Commentcamarche.net CCM - Comment Ça Marche - Communauté informatique
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commentcamarche.net Mobile Performance
28/100
These metrics represent real-world Chrome users experience viewing commentcamarche.net 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
First Input Delay
Largest Contentful Paint
Cumulative Layout Shift
First Contentful Paint
Metrics
Total Blocking Time2/100 1,910 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds. Learn more.
Time to Interactive13/100 13.0 s
Time to interactive is the amount of time it takes for the page to become fully interactive. Learn more.
Speed Index24/100 7.8 s
Speed Index shows how quickly the contents of a page are visibly populated. Learn more.
Largest Contentful Paint38/100 4.5 s
Largest Contentful Paint marks the time at which the largest text or image is painted. Learn More
First Contentful Paint50/100 4.0 s
First Contentful Paint marks the time at which the first text or image is painted. Learn more.
Cumulative Layout Shift100/100 0
Cumulative Layout Shift measures the movement of visible elements within the viewport. Learn more.
Should Fix (18)
Opportunities
These suggestions can help your page load faster. They don't directly affect the Performance score.
Remove unused JavaScript
Potential savings of 358 KiB
2,180 ms
Avoid multiple page redirects
Potential savings of 1,260 ms
1,260 ms
Remove unused CSS
Potential savings of 17 KiB
300 ms
Eliminate render-blocking resources
Potential savings of 300 ms
300 ms
Enable text compression
Potential savings of 12 KiB
200 ms
Reduce initial server response time
Root document took 800 ms
195 ms
Defer offscreen images
Potential savings of 38 KiB
150 ms
Diagnostics
More information about the performance of your application. These numbers don't directly affect the Performance score.
Avoid `document.write()`
Reduce the impact of third-party code
Third-party code blocked the main thread for 410 ms
Minimize main-thread work
5.9 s
Serve static assets with an efficient cache policy
21 resources found
Reduce JavaScript execution time
3.7 s
Avoid an excessive DOM size
1,023 elements
Largest Contentful Paint element
1 element found
Avoid chaining critical requests
9 chains found
Avoid long main-thread tasks
20 long tasks found
Keep request counts low and transfer sizes small
87 requests • 1,120 KiB
User Timing marks and measures
253 user timings
Passed Audits (11)
Use video formats for animated content
Efficiently encode images
Minify CSS
Minify JavaScript
Properly size images
Uses passive listeners to improve scrolling performance
Preconnect to required origins
Avoids enormous network payloads
Total size was 1,120 KiB
Serve images in next-gen formats
All text remains visible during webfont loads
Preload key requests
commentcamarche.net Mobile SEO
82/100
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 (3)
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
51% appropriately sized tap targets
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Document does not have a meta description
Image elements do not have `[alt]` attributes
Passed Audits (11)
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
Page isn’t blocked from indexing
Links have descriptive text
Document has a valid `rel=canonical`
robots.txt is valid
Document uses legible font sizes
99.53% legible text
Document avoids plugins
Page has successful HTTP status code
Document has a valid `hreflang`
Links are crawlable
Document has a `<title>` element
commentcamarche.net Mobile Best Practices
62/100
These checks highlight opportunities to improve the overall code health of commentcamarche.net 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 (5)
General
Browser errors were logged to the console
Trust and Safety
Includes front-end JavaScript libraries with known security vulnerabilities
3 vulnerabilities detected
Links to cross-origin destinations are unsafe
Does not use HTTPS
2 insecure requests found
User Experience
Serves images with low resolution
Passed Audits (9)
Avoids deprecated APIs
Page has the HTML doctype
Avoids requesting the notification permission on page load
Allows users to paste into password fields
Avoids requesting the geolocation permission on page load
Properly defines charset
Detected JavaScript libraries
Avoids Application Cache
Displays images with correct aspect ratio
commentcamarche.net 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
Fast and reliable
`start_url` does not respond with a 200 when offline
Page load is not fast enough on mobile networks
Interactive at 13.0 s
Current page does not respond with a 200 when offline
Installable
Does not register a service worker that controls page and `start_url`
Web app manifest does not meet the installability requirements
Does not use HTTPS
2 insecure requests found
Passed Audits (6)
Contains some content when JavaScript is not available
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
Provides a valid `apple-touch-icon`
Content is sized correctly for the viewport
Sets a theme color for the address bar.
Redirects HTTP traffic to HTTPS
commentcamarche.net Mobile Accessibility
72/100
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)
Navigation
These are opportunities to improve keyboard navigation in your application.
Heading elements are not in a sequentially-descending order
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.
Links do not have a discernible name
Buttons do not have an accessible name
Image elements do not have `[alt]` attributes
`<frame>` or `<iframe>` elements do not have a title
Contrast
These are opportunities to improve the legibility of your content.
Background and foreground colors do not have a sufficient contrast ratio.
Passed Audits (13)
`[role]`s are contained by their required parent element
List items (`<li>`) are contained within `<ul>` or `<ol>` parent elements
Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
The page contains a heading, skip link, or landmark region
`<html>` element has a valid value for its `[lang]` attribute
`<html>` element has a `[lang]` attribute
`[aria-hidden="true"]` elements do not contain focusable descendents
`[role]` values are valid
`[role]`s have all required `[aria-*]` attributes
`[aria-hidden="true"]` is not present on the document `<body>`
Document has a `<title>` element
Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
Mobile Usability
97/100
These checks validate how easily a visitor can use commentcamarche.net 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 commentcamarche.net 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 (7)
Eliminate render-blocking JavaScript and CSS in above-the-fold content
Avoid landing page redirects
Leverage browser caching
Prioritize visible content
Enable compression
Reduce server response time
Optimize images
Passed Audits (3)
Minify CSS
Minify HTML
Minify JavaScript
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