What are worker threads in Node.js?

Worker threads allow you to run JavaScript code in parallel on multiple threads within the

same process — useful for CPU-intensive tasks like image processing or complex

calculations without blocking the main event loop.

const { Worker } = require('worker_threads');
const worker = new Worker('./worker.js');
worker.on('message', (msg) => console.log('From worker:', msg));

worker.postMessage('start');