Neo-Async is thought to be used as 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.
Async allows double callbacks in waterfall, but Neo-Async does not allow. (test)
PR is welcome ! Especially improvement for English documents :)
<script src="async.min.js"></script>
require(['async'], function(async) {});
$ npm install neo-async
var async = require('neo-async');
// safe mode
var async = require('neo-async').safe; // avoid stack overflow if iterator is called on sync.
$ 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 -> forEachLimitmapmapSeriesmapLimitmapValues *mapValuesSeries *mapValuesLimit *filterfilterSeriesfilterLimitselect -> filterselectSeries -> filterSeriesselectLimit -> filterLimitrejectrejectSeriesrejectLimitdetectdetectSeriesdetectLimitpick *pickSeries *pickLimit *omit *omitSeries *omitLimit *reduceinject -> reducefoldl -> reducereduceRightfoldr -> reduceRighttransform *transformSeries *transformLimit *sortBysortBySeriessortByLimit *somesomeSeriessomeLimitany -> someeveryeverySeries *everyLimitall -> everyconcatconcatSeriesconcatLimit *parallelseriesparallelLimitwaterfallangelFall *angelfall -> angelFall *whilstdoWhilstuntilforevercomposeseqapplyEachapplyEachSeriesqueuepriorityQueuecargoautoretryiteratortimestimesSeriestimesLimitapplynextTicksetImmediatesafeNextTick *asyncifywrapSync -> asyncifyconstantensureAsyncmemoizeunmemoizelogdircreateLoggernoConflicteventEmitter *EventEmitter *safe *var async = require('neo-async').safe;
// or
var async = require('neo-async');
async.safe.each(collection, iterator, callback);
Speed comparison of server-side measured by func-comparator.
Specifications are as follows.
execute
Execution environment are as follows.
$ node perf/func-comparator
result
The value is the ratio (Neo-Async/Async) of the average speed per n times.
| function | node v0.10.40 | node v0.12.7 | iojs v2.3.4 |
|---|---|---|---|
| each | 2.01 | 1.95 | 2.19 |
| eachSeries | 2.28 | 2.62 | 2.28 |
| eachLimit | 2.33 | 3.32 | 2.81 |
| eachOf | 1.93 | 1.92 | 2.12 |
| eachOfSeries | 2.17 | 2.79 | 2.98 |
| eachOfLimit | 2.03 | 1.54 | 2.57 |
| map | 3.10 | 3.11 | 3.38 |
| mapSeries | 2.36 | 1.98 | 2.32 |
| mapLimit | 1.76 | 1.84 | 2.06 |
| filter | 2.33 | 3.70 | 6.59 |
| filterSeries | 2.11 | 2.71 | 3.68 |
| reject | 2.71 | 4.38 | 7.33 |
| rejectSeries | 2.31 | 3.09 | 3.86 |
| detect | 2.31 | 2.69 | 2.92 |
| detectSeries | 2.13 | 1.96 | 2.71 |
| reduce | 2.09 | 1.94 | 2.26 |
| reduceRight | 2.19 | 1.93 | 2.51 |
| sortBy | 1.41 | 1.66 | 1.52 |
| some | 2.23 | 2.29 | 2.50 |
| every | 2.22 | 2.25 | 2.93 |
| concat | 12.0 | 7.23 | 10.0 |
| concatSeries | 8.37 | 5.15 | 8.05 |
| function | node v0.10.40 | node v0.12.7 | iojs v2.3.4 |
|---|---|---|---|
| parallel | 4.13 | 5.00 | 3.37 |
| series | 3.13 | 2.70 | 3.03 |
| parallelLimit | 2.69 | 2.96 | 2.49 |
| waterfall | 3.45 | 7.24 | 7.59 |
| whilst | 1.02 | 1.09 | 1.14 |
| doWhilst | 1.26 | 1.36 | 1.28 |
| until | 1.02 | 1.08 | 1.13 |
| doUntil | 1.25 | 1.31 | 1.34 |
| during | 2.15 | 2.08 | 2.08 |
| doDuring | 5.08 | 5.77 | 5.39 |
| times | 4.07 | 3.16 | 3.44 |
| timesSeries | 2.82 | 2.58 | 2.71 |
| timesLimit | 2.23 | 2.05 | 1.93 |
FAQs
Neo-Async is a drop-in replacement for Async, it almost fully covers its functionality and runs faster
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.
Did you know?
Socket for GitHub automatically highlights issues in each pull request and monitors the health of all your open source dependencies. Discover the contents of your packages and block harmful activity before you install or update your dependencies.
Security News
Research
An advanced npm supply chain attack is leveraging Ethereum smart contracts for decentralized, persistent malware control, evading traditional defenses.
Security News
Research
Attackers are impersonating Sindre Sorhus on npm with a fake 'chalk-node' package containing a malicious backdoor to compromise developers' projects.
Security News
The npm package for the LottieFiles Player web component was hit with a supply chain attack after a software engineer's npmjs credentials were compromised.