Process incoming async(iterable) functions in parallel
npm install it-parallel
> Process incoming async(iterable) functions in parallel
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
``javascript
import parallel from 'it-parallel'
import all from 'it-all'
import delay from 'delay'
// This can also be an iterator, async iterator, generator, etc
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
}))
// output:
// start 1
// start 2
// end 2
// start 3
// end 3
// end 1
console.info(result) // [2, 3, 1]
`
If order is important, pass ordered: true as an option:
`javascript
const result = await all(parallel(input, {
concurrency: 2,
ordered: true
}))
// output:
// start 1
// start 2
// end 2
// start 3
// end 3
// end 1
console.info(result) // [1, 2, 3]
`
`console`
$ npm i it-parallel
-
Licensed under either of
- Apache 2.0, (LICENSE-APACHE /
- MIT (LICENSE-MIT /
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.