Urjc.es Inicio - Universidad Rey Juan Carlos
Universidad Rey Juan Carlos de Madrid
urjc.es Desktop Performance
28/100
These metrics represent real-world Chrome users experience viewing urjc.es web page. Reports are focused on loading performance and other critical factors that most affect user experience. Follow our guide to track, optimize, and improve the quality of your web pages.
User Loading Experience
First Contentful Paint
First Input Delay
Cumulative Layout Shift
Largest Contentful Paint
Metrics
Speed Index0/100 8.4 s
Speed Index shows how quickly the contents of a page are visibly populated. Learn more.
Largest Contentful Paint0/100 11.5 s
Largest Contentful Paint marks the time at which the largest text or image is painted. Learn More
First Contentful Paint2/100 3.7 s
First Contentful Paint marks the time at which the first text or image is painted. Learn more.
Time to Interactive5/100 9.9 s
Time to interactive is the amount of time it takes for the page to become fully interactive. Learn more.
Cumulative Layout Shift53/100 0.239
Cumulative Layout Shift measures the movement of visible elements within the viewport. Learn more.
Total Blocking Time99/100 70 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds. Learn more.
Should Fix (23)
Opportunities
These suggestions can help your page load faster. They don't directly affect the Performance score.
Properly size images
Potential savings of 3,886 KiB
2,920 ms
Eliminate render-blocking resources
Potential savings of 2,850 ms
2,850 ms
Serve images in next-gen formats
Potential savings of 3,363 KiB
2,640 ms
Efficiently encode images
Potential savings of 2,479 KiB
2,000 ms
Enable text compression
Potential savings of 1,323 KiB
1,760 ms
Remove unused CSS
Potential savings of 643 KiB
1,120 ms
Reduce initial server response time
Root document took 1,550 ms
947 ms
Defer offscreen images
Potential savings of 1,365 KiB
880 ms
Remove unused JavaScript
Potential savings of 851 KiB
760 ms
Minify JavaScript
Potential savings of 93 KiB
120 ms
Minify CSS
Potential savings of 67 KiB
80 ms
Diagnostics
More information about the performance of your application. These numbers don't directly affect the Performance score.
Does not use passive listeners to improve scrolling performance
Ensure text remains visible during webfont load
Serve static assets with an efficient cache policy
131 resources found
Avoid enormous network payloads
Total size was 8,283 KiB
Avoid an excessive DOM size
1,253 elements
Minimize main-thread work
2.2 s
Avoid long main-thread tasks
6 long tasks found
Avoid large layout shifts
4 elements found
Keep request counts low and transfer sizes small
176 requests • 8,283 KiB
Avoid chaining critical requests
56 chains found
Largest Contentful Paint element
1 element found
User Timing marks and measures
4 user timings
Passed Audits (7)
Preconnect to required origins
Preload key requests
JavaScript execution time
0.8 s
Avoids `document.write()`
Minimize third-party usage
Third-party code blocked the main thread for 140 ms
Use video formats for animated content
Avoid multiple page redirects
Potential savings of 190 ms
urjc.es Desktop SEO
91/100
These checks ensure that your page is optimized for search engine results ranking. There are additional factors Lighthouse does not check that may affect your search ranking. Learn more. Run these additional validators on your site to check additional SEO best practices.
Should Fix (1)
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Links do not have descriptive text
2 links found
Passed Audits (10)
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
Image elements have `[alt]` attributes
Document has a `<title>` element
Links are crawlable
Page has successful HTTP status code
Document avoids plugins
Document has a valid `hreflang`
Document has a meta description
Page isn’t blocked from indexing
robots.txt is valid
urjc.es Desktop Best Practices
62/100
These checks highlight opportunities to improve the overall code health of urjc.es page. Current recommendations will help to make your page fast and secure, to create a good user experience and to avoid deprecated technologies.
Should Fix (5)
General
Browser errors were logged to the console
User Experience
Displays images with incorrect aspect ratio
Trust and Safety
Does not use HTTPS
1 insecure request found
Links to cross-origin destinations are unsafe
Includes front-end JavaScript libraries with known security vulnerabilities
4 vulnerabilities detected
Passed Audits (9)
Page has the HTML doctype
Avoids Application Cache
Detected JavaScript libraries
Properly defines charset
Avoids requesting the notification permission on page load
Avoids requesting the geolocation permission on page load
Serves images with appropriate resolution
Allows users to paste into password fields
Avoids deprecated APIs
urjc.es Desktop Progressive Web App
19/100
These checks validate the aspects of a Progressive Web App. Learn more. These checks are required by the baseline PWA Checklist but are not automatically checked by Lighthouse. They do not affect your score but it's important that you verify them manually.
Should Fix (10)
PWA Optimized
Is not configured for a custom splash screen
Manifest doesn't have a maskable icon
Does not provide a valid `apple-touch-icon`
Does not set a theme color for the address bar.
Fast and reliable
Current page does not respond with a 200 when offline
Page load is not fast enough on mobile networks
Interactive on simulated mobile network at 42.9 s
`start_url` does not respond with a 200 when offline
Installable
Web app manifest does not meet the installability requirements
Does not use HTTPS
1 insecure request found
Does not register a service worker that controls page and `start_url`
Passed Audits (3)
Contains some content when JavaScript is not available
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
Redirects HTTP traffic to HTTPS
urjc.es Desktop Accessibility
66/100
These checks highlight opportunities to improve the accessibility of your web app. Only a subset of accessibility issues can be automatically detected so manual testing is also encouraged. These items address areas which an automated testing tool cannot cover. Learn more in our guide on conducting an accessibility review.
Should Fix (6)
Names and labels
These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.
`<frame>` or `<iframe>` elements do not have a title
Links do not have a discernible name
Form elements do not have associated labels
ARIA
These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.
ARIA IDs are not unique
Navigation
These are opportunities to improve keyboard navigation in your application.
Heading elements are not in a sequentially-descending order
Contrast
These are opportunities to improve the legibility of your content.
Background and foreground colors do not have a sufficient contrast ratio.
Passed Audits (11)
`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
Image elements have `[alt]` attributes
`<html>` element has a `[lang]` attribute
`[aria-hidden="true"]` is not present on the document `<body>`
Document has a `<title>` element
List items (`<li>`) are contained within `<ul>` or `<ol>` parent elements
Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
`<html>` element has a valid value for its `[lang]` attribute
`[id]` attributes on active, focusable elements are unique
The page contains a heading, skip link, or landmark region
Buttons have an accessible name
Desktop Speed
31/100
These checks analyze the performance of urjc.es on desktop devices and return PageSpeed score and information on how to improve the load time. What makes a good Progressive Web App?
Should Fix (7)
Optimize images
Enable compression
Eliminate render-blocking JavaScript and CSS in above-the-fold content
Minify JavaScript
Minify CSS
Leverage browser caching
Minify HTML
Passed Audits (3)
Avoid landing page redirects
Reduce server response time
Prioritize visible content
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