index.js

/*
*  File Name: index.js
*  Description: This is the main thread
*/
const express = require("express");
const { Worker } = require("worker_threads");
const app = express();
const port = 3000;
const getSum = (limit) => {
let sum = 0;
for (let i = 0; i < limit; i++) {
     sum += i;
}
return sum;
};
app.get("/", (req, res) => {
const result = getSum(1000);
res.send(`Processed function getSum on main thread and result: ${result}`);
});
app.get("/seprate-thread", (req, res) => {
const seprateThread = new Worker(__dirname + "/seprateThread.js");
seprateThread.on("message", (result) => {
res.send(`Processed function getSum on seprate thread: ${result}`);
});
seprateThread.postMessage(1000);
});
app.listen(port, () => {
console.log(`Example app listening at http://localhost:${port}`);
});