How to move the execution of a function to a separate process and return the result?

Question

Node.js

I am writing an application in Electron. In it, a function is called doWithArray ()that converts a multidimensional array. The problem is that often this array is huge. And it takes a long time to process. And for the duration of the processing, the application interface does not respond.
Is it possible to execute this function in a separate process so that the interface is not "frozen" and then return the result to the parent?

Answer 1

Something like this.

let promise = new Promise((resolve, reject) => {
    doWithArray(...)
    resolve(...)
}).then(...).catch(...)

This is the easiest option. It's not in a separate process - it's asynchronous. Those. calculations will be carried out in the same thread, but will not interfere with the main process - the interface will not be frozen.
To really put it into a separate process, you need to use https://nodejs.org/api/child_process.html

Answer 2

const fork = require('child_process');
const childModule = fork('./your_module');
childModule.on('message', callback)

Create a module from your function, fork it, put handlers.
fork