Metrics
- First contentful paint
- measures the time it takes the browser to begin visibly rendering the webpage
- normally measured though loading the largest visible element
- Speed index
- measure of how fast the website’s DOM gets rendered
- shorter speed indices means the page will stablize faster
- First CPU idle (first Interactive)
- measure the time until the page is capable of handling the majority of user inputs in a “reasonable” amount of time.
- Time to Interactive
- measures the time until the user can meaningfully interact with the majority of the site with delays of under 50ms.
- Max Potential First Input Delay
- measures the maximum possible delay a user can experience after they attempt to interact with an element on the page
Source:
https://medium.com/hackers-at-cambridge/profiling-your-websites-performance-ff80881b7b15