Added example of debugging memory usage using Chrome/Chromium

README.md

@@ -1,2 +1,15 @@
 # nodejs_warsaw_xxii
 
+1. ```git clone git@git.techserio.com:mattiashz/nodejs_warsaw_xxii.git```
+2. ```cd nodejs_warsaw_xxii```
+3. ```npm install```
+4. ```node main.js```
+5. ```curl localhost:3000/helloworld```
+6. ```curl localhost:3000/hogger```
+5. open terminal
+6. ```ps aux | grep "node main.js"```
+7. ```kill -USR1 <process number>```
+8. Open Chrome / Chromium
+9. go to address ```chrome://inspect```
+10. Click "Open dedicated DevTools for Node"
+

main.js

@@ -0,0 +1,26 @@
+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');
+});

package.json

@@ -0,0 +1,18 @@
+{
+  "name": "nodejs_warsaw_xxii",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git@git.techserio.com:mattiashz/nodejs_warsaw_xxii.git"
+  },
+  "author": "hz",
+  "license": "ISC",
+  "dependencies": {
+    "express": "^5.1.0"
+  }
+}