How to use multiple processes in webpack?

@lew 

To use multiple processes in webpack, you can take advantage of the Parallel Webpack plugin. This plugin allows you to run webpack builds in parallel on multiple processes, which can greatly improve build times especially for larger projects.

Here's how you can use the Parallel Webpack plugin in your webpack configuration:

1. Install the plugin by running the following command in your project directory:

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npm install --save-dev parallel-webpack

1. In your webpack configuration file (usually named webpack.config.js), require the ParallelWebpack plugin at the top:

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const ParallelWebpack = require('parallel-webpack');

1. Add a new instance of the ParallelWebpack plugin to your webpack configuration plugins array:

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module.exports = {
  // your webpack configuration settings

  plugins: [
    new ParallelWebpack({
      // parallel-webpack options
    }),
  ],
};

1. You can configure the ParallelWebpack plugin with options to control how many processes to run in parallel and other settings. Here's an example configuration for running 4 processes in parallel:

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plugins: [
  new ParallelWebpack({
    watch: true, // enables watch mode
    maxConcurrentWorkers: 4, // number of processes to run in parallel
  }),
],

1. Now when you run webpack to build your project, the ParallelWebpack plugin will split the build process across multiple processes, speeding up the build time.

Keep in mind that running multiple processes in parallel can increase your overall system resource usage, so make sure your machine can handle it. Additionally, not all webpack configurations may benefit from parallel processing, so it's a good idea to test and compare build times with and without the ParallelWebpack plugin to see if it makes a significant difference for your project.