Steno

Specialized fast async file writer

Steno makes writing to the same file often/concurrently fast and safe.

Used in lowdb.

https://en.wikipedia.org/wiki/Stenotype

Features

• Fast (see benchmark)
• Lightweight (~6kb)
• Promise-based
• Atomic write
• No race condition
• TypeScript definitions

Usage

import { Writer } from 'steno'

// Create a singleton writer
const file = new Writer('file.txt')

// Use it in the rest of your code
async function save() {
  await file.write('some data')
}

Benchmark

npm run benchmark (see src/benchmark.ts)

Write 1KB data to the same file x 1000

  fs     : 62.303ms
  steno  : 1.384ms

  fs.txt = steno.txt ✓


Write 1MB data to the same file x 1000

  fs     : 2.300s
  steno  : 5.444ms

  fs.txt = steno.txt ✓

License

MIT - Typicode