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Run promise-returning & async functions concurrently with optional limited concurrency

Similar to Promise.all(), but accepts functions instead of promises directly so you can limit the concurrency.

If you're doing the same work in each function, use p-map instead.

See p-series for a serial counterpart.


$ npm install p-all


const pAll = require('p-all');
const got = require('got');

(async () => {
	const actions = [
		() => got(''),
		() => got(''),
		() => checkSomething(),
		() => doSomethingElse()

	console.log(await pAll(actions, {concurrency: 2}));


pAll(tasks, options?)

Returns a Promise that is fulfilled when all promises returned from calling the functions in tasks are fulfilled, or rejects if any of the promises reject. The fulfilled value is an Array of the fulfilled values in tasks order.


Type: Iterable<Function>

Iterable with promise-returning/async functions.


Type: object


Type: number
Default: Infinity
Minimum: 1

Number of concurrent pending promises.


Type: boolean
Default: true

When set to false, instead of stopping when a promise rejects, it will wait for all the promises to settle and then reject with an aggregated error containing all the errors from the rejected promises.


  • p-map - Map over promises concurrently
  • p-series - Run promise-returning & async functions in series
  • p-props - Like Promise.all() but for Map and Object
  • p-queue - Promise queue with concurrency control
  • p-limit - Run multiple promise-returning & async functions with limited concurrency
  • More…