Worker threads example

sorter.js

const { parentPort, workerData, isMainThread } = require("worker_threads");

// CPU consuming function (sorting a big array)
function sortBigArray(bigArray) {
  return bigArray.sort((a, b) => a - b);
}

// check that the sorter was called as a worker thread
if (!isMainThread) {
  // make sure we got an array of data
  if (!Array.isArray(workerData)) {
    // we can throw an error to emit the "error" event from the worker
    throw new Error("workerData must be an array of numbers");
  }
  // we post a message through the parent port, to emit the "message" event
  parentPort.postMessage(sortBigArray(workerData));
}