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it-parallel-batch

v3.0.6

Published

Process (async)iterable values as functions with concurrency control

Downloads

188,453

Readme

it-parallel-batch

codecov CI

Process (async)iterable values as functions with concurrency control

About

Takes an async iterator that emits promise-returning functions, invokes them in parallel and emits the results in the same order as the input.

The final batch may be smaller than the batch size.

Example

import parallelBatch from 'it-parallel-batch'
import all from 'it-all'
import delay from 'delay'

// This can also be an iterator, async iterator, generator, etc
const input = [
  async () => {
    await delay(500)

    return 1
  },
  async () => {
    await delay(200)

    return 2
  },
  async () => {
    await delay(100)

    return 3
  }
]

const batchSize = 2

const result = await all(parallelBatch(input, batchSize))

console.info(result) // [1, 2, 3]

Install

$ npm i it-parallel-batch

Browser <script> tag

Loading this module through a script tag will make it's exports available as ItParallelBatch in the global namespace.

<script src="https://unpkg.com/it-parallel-batch/dist/index.min.js"></script>

API Docs

License

Licensed under either of

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.