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it-parallel
Advanced tools
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
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
$ npm install --save it-parallel
const parallel = require('it-parallel')
const all = require('it-all')
const delay = require('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:
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]
FAQs
Process incoming async(iterable) functions in parallel
The npm package it-parallel receives a total of 13,801 weekly downloads. As such, it-parallel popularity was classified as popular.
We found that it-parallel demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 1 open source maintainer collaborating on the project.
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