Find a utility/extension for website performance analysis?

Question

Performance evaluation

Hello! There is a site on the Aspro template (aspro.ru).
After all sorts of "modifications" and connection of analytics services, it began to shamelessly slow down.
When surfing the site under any browser, the laptop starts to warm up, as if I ran Crysis on ultras.

Advise which utilities or browser extensions can track down problematic scripts.

Maybe there are articles that explain in detail how to conduct a website performance analysis?

Thank you!

Answer 1

I use this
https://developers.google.com/speed/pagespeed/insi...

Answer 2

sitespeed.me./ru
https://www.webpagetest.org/
https://tools.pingdom.com/
https://tools.keycdn.com/speed
See download profile.

Answer 3

https://www.checkbot.io/

What can?

✓ SEO TESTS: Broken links, missing or long page titles/descriptions/H1s, duplicate content, invalid HTML/CSS/JavaScript, canonical URLs, image ALT tags, robots.txt, mobile scaling, 404 pages, temporary redirects, sitemap setup & URL names.
✓ PAGE SPEED TESTS: Minification, compression, caching, render blocking or duplicate CSS/JavaScript, redirecting URLs & redirect chains.
✓ WEB SECURITY TESTS: Security headers, HTTPS, HSTS, mixed content & insecure password forms.

Answer 4

Press F12 in the browser. There's a lot of useful stuff in there.
ps cho Google also banned?