Massive CPU/RAM usage caused by using UserDataDir

Steps to reproduce

Tell us about your environment:

• Puppeteer version: “puppeteer”: “^3.1.0”, (Updating to latest version didn’t help)
• Platform / OS version: Ubuntu 18.04
• URLs (if applicable): Any URL
• Node.js version: 12.16.3
• Hardware Info: 4690k + 32Gbs of RAM + Puppeteer running on a good SSD

What steps will reproduce the problem? Adding userDataDir to launch options will produce the problem. It will make page loads slower, CPU usage much higher and it will start eating RAM.
This happens on a number of pages. Behavior is pretty reliable. Task manager shows the CPU usage mainly by chrome.

Deleting the dataDir doesn’t change anything

Removing the setting results in dramatically lower CPU usage…

Please include code that reproduces the issue.

const puppeteer = require('puppeteer');
var os = require('os-utils');
//This be a promise ,
const browserPromise = puppeteer.launch({ headless: true,userDataDir: './puppeteer_data'  }).then(async browser => {return browser})

function getCpuUsage(){
    os.cpuUsage(function(v){
        console.log( 'CPU Usage (%): ' + v );
    });
}

async function testScrape(url){
    console.log('processing: '+url)
    let r = Math.random().toString(36).substring(7);
    let browser = await browserPromise
    getCpuUsage()

    let page = await browser.newPage();

    await page.goto(url);
    console.log('went to url: '+url)
    getCpuUsage()

    await takeScreenShot(page,r+'initialLoad.png');
    getCpuUsage()
}

async function takeScreenShot(page,fileName){
    page.screenshot({path: 'screenshots/'+fileName,fullPage: true});
}

async function run(){
    await testScrape('https://github.com/puppeteer/puppeteer/blob/master/docs/troubleshooting.md')
    await testScrape('https://github.com/puppeteer/puppeteer/blob/master/docs/troubleshooting.md')
    console.log('Donezo')
}
run()

What is the expected result? Expected it to not start abusing my CPU like there’s no tomorrow

What happens instead? It did it anyway.

[suchcodemuchwow]

I had exact same issues that you guys mentioned. The solution worked out for me was changing userDataDir path to absolute path. Instead of this: userDataDir: 'data' use this: userDataDir: '/Users/batu/Desktop/status/data'

[stale[bot]]

We are closing this issue. If the issue still persists in the latest version of Puppeteer, please reopen the issue and update the description. We will try our best to accomodate it!