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<h1 align="center">Neo-Async</h1>
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<p align="center">
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<img src="https://raw.githubusercontent.com/wiki/suguru03/neo-async/images/neo_async_v2.png" width="250px" />
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</p>
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<p align="center">
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<a href="https://www.npmjs.com/package/neo-async"><img alt="npm" src="https://img.shields.io/npm/v/neo-async.svg"></a>
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<a href="https://travis-ci.org/suguru03/neo-async"><img alt="Travis Status" src="https://img.shields.io/travis/suguru03/neo-async.svg"></a>
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<a href="https://codecov.io/gh/suguru03/neo-async"><img alt="Coverage Status" src="https://img.shields.io/codecov/c/github/suguru03/neo-async/master.svg"></a>
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<a href="https://www.npmjs.com/package/neo-async"><img alt="download" src="https://img.shields.io/npm/dm/neo-async.svg"></a>
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<a href="https://lgtm.com/projects/g/suguru03/neo-async/context:javascript"><img src="https://img.shields.io/lgtm/grade/javascript/g/suguru03/neo-async.svg?logo=lgtm&logoWidth=18" alt="Code Quality: Javascript" height="18"></a>
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<a href="https://lgtm.com/projects/g/suguru03/neo-async/alerts"><img src="https://img.shields.io/lgtm/alerts/g/suguru03/neo-async.svg?logo=lgtm&logoWidth=18" alt="Total Alerts" height="18"></a>
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</p>
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Neo-Async is thought to be used as a drop-in replacement for [Async](https://github.com/caolan/async), it almost fully covers its functionality and runs [faster](#benchmark).
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Benchmark is [here](#benchmark)!
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Bluebird's benchmark is [here](https://github.com/suguru03/bluebird/tree/aigle/benchmark)!
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## Code Coverage
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![coverage](https://raw.githubusercontent.com/wiki/suguru03/neo-async/images/coverage.png)
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## Installation
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### In a browser
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```html
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<script src="async.min.js"></script>
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```
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### In an AMD loader
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```js
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require(['async'], function(async) {});
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```
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### Promise and async/await
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I recommend to use [`Aigle`](https://github.com/suguru03/aigle).
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It is optimized for Promise handling and has almost the same functionality as `neo-async`.
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### Node.js
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#### standard
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```bash
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$ npm install neo-async
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```
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```js
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var async = require('neo-async');
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```
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#### replacement
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```bash
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$ npm install neo-async
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$ ln -s ./node_modules/neo-async ./node_modules/async
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```
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```js
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var async = require('async');
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```
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### Bower
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```bash
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bower install neo-async
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```
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## Feature
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[JSDoc](http://suguru03.github.io/neo-async/doc/async.html)
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\* not in Async
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### Collections
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- [`each`](http://suguru03.github.io/neo-async/doc/async.each.html)
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- [`eachSeries`](http://suguru03.github.io/neo-async/doc/async.eachSeries.html)
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- [`eachLimit`](http://suguru03.github.io/neo-async/doc/async.eachLimit.html)
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- [`forEach`](http://suguru03.github.io/neo-async/doc/async.each.html) -> [`each`](http://suguru03.github.io/neo-async/doc/async.each.html)
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- [`forEachSeries`](http://suguru03.github.io/neo-async/doc/async.eachSeries.html) -> [`eachSeries`](http://suguru03.github.io/neo-async/doc/async.eachSeries.html)
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- [`forEachLimit`](http://suguru03.github.io/neo-async/doc/async.eachLimit.html) -> [`eachLimit`](http://suguru03.github.io/neo-async/doc/async.eachLimit.html)
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- [`eachOf`](http://suguru03.github.io/neo-async/doc/async.each.html) -> [`each`](http://suguru03.github.io/neo-async/doc/async.each.html)
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- [`eachOfSeries`](http://suguru03.github.io/neo-async/doc/async.eachSeries.html) -> [`eachSeries`](http://suguru03.github.io/neo-async/doc/async.eachSeries.html)
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- [`eachOfLimit`](http://suguru03.github.io/neo-async/doc/async.eachLimit.html) -> [`eachLimit`](http://suguru03.github.io/neo-async/doc/async.eachLimit.html)
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- [`forEachOf`](http://suguru03.github.io/neo-async/doc/async.each.html) -> [`each`](http://suguru03.github.io/neo-async/doc/async.each.html)
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- [`forEachOfSeries`](http://suguru03.github.io/neo-async/doc/async.eachSeries.html) -> [`eachSeries`](http://suguru03.github.io/neo-async/doc/async.eachSeries.html)
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- [`eachOfLimit`](http://suguru03.github.io/neo-async/doc/async.eachLimit.html) -> [`forEachLimit`](http://suguru03.github.io/neo-async/doc/async.eachLimit.html)
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- [`map`](http://suguru03.github.io/neo-async/doc/async.map.html)
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- [`mapSeries`](http://suguru03.github.io/neo-async/doc/async.mapSeries.html)
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- [`mapLimit`](http://suguru03.github.io/neo-async/doc/async.mapLimit.html)
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- [`mapValues`](http://suguru03.github.io/neo-async/doc/async.mapValues.html)
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- [`mapValuesSeries`](http://suguru03.github.io/neo-async/doc/async.mapValuesSeries.html)
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- [`mapValuesLimit`](http://suguru03.github.io/neo-async/doc/async.mapValuesLimit.html)
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- [`filter`](http://suguru03.github.io/neo-async/doc/async.filter.html)
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- [`filterSeries`](http://suguru03.github.io/neo-async/doc/async.filterSeries.html)
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- [`filterLimit`](http://suguru03.github.io/neo-async/doc/async.filterLimit.html)
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- [`select`](http://suguru03.github.io/neo-async/doc/async.filter.html) -> [`filter`](http://suguru03.github.io/neo-async/doc/async.filter.html)
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- [`selectSeries`](http://suguru03.github.io/neo-async/doc/async.filterSeries.html) -> [`filterSeries`](http://suguru03.github.io/neo-async/doc/async.filterSeries.html)
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- [`selectLimit`](http://suguru03.github.io/neo-async/doc/async.filterLimit.html) -> [`filterLimit`](http://suguru03.github.io/neo-async/doc/async.filterLimit.html)
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- [`reject`](http://suguru03.github.io/neo-async/doc/async.reject.html)
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- [`rejectSeries`](http://suguru03.github.io/neo-async/doc/async.rejectSeries.html)
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- [`rejectLimit`](http://suguru03.github.io/neo-async/doc/async.rejectLimit.html)
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- [`detect`](http://suguru03.github.io/neo-async/doc/async.detect.html)
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- [`detectSeries`](http://suguru03.github.io/neo-async/doc/async.detectSeries.html)
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- [`detectLimit`](http://suguru03.github.io/neo-async/doc/async.detectLimit.html)
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- [`find`](http://suguru03.github.io/neo-async/doc/async.detect.html) -> [`detect`](http://suguru03.github.io/neo-async/doc/async.detect.html)
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- [`findSeries`](http://suguru03.github.io/neo-async/doc/async.detectSeries.html) -> [`detectSeries`](http://suguru03.github.io/neo-async/doc/async.detectSeries.html)
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- [`findLimit`](http://suguru03.github.io/neo-async/doc/async.detectLimit.html) -> [`detectLimit`](http://suguru03.github.io/neo-async/doc/async.detectLimit.html)
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- [`pick`](http://suguru03.github.io/neo-async/doc/async.pick.html) *
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- [`pickSeries`](http://suguru03.github.io/neo-async/doc/async.pickSeries.html) *
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- [`pickLimit`](http://suguru03.github.io/neo-async/doc/async.pickLimit.html) *
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- [`omit`](http://suguru03.github.io/neo-async/doc/async.omit.html) *
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- [`omitSeries`](http://suguru03.github.io/neo-async/doc/async.omitSeries.html) *
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- [`omitLimit`](http://suguru03.github.io/neo-async/doc/async.omitLimit.html) *
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- [`reduce`](http://suguru03.github.io/neo-async/doc/async.reduce.html)
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- [`inject`](http://suguru03.github.io/neo-async/doc/async.reduce.html) -> [`reduce`](http://suguru03.github.io/neo-async/doc/async.reduce.html)
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- [`foldl`](http://suguru03.github.io/neo-async/doc/async.reduce.html) -> [`reduce`](http://suguru03.github.io/neo-async/doc/async.reduce.html)
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- [`reduceRight`](http://suguru03.github.io/neo-async/doc/async.reduceRight.html)
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- [`foldr`](http://suguru03.github.io/neo-async/doc/async.reduceRight.html) -> [`reduceRight`](http://suguru03.github.io/neo-async/doc/async.reduceRight.html)
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- [`transform`](http://suguru03.github.io/neo-async/doc/async.transform.html)
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- [`transformSeries`](http://suguru03.github.io/neo-async/doc/async.transformSeries.html) *
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- [`transformLimit`](http://suguru03.github.io/neo-async/doc/async.transformLimit.html) *
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- [`sortBy`](http://suguru03.github.io/neo-async/doc/async.sortBy.html)
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- [`sortBySeries`](http://suguru03.github.io/neo-async/doc/async.sortBySeries.html) *
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- [`sortByLimit`](http://suguru03.github.io/neo-async/doc/async.sortByLimit.html) *
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- [`some`](http://suguru03.github.io/neo-async/doc/async.some.html)
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- [`someSeries`](http://suguru03.github.io/neo-async/doc/async.someSeries.html)
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- [`someLimit`](http://suguru03.github.io/neo-async/doc/async.someLimit.html)
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- [`any`](http://suguru03.github.io/neo-async/doc/async.some.html) -> [`some`](http://suguru03.github.io/neo-async/doc/async.some.html)
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- [`anySeries`](http://suguru03.github.io/neo-async/doc/async.someSeries.html) -> [`someSeries`](http://suguru03.github.io/neo-async/doc/async.someSeries.html)
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- [`anyLimit`](http://suguru03.github.io/neo-async/doc/async.someLimit.html) -> [`someLimit`](http://suguru03.github.io/neo-async/doc/async.someLimit.html)
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- [`every`](http://suguru03.github.io/neo-async/doc/async.every.html)
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- [`everySeries`](http://suguru03.github.io/neo-async/doc/async.everySeries.html)
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- [`everyLimit`](http://suguru03.github.io/neo-async/doc/async.everyLimit.html)
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- [`all`](http://suguru03.github.io/neo-async/doc/async.every.html) -> [`every`](http://suguru03.github.io/neo-async/doc/async.every.html)
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- [`allSeries`](http://suguru03.github.io/neo-async/doc/async.everySeries.html) -> [`every`](http://suguru03.github.io/neo-async/doc/async.everySeries.html)
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- [`allLimit`](http://suguru03.github.io/neo-async/doc/async.everyLimit.html) -> [`every`](http://suguru03.github.io/neo-async/doc/async.everyLimit.html)
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- [`concat`](http://suguru03.github.io/neo-async/doc/async.concat.html)
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- [`concatSeries`](http://suguru03.github.io/neo-async/doc/async.concatSeries.html)
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- [`concatLimit`](http://suguru03.github.io/neo-async/doc/async.concatLimit.html) *
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### Control Flow
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- [`parallel`](http://suguru03.github.io/neo-async/doc/async.parallel.html)
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- [`series`](http://suguru03.github.io/neo-async/doc/async.series.html)
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- [`parallelLimit`](http://suguru03.github.io/neo-async/doc/async.series.html)
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- [`tryEach`](http://suguru03.github.io/neo-async/doc/async.tryEach.html)
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- [`waterfall`](http://suguru03.github.io/neo-async/doc/async.waterfall.html)
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- [`angelFall`](http://suguru03.github.io/neo-async/doc/async.angelFall.html) *
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- [`angelfall`](http://suguru03.github.io/neo-async/doc/async.angelFall.html) -> [`angelFall`](http://suguru03.github.io/neo-async/doc/async.angelFall.html) *
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- [`whilst`](#whilst)
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- [`doWhilst`](#doWhilst)
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- [`until`](#until)
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- [`doUntil`](#doUntil)
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- [`during`](#during)
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- [`doDuring`](#doDuring)
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- [`forever`](#forever)
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- [`compose`](#compose)
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- [`seq`](#seq)
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- [`applyEach`](#applyEach)
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- [`applyEachSeries`](#applyEachSeries)
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- [`queue`](#queue)
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- [`priorityQueue`](#priorityQueue)
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- [`cargo`](#cargo)
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- [`auto`](#auto)
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- [`autoInject`](#autoInject)
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- [`retry`](#retry)
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- [`retryable`](#retryable)
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- [`iterator`](#iterator)
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- [`times`](http://suguru03.github.io/neo-async/doc/async.times.html)
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- [`timesSeries`](http://suguru03.github.io/neo-async/doc/async.timesSeries.html)
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- [`timesLimit`](http://suguru03.github.io/neo-async/doc/async.timesLimit.html)
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- [`race`](#race)
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### Utils
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- [`apply`](#apply)
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- [`setImmediate`](#setImmediate)
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- [`nextTick`](#nextTick)
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- [`memoize`](#memoize)
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- [`unmemoize`](#unmemoize)
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- [`ensureAsync`](#ensureAsync)
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183
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- [`constant`](#constant)
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- [`asyncify`](#asyncify)
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185
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- [`wrapSync`](#asyncify) -> [`asyncify`](#asyncify)
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- [`log`](#log)
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- [`dir`](#dir)
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188
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- [`timeout`](http://suguru03.github.io/neo-async/doc/async.timeout.html)
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- [`reflect`](#reflect)
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- [`reflectAll`](#reflectAll)
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- [`createLogger`](#createLogger)
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## Mode
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194
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- [`safe`](#safe) *
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- [`fast`](#fast) *
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197
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## Benchmark
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198
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199
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[Benchmark: Async vs Neo-Async](http://suguru03.hatenablog.com/entry/2016/06/10/135559)
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200
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### How to check
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202
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203
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```bash
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204
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$ node perf
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205
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```
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### Environment
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208
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209
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* Darwin 17.3.0 x64
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* Node.js v8.9.4
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211
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* async v2.6.0
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212
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* neo-async v2.5.0
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213
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* benchmark v2.1.4
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214
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215
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### Result
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216
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217
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The value is the ratio (Neo-Async/Async) of the average speed.
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219
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#### Collections
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220
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|function|benchmark|
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221
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|---|--:|
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222
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|each/forEach|2.43|
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223
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|eachSeries/forEachSeries|1.75|
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224
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|eachLimit/forEachLimit|1.68|
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225
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|eachOf|3.29|
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226
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|eachOfSeries|1.50|
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227
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|eachOfLimit|1.59|
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228
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|map|3.95|
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229
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|mapSeries|1.81|
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230
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|mapLimit|1.27|
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231
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|mapValues|2.73|
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232
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|mapValuesSeries|1.59|
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233
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|mapValuesLimit|1.23|
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234
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|filter|3.00|
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235
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|filterSeries|1.74|
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236
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|filterLimit|1.17|
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237
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|reject|4.59|
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238
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|rejectSeries|2.31|
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239
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|rejectLimit|1.58|
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240
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|detect|4.30|
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241
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|detectSeries|1.86|
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242
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|detectLimit|1.32|
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243
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|reduce|1.82|
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244
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|transform|2.46|
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245
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|sortBy|4.08|
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246
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|some|2.19|
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247
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|someSeries|1.83|
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248
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|someLimit|1.32|
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249
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|every|2.09|
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250
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|everySeries|1.84|
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251
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|everyLimit|1.35|
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252
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|concat|3.79|
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253
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|concatSeries|4.45|
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254
|
|
255
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#### Control Flow
|
256
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|funciton|benchmark|
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257
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|---|--:|
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258
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|parallel|2.93|
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259
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|series|1.96|
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260
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|waterfall|1.29|
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261
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|whilst|1.00|
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262
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|doWhilst|1.12|
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263
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|until|1.12|
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264
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|doUntil|1.12|
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265
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|during|1.18|
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266
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|doDuring|2.42|
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267
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|times|4.25|
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268
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|auto|1.97|
|