User Experience Performance Single Region Diagnostic Results

Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds. [Learn more about the Total Blocking Time metric].

Optimized images load faster and consume less cellular data. [Learn how to efficiently encode images].

Optimize LCP by making the LCP image [discoverable] from the HTML immediately, and [avoiding lazy-loading]

Labels ensure that form controls are announced properly by assistive technologies, like screen readers. [Learn more about form element labels].

Serve images that are appropriately-sized to save cellular data and improve load time. [Learn how to size images].

A value greater than 0 implies an explicit navigation ordering. Although technically valid, this often creates frustrating experiences for users who rely on assistive technologies. [Learn more about the `tabindex` attribute].

Keep the server response time for the main document short because all other requests depend on it. [Learn more about the Time to First Byte metric].

Resources are blocking the first paint of your page. Consider delivering critical JS/CSS inline and deferring all non-critical JS/styles. [Learn how to eliminate render-blocking resources].

Link text (and alternate text for images, when used as links) that is discernible, unique, and focusable improves the navigation experience for screen reader users. [Learn how to make links accessible].

Your first network request is the most important. Reduce its latency by avoiding redirects, ensuring a fast server response, and enabling text compression.

Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this. [Learn how to reduce Javascript execution time].

Third party code can significantly impact load performance. [Reduce and defer loading of third party code] to prioritize your page's content.

This is the largest contentful element painted within the viewport. [Learn more about the Largest Contentful Paint element]

Image formats like WebP and AVIF often provide better compression than PNG or JPEG, which means faster downloads and less data consumption. [Learn more about modern image formats].

Third-party code can significantly impact load performance. Limit the number of redundant third-party providers and try to load third-party code after your page has primarily finished loading. [Learn how to minimize third-party impact].

Deprecated APIs will eventually be removed from the browser. [Learn more about deprecated APIs].

Search engines may use `href` attributes on links to crawl websites. Ensure that the `href` attribute of anchor elements links to an appropriate destination, so more pages of the site can be discovered. [Learn how to make links crawlable]

Reduce unused rules from stylesheets and defer CSS not used for above-the-fold content to decrease bytes consumed by network activity. [Learn how to reduce unused CSS].

The maximum potential First Input Delay that your users could experience is the duration of the longest task. [Learn more about the Maximum Potential First Input Delay metric].

Descriptive link text helps search engines understand your content. [Learn how to make links more accessible].

If your robots.txt file is malformed, crawlers may not be able to understand how you want your website to be crawled or indexed. [Learn more about robots.txt].

If the LCP element is dynamically added to the page, you should preload the image in order to improve LCP. [Learn more about preloading LCP elements].

Speed Index shows how quickly the contents of a page are visibly populated. [Learn more about the Speed Index metric].

Screen readers cannot translate non-text content. Adding alternate text to `