4chan.org 4chan
4chan is a simple image-based bulletin board where anyone can post comments and share images anonymously.
4chan.org Mobile Performance
94/100
These metrics represent real-world Chrome users experience viewing 4chan.org 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
First Contentful Paint
Cumulative Layout Shift
Largest Contentful Paint
Metrics
Largest Contentful Paint79/100 3.0 s
Largest Contentful Paint marks the time at which the largest text or image is painted. Learn More
First Contentful Paint96/100 1.9 s
First Contentful Paint marks the time at which the first text or image is painted. Learn more.
Time to Interactive97/100 2.8 s
Time to interactive is the amount of time it takes for the page to become fully interactive. Learn more.
Total Blocking Time100/100 0 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds. Learn more.
Cumulative Layout Shift100/100 0
Cumulative Layout Shift measures the movement of visible elements within the viewport. Learn more.
Speed Index100/100 1.9 s
Speed Index shows how quickly the contents of a page are visibly populated. Learn more.
Should Fix (5)
Opportunities
These suggestions can help your page load faster. They don't directly affect the Performance score.
Eliminate render-blocking resources
Potential savings of 640 ms
644 ms
Diagnostics
More information about the performance of your application. These numbers don't directly affect the Performance score.
Largest Contentful Paint element
1 element found
Avoid long main-thread tasks
2 long tasks found
Keep request counts low and transfer sizes small
17 requests • 153 KiB
Avoid chaining critical requests
2 chains found
Passed Audits (23)
Uses passive listeners to improve scrolling performance
Remove unused JavaScript
Minimize third-party usage
Third-party code blocked the main thread for 0 ms
Minimizes main-thread work
0.5 s
Minify CSS
Enable text compression
Defer offscreen images
Avoids `document.write()`
Remove unused CSS
Preconnect to required origins
Avoids an excessive DOM size
291 elements
All text remains visible during webfont loads
Minify JavaScript
Avoid multiple page redirects
Potential savings of 630 ms
Properly size images
Initial server response time was short
Root document took 250 ms
Preload key requests
Avoids enormous network payloads
Total size was 153 KiB
Uses efficient cache policy on static assets
1 resource found
JavaScript execution time
0.1 s
Serve images in next-gen formats
Efficiently encode images
Use video formats for animated content
4chan.org Mobile SEO
94/100
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)
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
18% appropriately sized tap targets
Passed Audits (12)
Page has successful HTTP status code
Document uses legible font sizes
95.11% legible text
Image elements have `[alt]` attributes
Links have descriptive text
Document has a meta description
Page isn’t blocked from indexing
Document has a valid `hreflang`
Document avoids plugins
Links are crawlable
robots.txt is valid
Document has a `<title>` element
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
4chan.org Mobile Best Practices
77/100
These checks highlight opportunities to improve the overall code health of 4chan.org 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
General
Browser errors were logged to the console
Browser Compatibility
Page lacks the HTML doctype, thus triggering quirks-mode
Passed Audits (11)
Avoids front-end JavaScript libraries with known security vulnerabilities
Avoids requesting the geolocation permission on page load
Serves images with appropriate resolution
Displays images with correct aspect ratio
Avoids deprecated APIs
Allows users to paste into password fields
Avoids Application Cache
Properly defines charset
Detected JavaScript libraries
Links to cross-origin destinations are safe
Avoids requesting the notification permission on page load
4chan.org Mobile Progressive Web App
50/100
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)
Fast and reliable
Current page does not respond with a 200 when offline
`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`
PWA Optimized
Is not configured for a custom splash screen
Does not set a theme color for the address bar.
Manifest doesn't have a maskable icon
Passed Audits (6)
Contains some content when JavaScript is not available
Page load is fast enough on mobile networks
Redirects HTTP traffic to HTTPS
Provides a valid `apple-touch-icon`
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
Content is sized correctly for the viewport
4chan.org Mobile Accessibility
89/100
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 (2)
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
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
Passed Audits (9)
Image elements have `[alt]` attributes
`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
Heading elements appear in a sequentially-descending order
The page contains a heading, skip link, or landmark region
List items (`<li>`) are contained within `<ul>` or `<ol>` parent elements
Background and foreground colors have a sufficient contrast ratio
Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
Document has a `<title>` element
`[aria-hidden="true"]` is not present on the document `<body>`
Mobile Usability
85/100
These checks validate how easily a visitor can use 4chan.org 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 (2)
Size tap targets appropriately
Size content to viewport
Passed Audits (4)
Avoid app install interstitials that hide content
Avoid plugins
Configure the viewport
Use legible font sizes
Mobile Speed
78/100
These checks analyze the performance of 4chan.org 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
Enable compression
Minify JavaScript
Optimize images
Passed Audits (5)
Avoid landing page redirects
Reduce server response time
Minify CSS
Minify HTML
Prioritize visible content
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