Measuring performance and responsiveness

Chrome DevTools

Chrome comes with two important tools for measuring performance of the website - the performance tab and a tool called Lighthouse. The former provides to ability to record loading the page with screenshots, CPU usage, and network requests. The latter used to be a standalone tool, now integrated into Chrome under the Audits tab, scores the website responsiveness and performance according to Google's guidelines.

Other tools

• Pagespeed Insights, another tool from Google providing functionality to the Lighthouse.
• YSlow, alternative created by Yahoo!.
• Pagelocity, another tool that measures performance and SEO.