A node.js library to run cpu-intensive tasks in a separate processes and not block the event loop.
Install via npm:
$ npm i nworkerNode.js greater than 6.6.0 highly recommended.
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 examples see examples
To run benchmarks, run:
$ npm install
$ npm run benchmarkIt 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
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.