replaced pptr metrics with nodejs's os

load_index.js

+var os = require('os');
 var args = require("yargs")
 .usage("Usage : load_index.js -saveAs metadata/attachment -file file_path")
 .demandOption(['file'])
@@ -16,7 +17,7 @@ if (!(args.saveAs === "metadata" ||args.saveAs === "attachment")){
 var saveAs = args.saveAs;
 
 const puppeteer = require('puppeteer');
-var browser, page;
+var browser, page, ramBefore, memBefore;
 
 const si = require("systeminformation");
 
@@ -26,14 +27,13 @@ var ws = new Server({port: port});
 ws.on('connection', function(w){
   w.on('message', function(msg){
     console.log(msg);
-    page.metrics()
-      .then(function(values){
-      console.log(values.JSHeapUsedSize / 1024 / 1024);
-      si.mem(function(data){
-        console.log(data.used / 1024 / 1024);
-      });
-      browser.close();
-      });
+    var ramAfter = (os.totalmem() - os.freemem()) / 1024 / 1024;
+    var ramUsed = ramAfter - ramBefore;
+    console.log("Ram used : " + ramUsed + " MB");
+    si.mem(function(data){
+      console.log("Memory used : " + (data.used / 1024 / 1024 - memBefore) + " MB");
+    });
+    browser.close();
   });
   w.on('close', function() {
     ws.close();
@@ -43,10 +43,9 @@ ws.on('connection', function(w){
 (async () => {
   browser = await puppeteer.launch();
   page = await browser.newPage();
-  var metrics = await page.metrics();
-  console.log(metrics.JSHeapUsedSize / 1024 / 1024);
+  ramBefore = (os.totalmem() - os.freemem()) / 1024 / 1024;
   si.mem(function(data){
-    console.log(data.used / 1024 / 1024);
+    memBefore = data.used / 1024 / 1024;
   });
   await page.goto('https://softinst115787.host.vifib.net/public/unit_tests/index_load.html?saveAs='+saveAs);
   const [fileChooser] = await Promise.all([