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jest-worker

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jest-worker

Module for executing heavy tasks under forked processes in parallel, by providing a `Promise` based interface, minimum overhead, and bound workers.

  • 22.0.1
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  • npm
  • Socket score

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59M
increased by2.73%
Maintainers
2
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What is jest-worker?

The jest-worker npm package is a module designed to make it easy to move heavy processing tasks to child processes, thus enabling better use of multi-core systems and improving the performance of Node.js applications. It is primarily used to parallelize work across processes and manage communication between the main thread and worker threads.

What are jest-worker's main functionalities?

Creating a Worker Pool

This feature allows you to create a pool of workers that can execute functions from a specified module file. The 'heavyTask.js' module would export the functions that you want to run on separate threads.

const { Worker } = require('jest-worker');
const worker = new Worker(require.resolve('./heavyTask.js'));
const result = await worker.myHeavyTask(args);

Sending and Receiving Data

With jest-worker, you can send data to worker threads for processing and receive the processed data back in the main thread. The 'dataProcessor.js' module would contain the 'processData' function that handles the data processing logic.

const { Worker } = require('jest-worker');
const worker = new Worker(require.resolve('./dataProcessor.js'));
const processedData = await worker.processData(rawData);

Ending Worker Processes

This feature allows you to properly shut down the worker processes once you're done with them, freeing up system resources.

const { Worker } = require('jest-worker');
const worker = new Worker(require.resolve('./task.js'));
// ... use the worker
await worker.end();

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Package last updated on 18 Dec 2017

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