async-cache-dedupe

async-cache-dedupe

async-cache-dedupe is a cache for asynchronous fetching of resources with full deduplication, i.e. the same resource is only asked once at any given time.

Install

npm i async-cache-dedupe

Example

import { Cache } from 'async-cache-dedupe'

const cache = new Cache({
  ttl: 5 // seconds
})

cache.define('fetchSomething', async (k) => {
  console.log('query', k)
  // query 42
  // query 24

  return { k }
})

const p1 = cache.fetchSomething(42)
const p2 = cache.fetchSomething(24)
const p3 = cache.fetchSomething(42)

const res = await Promise.all([p1, p2, p3])

console.log(res)
// [
//   { k: 42 },
//   { k: 24 }
//   { k: 42 }
// ]

Commonjs/require is also supported.

License

MIT