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heise.de Mobile Performance
16/100
These metrics represent real-world Chrome users experience viewing heise.de on mobile devices. 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
Largest Contentful Paint
First Contentful Paint
First Input Delay
Cumulative Layout Shift
Metrics
Total Blocking Time0/100 6,750 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds. Learn more.
Time to Interactive1/100 22.5 s
Time to interactive is the amount of time it takes for the page to become fully interactive. Learn more.
Speed Index1/100 15.3 s
Speed Index shows how quickly the contents of a page are visibly populated. Learn more.
Largest Contentful Paint3/100 8.1 s
Largest Contentful Paint marks the time at which the largest text or image is painted. Learn More
First Contentful Paint69/100 3.2 s
First Contentful Paint marks the time at which the first text or image is painted. Learn more.
Cumulative Layout Shift98/100 0.053
Cumulative Layout Shift measures the movement of visible elements within the viewport. Learn more.
Should Fix (21)
Opportunities
These suggestions can help your page load faster. They don't directly affect the Performance score.
Remove unused JavaScript
Potential savings of 365 KiB
3,590 ms
Serve images in next-gen formats
Potential savings of 507 KiB
2,100 ms
Efficiently encode images
Potential savings of 370 KiB
1,200 ms
Defer offscreen images
Potential savings of 253 KiB
750 ms
Eliminate render-blocking resources
Potential savings of 660 ms
655 ms
Remove unused CSS
Potential savings of 80 KiB
300 ms
Reduce initial server response time
Root document took 850 ms
254 ms
Diagnostics
More information about the performance of your application. These numbers don't directly affect the Performance score.
Minimize main-thread work
25.1 s
Avoid `document.write()`
Reduce the impact of third-party code
Third-party code blocked the main thread for 1,780 ms
Ensure text remains visible during webfont load
Reduce JavaScript execution time
16.3 s
Avoid an excessive DOM size
3,391 elements
Serve static assets with an efficient cache policy
56 resources found
Avoid enormous network payloads
Total size was 2,717 KiB
Avoid long main-thread tasks
20 long tasks found
Avoid large layout shifts
2 elements found
Keep request counts low and transfer sizes small
160 requests • 2,717 KiB
Avoid chaining critical requests
2 chains found
Largest Contentful Paint element
1 element found
User Timing marks and measures
59 user timings
Passed Audits (9)
Enable text compression
Preload key requests
Avoid multiple page redirects
Potential savings of 630 ms
Preconnect to required origins
Properly size images
Minify CSS
Minify JavaScript
Potential savings of 5 KiB
Use video formats for animated content
Uses passive listeners to improve scrolling performance
heise.de Mobile 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 (2)
Mobile Friendly
Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. Learn more.
Tap targets are not sized appropriately
95% appropriately sized tap targets
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Links are not crawlable
Passed Audits (11)
Document has a meta description
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
Image elements have `[alt]` attributes
Page has successful HTTP status code
Document has a `<title>` element
Document has a valid `hreflang`
robots.txt is valid
Links have descriptive text
Document avoids plugins
Document uses legible font sizes
100% legible text
Page isn’t blocked from indexing
heise.de Mobile Best Practices
77/100
These checks highlight opportunities to improve the overall code health of heise.de mobile 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 (3)
Trust and Safety
Does not use HTTPS
1 insecure request found
Links to cross-origin destinations are unsafe
General
Browser errors were logged to the console
Passed Audits (11)
Avoids requesting the geolocation permission on page load
Avoids Application Cache
Properly defines charset
Displays images with correct aspect ratio
Avoids deprecated APIs
Serves images with appropriate resolution
Avoids requesting the notification permission on page load
Avoids front-end JavaScript libraries with known security vulnerabilities
Page has the HTML doctype
Allows users to paste into password fields
Detected JavaScript libraries
heise.de Mobile Progressive Web App
29/100
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 (8)
PWA Optimized
Manifest doesn't have a maskable icon
Is not configured for a custom splash screen
Installable
Does not use HTTPS
1 insecure request found
Does not register a service worker that controls page and `start_url`
Web app manifest does not meet the installability requirements
Fast and reliable
`start_url` does not respond with a 200 when offline
Page load is not fast enough on mobile networks
Interactive at 22.5 s
Current page does not respond with a 200 when offline
Passed Audits (6)
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
Contains some content when JavaScript is not available
Redirects HTTP traffic to HTTPS
Sets a theme color for the address bar.
Content is sized correctly for the viewport
Provides a valid `apple-touch-icon`
heise.de Mobile Accessibility
77/100
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.
Buttons do not have an accessible name
Links do not have a discernible name
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
`[aria-*]` attributes are not valid or misspelled
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 (19)
`<frame>` or `<iframe>` elements have a title
Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
`[id]` attributes on active, focusable elements are unique
Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
List items (`<li>`) are contained within `<ul>` or `<ol>` parent elements
Image elements have `[alt]` attributes
`[aria-hidden="true"]` is not present on the document `<body>`
`[role]`s are contained by their required parent element
Document has a `<title>` element
Form elements have associated labels
`[role]` values are valid
`[aria-*]` attributes match their roles
`[aria-*]` attributes have valid values
`<html>` element has a valid value for its `[lang]` attribute
`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
`[role]`s have all required `[aria-*]` attributes
The page contains a heading, skip link, or landmark region
No element has a `[tabindex]` value greater than 0
`<html>` element has a `[lang]` attribute
Mobile Usability
99/100
These checks validate how easily a visitor can use heise.de on a mobile device. Test results include a list of any mobile usability problems. Mobile usability problems are issues that can affect a user that visits the page on a mobile (small screen) device, including small font sizes (which are hard to read on a small screen).
Should Fix (1)
Size tap targets appropriately
Passed Audits (4)
Avoid plugins
Configure the viewport
Size content to viewport
Use legible font sizes
Mobile Speed
52/100
These checks analyze the performance of heise.de on mobile devices and return PageSpeed score and information on how to improve the load time. What makes a good Progressive Web App?
Should Fix (6)
Avoid landing page redirects
Eliminate render-blocking JavaScript and CSS in above-the-fold content
Leverage browser caching
Optimize images
Minify HTML
Minify JavaScript
Passed Audits (4)
Enable compression
Reduce server response time
Minify CSS
Prioritize visible content
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