const express = require('express');
const app = express();

app.get('/helloworld', (req, res) => {
    res.send('hello, world');
});

app.get('/hogger', (req, res) => {
    let buf = Buffer.alloc(100 * 1024 * 1024);      // 100 MB
    for (let i = 0; i < buf.length; i += 4096) {    // touch each 4KB page → real RSS
        buf[i] = 1;
    }
    setTimeout(() => {
        res.send('hog done');
        buf = null;
    }, 10_000);
});

setInterval(() => {
    const m = process.memoryUsage();
    console.log( `rss: ${(m.rss/1024/1024).toFixed(1)} MB, ` + `heapUsed: ${(m.heapUsed/1024/1024).toFixed(1)} MB, ` +
        `external: ${(m.external/1024/1024).toFixed(1)} MB`);}, 1000);

app.listen(3000, () => {
    console.log('Listening on http://localhost:3000');
    console.log('Listening on http://localhost:3000/helloworld');
    console.log('Listening on http://localhost:3000/hogger');
});