Node.js Advanced Architecture — Scaling Beyond the Single Thread

📄 main.js (Manager)

const { Worker } = require("worker_threads");

function runService(workerData) {
    return new Promise((resolve, reject) => {
        const worker = new Worker("./worker.js", { workerData });
        worker.on("message", resolve);
        worker.on("error", reject);
    });
}

async function run() {
    const result = await runService("Hello");
    console.log(result);
}
run();

🛠️ worker.js (The Labor)

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

let sum = 0;
for (let i = 0; i < 1e9; i++) sum += i;

parentPort.postMessage({ result: sum, msg: workerData });