nworker v0.2.2

nworker

A node.js library to run cpu-intensive tasks in a separate processes and not block the event loop.

Install

Install via npm:

$ npm i nworker

Node.js greater than 6.6.0 highly recommended.

Examples

Simple

entry.js

exports.fibonacci = function fibonacci(n) {
  if (n < 2) return n;
  return fibonacci(n - 2) + fibonacci(n - 1);
};

app.js

const {Pool} = require('nworker');

const pool = new Pool(require.resolve('./entry'), {
  enabled: true
});

(async () => {
  const result = await pool.execute('fibonacci', 10);
  console.log('result: ' + result); // => result: 55
  await pool.close();
})();

Advanced

Advanced examples see examples

Benchmarks

To run benchmarks, run:

$ npm install
$ npm run benchmark

It will run a performance test against the selected libraries:

• data in: an object that consists of a single field that is a 0.5MB random string
• data out: received object stringified and concatenated with another 1MB string

Example results:

results for 100 executions

name                  time: total [ms]  time usr [ms]  time sys [ms]  worker usr [ms]  worker sys [ms]  mem rss [MB]  worker rss [MB]  errors
--------------------  ----------------  -------------  -------------  ---------------  ---------------  ------------  ---------------  ------
no-workers                         149            240             45                0                0           103                0       0
nworker-direct@0.2.1               153            272             50              269               49           102              102       0
nworker-spawn@0.2.1                755            773            410              224               77           270              112       0
workerpool@2.3.0                  1443           1587            603              333               95           118               52       0
worker-nodes@1.6.0                1446            713            391             1136              396           240              112       0
worker-farm@1.6.0                 2485           1618            551             1362              435            70               53       0
process-pool@0.3.5                2511           1775            553             1470              441            74               52       0
worker-pool@3.0.2                19869          25586           7026             2805              619            78               76       0

  os : Darwin / 17.5.0 / x64                        
 cpu : Intel(R) Core(TM) i7-4850HQ CPU @ 2.30GHz × 8
node : 10.0.0 / v8: 6.6.346.24-node.5   

License

Copyright 2018 taoyuan <towyuan@outlook.com>

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

 http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.