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// threads.mjs
import { Worker, isMainThread,
workerData, parentPort } from 'node:worker_threads';
if (isMainThread) {
const data = 'some data';
const worker = new Worker(import.meta.filename, { workerData: data });
worker.on('message', msg => console.log('Reply from Thread:', msg));
} else {
const source = workerData;
parentPort.postMessage(btoa(source.toUpperCase()));
}
// run with
node threads.mjs