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PR-URL: https://github.com/nodejs/node/pull/35474 Reviewed-By: Ruy Adorno <ruyadorno@github.com> Reviewed-By: Ujjwal Sharma <ryzokuken@disroot.org> Reviewed-By: Ben Coe <bencoe@gmail.com> Reviewed-By: Geoffrey Booth <webmaster@geoffreybooth.com> Reviewed-By: Rich Trott <rtrott@gmail.com> Reviewed-By: Shelley Vohr <codebytere@gmail.com> Reviewed-By: Guy Bedford <guybedford@gmail.com> Reviewed-By: Matteo Collina <matteo.collina@gmail.com> |
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| index.js | ||
| LICENSE | ||
| package.json | ||
| README.md | ||
promise-call-limit
Call an array of promise-returning functions, restricting concurrency to a specified limit.
USAGE
const promiseCallLimit = require('promise-call-limit')
const things = getLongListOfThingsToFrobulate()
// frobulate no more than 4 things in parallel
promiseCallLimit(things.map(thing => () => frobulateThing(thing)), 4)
.then(results => console.log('frobulated 4 at a time', results))
API
promiseCallLimit(queue Array<() => Promise>, limit = defaultLimit)
The default limit is the number of CPUs on the system - 1, or 1.
The reason for subtracting one is that presumably the main thread is taking up a CPU as well, so let's not be greedy.
Note that the array should be a list of Promise-returning functions, not
Promises themselves. If you have a bunch of Promises already, you're best
off just calling Promise.all().
The functions in the queue are called without any arguments.