0.4 ms [User: 39.2 ms, System: 32.3 ms]
Range (min … max): 32.6 ms … 35.3 ms 79 runs
Benchmark 4: bun esbuild-onLoad.js
Time (mean ± σ): 36.1 ms ± 0.6 ms [User: 28.1 ms, System: 7.3 ms]
Range (min … max): 34.8 ms … 37.8 ms 75 runs
Benchmark 5: node rolldown-plugin.js
Time (mean ± σ): 55.3 ms ± 0.7 ms [User: 57.0 ms, System: 30.9 ms]
Range (min … max):](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:72oizpbcvcvtty3fcsbudglr/bafkreigfrvqg7jmlocdbd4rstnfcngogw4tb6sv4wxaf2m7krksr6a7cvu)
![/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)
