it-parallel
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Takes an (async) iterable that emits promise-returning functions, invokes them in parallel up to the concurrency limit and emits the results as they become available, optionally in the same order as the input
Table of contents
Install
$ npm i it-parallel
Browser <script>
tag
Loading this module through a script tag will make it's exports available as ItParallel
in the global namespace.
<script src="https://unpkg.com/it-parallel/dist/index.min.js"></script>
Usage
import parallel from 'it-parallel'
import all from 'it-all'
import delay from 'delay'
const input = [
async () => {
console.info('start 1')
await delay(500)
console.info('end 1')
return 1
},
async () => {
console.info('start 2')
await delay(200)
console.info('end 2')
return 2
},
async () => {
console.info('start 3')
await delay(100)
console.info('end 3')
return 3
}
]
const result = await all(parallel(input, {
concurrency: 2
}))
console.info(result)
If order is important, pass ordered: true
as an option:
const result = await all(parallel(input, {
concurrency: 2,
ordered: true
}))
console.info(result)
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.