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dcard.tw Mobile Performance
14/100
These metrics represent real-world Chrome users experience viewing dcard.tw 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 Input Delay
First Contentful Paint
Metrics
Largest Contentful Paint4/100 7.6 s
Largest Contentful Paint marks the time at which the largest text or image is painted. Learn More
First Contentful Paint9/100 7.1 s
First Contentful Paint marks the time at which the first text or image is painted. Learn more.
Time to Interactive10/100 13.9 s
Time to interactive is the amount of time it takes for the page to become fully interactive. Learn more.
Speed Index11/100 9.7 s
Speed Index shows how quickly the contents of a page are visibly populated. Learn more.
Total Blocking Time15/100 1,090 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 0.002
Cumulative Layout Shift measures the movement of visible elements within the viewport. Learn more.
Should Fix (11)
Opportunities
These suggestions can help your page load faster. They don't directly affect the Performance score.
Remove unused JavaScript
Potential savings of 335 KiB
1,500 ms
Avoid multiple page redirects
Potential savings of 1,410 ms
1,410 ms
Diagnostics
More information about the performance of your application. These numbers don't directly affect the Performance score.
Minimize main-thread work
8.5 s
Reduce JavaScript execution time
3.7 s
Serve static assets with an efficient cache policy
4 resources found
Avoid large layout shifts
5 elements found
Avoid long main-thread tasks
18 long tasks found
Keep request counts low and transfer sizes small
110 requests • 1,316 KiB
User Timing marks and measures
4 user timings
Avoid chaining critical requests
4 chains found
Largest Contentful Paint element
1 element found
Passed Audits (19)
Use video formats for animated content
Avoids an excessive DOM size
532 elements
Preload key requests
Avoids `document.write()`
All text remains visible during webfont loads
Enable text compression
Defer offscreen images
Minify CSS
Minimize third-party usage
Third-party code blocked the main thread for 60 ms
Uses passive listeners to improve scrolling performance
Serve images in next-gen formats
Initial server response time was short
Root document took 560 ms
Properly size images
Potential savings of 36 KiB
Eliminate render-blocking resources
Preconnect to required origins
Minify JavaScript
Efficiently encode images
Avoids enormous network payloads
Total size was 1,316 KiB
Remove unused CSS
dcard.tw Mobile SEO
93/100
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.
Image elements do not have `[alt]` attributes
Passed Audits (13)
Document has a valid `rel=canonical`
Links are crawlable
Document has a meta description
Page isn’t blocked from indexing
Document uses legible font sizes
99.83% legible text
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
Links have descriptive text
robots.txt is valid
Tap targets are sized appropriately
100% appropriately sized tap targets
Document avoids plugins
Page has successful HTTP status code
Document has a `<title>` element
Document has a valid `hreflang`
dcard.tw Mobile Best Practices
85/100
These checks highlight opportunities to improve the overall code health of dcard.tw 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 (2)
Trust and Safety
Does not use HTTPS
1 insecure request found
General
Browser errors were logged to the console
Passed Audits (12)
Page has the HTML doctype
Links to cross-origin destinations are safe
Avoids front-end JavaScript libraries with known security vulnerabilities
Avoids Application Cache
Properly defines charset
Serves images with appropriate resolution
Allows users to paste into password fields
Avoids requesting the notification permission on page load
Displays images with correct aspect ratio
Detected JavaScript libraries
Avoids requesting the geolocation permission on page load
Avoids deprecated APIs
dcard.tw Mobile Progressive Web App
0/100
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 (7)
Fast and reliable
Page load is not fast enough on mobile networks
Interactive at 13.9 s
`start_url` does not respond with a 200 when offline
Current page does not respond with a 200 when offline
PWA Optimized
Manifest doesn't have a maskable icon
Contains some content when JavaScript is not available
Redirects HTTP traffic to HTTPS
Installable
Does not use HTTPS
1 insecure request found
Passed Audits (7)
Provides a valid `apple-touch-icon`
Content is sized correctly for the viewport
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
Configured for a custom splash screen
Registers a service worker that controls page and `start_url`
Web app manifest meets the installability requirements
Sets a theme color for the address bar.
dcard.tw Mobile Accessibility
90/100
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.
Image elements do not have `[alt]` attributes
Contrast
These are opportunities to improve the legibility of your content.
Background and foreground colors do not have a sufficient contrast ratio.
Passed Audits (16)
`<html>` element has a `[lang]` attribute
`[role]` values are valid
`[aria-*]` attributes match their roles
`[aria-*]` attributes have valid values
`<html>` element has a valid value for its `[lang]` attribute
Heading elements appear in a sequentially-descending order
`[role]`s have all required `[aria-*]` attributes
Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
Links have a discernible name
`[role]`s are contained by their required parent element
`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
The page contains a heading, skip link, or landmark region
Document has a `<title>` element
`[aria-*]` attributes are valid and not misspelled
Buttons have an accessible name
`[aria-hidden="true"]` is not present on the document `<body>`
Mobile Usability
100/100
These checks validate how easily a visitor can use dcard.tw 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).
Passed Audits (5)
Avoid plugins
Configure the viewport
Size content to viewport
Size tap targets appropriately
Use legible font sizes
Mobile Speed
71/100
These checks analyze the performance of dcard.tw 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 (4)
Eliminate render-blocking JavaScript and CSS in above-the-fold content
Leverage browser caching
Reduce server response time
Enable compression
Passed Audits (6)
Avoid landing page redirects
Minify CSS
Minify HTML
Minify JavaScript
Optimize images
Prioritize visible content
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