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d3.ru Mobile Performance
17/100
These metrics represent real-world Chrome users experience viewing d3.ru 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
Cumulative Layout Shift
First Contentful Paint
First Input Delay
Metrics
Total Blocking Time0/100 2,670 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds. Learn more.
Speed Index3/100 12.7 s
Speed Index shows how quickly the contents of a page are visibly populated. Learn more.
Time to Interactive4/100 18.3 s
Time to interactive is the amount of time it takes for the page to become fully interactive. Learn more.
Largest Contentful Paint8/100 6.7 s
Largest Contentful Paint marks the time at which the largest text or image is painted. Learn More
Cumulative Layout Shift31/100 0.356
Cumulative Layout Shift measures the movement of visible elements within the viewport. Learn more.
First Contentful Paint80/100 2.8 s
First Contentful Paint marks the time at which the first text or image is painted. Learn more.
Should Fix (20)
Opportunities
These suggestions can help your page load faster. They don't directly affect the Performance score.
Defer offscreen images
Potential savings of 2,349 KB
8,280 ms
Serve images in next-gen formats
Potential savings of 1,408 KB
7,230 ms
Remove unused JavaScript
Potential savings of 321 KB
2,930 ms
Efficiently encode images
Potential savings of 85 KB
450 ms
Properly size images
Potential savings of 55 KB
300 ms
Eliminate render-blocking resources
Potential savings of 180 ms
180 ms
Diagnostics
More information about the performance of your application. These numbers don't directly affect the Performance score.
Avoid `document.write()`
Ensure text remains visible during webfont load
Serve static assets with an efficient cache policy
47 resources found
Reduce the impact of third-party code
Third-party code blocked the main thread for 1,770 ms
Does not use passive listeners to improve scrolling performance
Minimize main-thread work
11.9 s
Reduce JavaScript execution time
7.8 s
Avoid an excessive DOM size
1,923 elements
Avoid enormous network payloads
Total size was 4,014 KB
Avoid large layout shifts
5 elements found
User Timing marks and measures
41 user timings
Largest Contentful Paint element
1 element found
Keep request counts low and transfer sizes small
156 requests • 4,014 KB
Avoid chaining critical requests
4 chains found
Passed Audits (9)
Minify JavaScript
Preconnect to required origins
Avoid multiple page redirects
Potential savings of 630 ms
Minify CSS
Remove unused CSS
Potential savings of 44 KB
Enable text compression
Potential savings of 2 KB
Use video formats for animated content
Initial server response time was short
Root document took 480 ms
Preload key requests
d3.ru Mobile SEO
88/100
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
68% 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
Passed Audits (10)
Document uses legible font sizes
99.05% legible text
Page has successful HTTP status code
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
Document has a valid `hreflang`
Document avoids plugins
Document has a `<title>` element
Links have descriptive text
robots.txt is valid
Page isn’t blocked from indexing
Image elements have `[alt]` attributes
d3.ru Mobile Best Practices
77/100
These checks highlight opportunities to improve the overall code health of d3.ru 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)
Page has the HTML doctype
Avoids requesting the notification permission on page load
Allows users to paste into password fields
Avoids front-end JavaScript libraries with known security vulnerabilities
Displays images with correct aspect ratio
Properly defines charset
Avoids deprecated APIs
Avoids Application Cache
Detected JavaScript libraries
Avoids requesting the geolocation permission on page load
Displays images with appropriate size
d3.ru Mobile Progressive Web App
18/100
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 (11)
PWA Optimized
Does not provide fallback content when JavaScript is not available
Does not provide a valid `apple-touch-icon`
Does not set a theme color for the address bar.
Manifest doesn't have a maskable icon
Is not configured for a custom splash screen
Fast and reliable
Page load is not fast enough on mobile networks
Interactive at 18.3 s
`start_url` does not respond with a 200 when offline
Current page does not respond with a 200 when offline
Installable
Does not use HTTPS
1 insecure request found
Web app manifest does not meet the installability requirements
Does not register a service worker that controls page and `start_url`
Passed Audits (3)
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
Redirects HTTP traffic to HTTPS
Content is sized correctly for the viewport
d3.ru Mobile Accessibility
73/100
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)
Tables and lists
These are opportunities to to improve the experience of reading tabular or list data using assistive technology, like a screen reader.
Lists do not contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
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
`<frame>` or `<iframe>` elements do not have a title
Internationalization and localization
These are opportunities to improve the interpretation of your content by users in different locales.
`<html>` element does not have a `[lang]` attribute
Contrast
These are opportunities to improve the legibility of your content.
Background and foreground colors do not have a sufficient contrast ratio.
Best practices
These items highlight common accessibility best practices.
`[user-scalable="no"]` is used in the `<meta name="viewport">` element or the `[maximum-scale]` attribute is less than 5.
Passed Audits (11)
No element has a `[tabindex]` value greater than 0
Heading elements appear in a sequentially-descending order
ARIA IDs are unique
`[lang]` attributes have a valid value
`[aria-hidden="true"]` is not present on the document `<body>`
The page contains a heading, skip link, or landmark region
`<video>` elements contain a `<track>` element with `[kind="description"]`
Document has a `<title>` element
`[id]` attributes on active, focusable elements are unique
Image elements have `[alt]` attributes
`<video>` elements contain a `<track>` element with `[kind="captions"]`
Mobile Usability
99/100
These checks validate how easily a visitor can use d3.ru 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
64/100
These checks analyze the performance of d3.ru 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 (5)
Eliminate render-blocking JavaScript and CSS in above-the-fold content
Leverage browser caching
Prioritize visible content
Optimize images
Enable compression
Passed Audits (5)
Avoid landing page redirects
Reduce server response time
Minify CSS
Minify HTML
Minify JavaScript
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