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#Performance — All content tagged with this topic.

Implementation Guides

Glossary Terms

Core Web Vitals

Core Web Vitals are Google's three key metrics that measure real-world user experience on web pages: Largest Contentful Paint (LCP), Interaction to Next Paint (INP),…

Largest Contentful Paint (LCP)

Largest Contentful Paint measures how long it takes for the largest visible content element on a webpage to fully render, typically an image, video, or…

Cumulative Layout Shift (CLS)

Cumulative Layout Shift measures the visual stability of a webpage by tracking unexpected layout movements during the page loading process, calculated as the sum of…

Interaction to Next Paint (INP)

Interaction to Next Paint measures the responsiveness of a webpage by tracking the time from when a user interacts with the page to when the…

First Contentful Paint (FCP)

First Contentful Paint measures the time from when a page starts loading to when any part of the page's content is rendered on the screen,…

Page Speed

Page speed measures how quickly a web page loads and becomes fully interactive for users, encompassing both server response time and rendering performance. Why Page…

Time to First Byte (TTFB)

Time to First Byte measures the duration from when a user makes an HTTP request to when the first byte of response data is received…

Render-Blocking Resources

Render-blocking resources are CSS and JavaScript files that prevent the browser from displaying content until they are fully downloaded and processed, delaying the initial page…

Lazy Loading

Lazy loading is a technique that defers loading non-critical resources, particularly images and videos, until they are needed or about to enter the viewport, reducing…