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chsi.com.cn Mobile Performance
83/100
These metrics represent real-world Chrome users experience viewing chsi.com.cn 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 Paint63/100 3.5 s
Largest Contentful Paint marks the time at which the largest text or image is painted. Learn More
Speed Index83/100 3.9 s
Speed Index shows how quickly the contents of a page are visibly populated. Learn more.
Time to Interactive88/100 4.0 s
Time to interactive is the amount of time it takes for the page to become fully interactive. Learn more.
Total Blocking Time89/100 300 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds. 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.
Cumulative Layout Shift100/100 0
Cumulative Layout Shift measures the movement of visible elements within the viewport. Learn more.
Should Fix (10)
Opportunities
These suggestions can help your page load faster. They don't directly affect the Performance score.
Reduce initial server response time
Root document took 780 ms
177 ms
Serve images in next-gen formats
Potential savings of 63 KiB
150 ms
Diagnostics
More information about the performance of your application. These numbers don't directly affect the Performance score.
Avoid `document.write()`
Does not use passive listeners to improve scrolling performance
Serve static assets with an efficient cache policy
20 resources found
Minimizes main-thread work
2.0 s
Keep request counts low and transfer sizes small
28 requests • 283 KiB
Largest Contentful Paint element
1 element found
Avoid long main-thread tasks
6 long tasks found
Avoid chaining critical requests
4 chains found
Passed Audits (18)
Efficiently encode images
Potential savings of 28 KiB
Avoids enormous network payloads
Total size was 283 KiB
Preconnect to required origins
Remove unused CSS
Remove unused JavaScript
Potential savings of 24 KiB
Preload key requests
Defer offscreen images
Potential savings of 22 KiB
Enable text compression
Potential savings of 26 KiB
Minimize third-party usage
Third-party code blocked the main thread for 70 ms
Avoids an excessive DOM size
422 elements
Avoid multiple page redirects
Potential savings of 630 ms
All text remains visible during webfont loads
Eliminate render-blocking resources
Potential savings of 0 ms
Minify JavaScript
Use video formats for animated content
Minify CSS
JavaScript execution time
0.4 s
Properly size images
chsi.com.cn Mobile SEO
69/100
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 (4)
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
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.
Document doesn't use legible font sizes
Tap targets are not sized appropriately
Does not have a `<meta name="viewport">` tag with `width` or `initial-scale`
Passed Audits (9)
Page has successful HTTP status code
Document avoids plugins
Document has a valid `hreflang`
Page isn’t blocked from indexing
Links are crawlable
Links have descriptive text
Document has a `<title>` element
robots.txt is valid
Document has a meta description
chsi.com.cn Mobile Best Practices
77/100
These checks highlight opportunities to improve the overall code health of chsi.com.cn 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
User Experience
Serves images with low resolution
Passed Audits (11)
Avoids requesting the notification permission on page load
Page has the HTML doctype
Avoids Application Cache
Detected JavaScript libraries
Avoids deprecated APIs
Avoids front-end JavaScript libraries with known security vulnerabilities
No browser errors logged to the console
Avoids requesting the geolocation permission on page load
Allows users to paste into password fields
Displays images with correct aspect ratio
Properly defines charset
chsi.com.cn Mobile Progressive Web App
39/100
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 (10)
Installable
Does not register a service worker that controls page and `start_url`
Does not use HTTPS
1 insecure request found
Web app manifest does not meet the installability requirements
PWA Optimized
Does not set a theme color for the address bar.
Does not have a `<meta name="viewport">` tag with `width` or `initial-scale`
Manifest doesn't have a maskable icon
Content is not sized correctly for the viewport
Is not configured for a custom splash screen
Fast and reliable
Current page does not respond with a 200 when offline
`start_url` does not respond with a 200 when offline
Passed Audits (4)
Redirects HTTP traffic to HTTPS
Provides a valid `apple-touch-icon`
Contains some content when JavaScript is not available
Page load is fast enough on mobile networks
chsi.com.cn Mobile Accessibility
51/100
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.
Links do not have a discernible name
Form elements do not have associated labels
Image elements do not have `[alt]` attributes
`<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.
Passed Audits (9)
Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
List items (`<li>`) are contained within `<ul>` or `<ol>` parent elements
`[id]` attributes on active, focusable elements are unique
Presentational `<table>` elements avoid using `<th>`, `<caption>` or the `[summary]` attribute.
The page contains a heading, skip link, or landmark region
`[aria-hidden="true"]` is not present on the document `<body>`
Document has a `<title>` element
Heading elements appear in a sequentially-descending order
Mobile Usability
60/100
These checks validate how easily a visitor can use chsi.com.cn 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 (4)
Use legible font sizes
Size tap targets appropriately
Configure the viewport
Size content to viewport
Passed Audits (2)
Avoid app install interstitials that hide content
Avoid plugins
Mobile Speed
79/100
These checks analyze the performance of chsi.com.cn 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 (3)
Eliminate render-blocking JavaScript and CSS in above-the-fold content
Leverage browser caching
Minify JavaScript
Passed Audits (7)
Avoid landing page redirects
Enable compression
Reduce server response time
Minify CSS
Minify HTML
Optimize images
Prioritize visible content
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