Neo-Async is thought to be used as a drop-in replacement for Async, it almost fully covers its functionality and runs faster.

Benchmark is here!

Bluebird's benchmark is here!

Code Coverage

Installation

In a browser

<script src="async.min.js"></script>

In an AMD loader

require(['async'], function(async) {});

Promise and async/await

I recommend to use Aigle.

It is optimized for Promise handling and has almost the same functionality as neo-async.

Node.js

standard

$ npm install neo-async

var async = require('neo-async');

replacement

$ npm install neo-async
$ ln -s ./node_modules/neo-async ./node_modules/async

var async = require('async');

Bower

bower install neo-async

Feature

JSDoc

* not in Async

Collections

• each
• eachSeries
• eachLimit
• forEach -> each
• forEachSeries -> eachSeries
• forEachLimit -> eachLimit
• eachOf -> each
• eachOfSeries -> eachSeries
• eachOfLimit -> eachLimit
• forEachOf -> each
• forEachOfSeries -> eachSeries
• eachOfLimit -> forEachLimit
• map
• mapSeries
• mapLimit
• mapValues
• mapValuesSeries
• mapValuesLimit
• filter
• filterSeries
• filterLimit
• select -> filter
• selectSeries -> filterSeries
• selectLimit -> filterLimit
• reject
• rejectSeries
• rejectLimit
• detect
• detectSeries
• detectLimit
• find -> detect
• findSeries -> detectSeries
• findLimit -> detectLimit
• pick *
• pickSeries *
• pickLimit *
• omit *
• omitSeries *
• omitLimit *
• reduce
• inject -> reduce
• foldl -> reduce
• reduceRight
• foldr -> reduceRight
• transform
• transformSeries *
• transformLimit *
• sortBy
• sortBySeries *
• sortByLimit *
• some
• someSeries
• someLimit
• any -> some
• anySeries -> someSeries
• anyLimit -> someLimit
• every
• everySeries
• everyLimit
• all -> every
• allSeries -> every
• allLimit -> every
• concat
• concatSeries
• concatLimit *

Control Flow

• parallel
• series
• parallelLimit
• tryEach
• waterfall
• angelFall *
• angelfall -> angelFall *
• whilst
• doWhilst
• until
• doUntil
• during
• doDuring
• forever
• compose
• seq
• applyEach
• applyEachSeries
• queue
• priorityQueue
• cargo
• auto
• autoInject
• retry
• retryable
• iterator
• times
• timesSeries
• timesLimit
• race

Utils

• apply
• setImmediate
• nextTick
• memoize
• unmemoize
• ensureAsync
• constant
• asyncify
• wrapSync -> asyncify
• log
• dir
• timeout
• reflect
• reflectAll
• createLogger

Mode

• safe *
• fast *

Benchmark

Benchmark: Async vs Neo-Async

How to check

$ node perf

Environment

• Darwin 17.3.0 x64
• Node.js v8.9.4
• async v2.6.0
• neo-async v2.5.0
• benchmark v2.1.4

Result

The value is the ratio (Neo-Async/Async) of the average speed.

Collections

function	benchmark
each/forEach	2.43
eachSeries/forEachSeries	1.75
eachLimit/forEachLimit	1.68
eachOf	3.29
eachOfSeries	1.50
eachOfLimit	1.59
map	3.95
mapSeries	1.81
mapLimit	1.27
mapValues	2.73
mapValuesSeries	1.59
mapValuesLimit	1.23
filter	3.00
filterSeries	1.74
filterLimit	1.17
reject	4.59
rejectSeries	2.31
rejectLimit	1.58
detect	4.30
detectSeries	1.86
detectLimit	1.32
reduce	1.82
transform	2.46
sortBy	4.08
some	2.19
someSeries	1.83
someLimit	1.32
every	2.09
everySeries	1.84
everyLimit	1.35
concat	3.79
concatSeries	4.45

Control Flow

funciton	benchmark
parallel	2.93
series	1.96
waterfall	1.29
whilst	1.00
doWhilst	1.12
until	1.12
doUntil	1.12
during	1.18
doDuring	2.42
times	4.25
auto	1.97