Neo-Async is a drop-in replacement for Async, it almost fully covers its functionality and runs faster
The neo-async package is a utility module which provides straight-forward, powerful functions for working with asynchronous JavaScript. It is similar to the async package but with some performance improvements.
Control Flow
Execute a series of functions in sequential order. Each function is passed a callback it must call on completion.
async.series([
function(callback) {
// do some stuff ...
callback(null, 'one');
},
function(callback) {
// do some more stuff ...
callback(null, 'two');
}
],
function(err, results) {
// results is now equal to ['one', 'two']
});Collections
Apply a function to each item in a collection and collect the results.
async.map(['file1','file2','file3'], fs.stat, function(err, results) {
// results is now an array of stats for each file
});Utilities
Call a function a certain number of times and collect the results.
async.times(5, function(n, next) {
createUser(n, function(err, user) {
next(err, user);
});
}, function(err, users) {
// we should now have 5 users
});The original async package offers a wide array of functions for working with asynchronous code. Neo-async claims to offer similar functionality with improved performance.
Bluebird is a full-featured promise library with a focus on innovative features and performance. It can be used as an alternative to neo-async for handling asynchronous operations using promises instead of callbacks.
Q is a tool for making and composing asynchronous promises in JavaScript. It's an older promise library that can serve similar purposes to neo-async but with a different style of handling async operations.
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!
<script src="async.min.js"></script>
require(['async'], function(async) {});
I recommend to use Aigle.
It is optimized for Promise handling and has almost the same functionality as neo-async.
$ npm install neo-async
var async = require('neo-async');
$ npm install neo-async
$ ln -s ./node_modules/neo-async ./node_modules/async
var async = require('async');
bower install neo-async
* not in Async
eacheachSerieseachLimitforEach -> eachforEachSeries -> eachSeriesforEachLimit -> eachLimiteachOf -> eacheachOfSeries -> eachSerieseachOfLimit -> eachLimitforEachOf -> eachforEachOfSeries -> eachSerieseachOfLimit -> forEachLimitmapmapSeriesmapLimitmapValuesmapValuesSeriesmapValuesLimitfilterfilterSeriesfilterLimitselect -> filterselectSeries -> filterSeriesselectLimit -> filterLimitrejectrejectSeriesrejectLimitdetectdetectSeriesdetectLimitfind -> detectfindSeries -> detectSeriesfindLimit -> detectLimitpick *pickSeries *pickLimit *omit *omitSeries *omitLimit *reduceinject -> reducefoldl -> reducereduceRightfoldr -> reduceRighttransformtransformSeries *transformLimit *sortBysortBySeries *sortByLimit *somesomeSeriessomeLimitany -> someanySeries -> someSeriesanyLimit -> someLimiteveryeverySerieseveryLimitall -> everyallSeries -> everyallLimit -> everyconcatconcatSeriesconcatLimit *parallelseriesparallelLimittryEachwaterfallangelFall *angelfall -> angelFall *whilstdoWhilstuntildoUntilduringdoDuringforevercomposeseqapplyEachapplyEachSeriesqueuepriorityQueuecargoautoautoInjectretryretryableiteratortimestimesSeriestimesLimitraceapplysetImmediatenextTickmemoizeunmemoizeensureAsyncconstantasyncifywrapSync -> asyncifylogdirtimeoutreflectreflectAllcreateLogger$ node perf
The value is the ratio (Neo-Async/Async) of the average speed.
| 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 |
| 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 |
FAQs
Neo-Async is a drop-in replacement for Async, it almost fully covers its functionality and runs faster
The npm package neo-async receives a total of 18,851,847 weekly downloads. As such, neo-async popularity was classified as popular.
We found that neo-async demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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