1.Light House (Google)
Google Lighthouse is an open-source, automated tool for measuring the quality of web pages.I used google light house which really helps you to improve your app performance.
https://developers.google.com/web/tools/lighthouse
2.GT Metrix
GTmetrix is a free tool that analyzes your page's speed performance. It's also a similar tool you can place you are url and check the performance.(now GTmetrix is powered by lighthouse)
Top comments (1)
Lighthouse Scoring Calculator:
Few more tools to measure performance: