Web Page Performance
| FP | First Paint |
| FCP | First Contentful Paint |
| LCP | Largest Contentful Paint |
| CLS | Cumulative Layout Shift |
| TTI | Time To Interactive |
| TBT | Total Blocking Time |
| INP | Interaction to Next Paint |
| FID | First Input Delay |
FP: The first time pixels start to become visible to the user
FCP: The time when requested content (article body, etc) starts to render meaningfully.
LCP: The render time of the largest content element visible in the viewport.
CLS: The additive impact of layout instability while a page is loading
TTI: The time at which a page become interactive (events wired up etc.)
TBT: The total amount of time interaction is blocked between FCP and TTI
INP: The time it takes a page to visually respond to user interaction
FID: The interaction delay after the first user interaction with the page
