Umich.edu University of Michigan
A top-ranked public university, the University of Michigan has a tradition of excellence in research, learning and teaching, sports and the arts, and ...
umich.edu Desktop Performance
57/100
These metrics represent real-world Chrome users experience viewing umich.edu web page. 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
First Contentful Paint
First Input Delay
Cumulative Layout Shift
Metrics
Cumulative Layout Shift3/100 1
Cumulative Layout Shift measures the movement of visible elements within the viewport. Learn more.
Largest Contentful Paint16/100 4.2 s
Largest Contentful Paint marks the time at which the largest text or image is painted. Learn More
First Contentful Paint50/100 1.6 s
First Contentful Paint marks the time at which the first text or image is painted. Learn more.
Time to Interactive62/100 3.9 s
Time to interactive is the amount of time it takes for the page to become fully interactive. Learn more.
Speed Index72/100 1.8 s
Speed Index shows how quickly the contents of a page are visibly populated. Learn more.
Total Blocking Time100/100 20 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds. Learn more.
Should Fix (11)
Opportunities
These suggestions can help your page load faster. They don't directly affect the Performance score.
Eliminate render-blocking resources
Potential savings of 490 ms
490 ms
Diagnostics
More information about the performance of your application. These numbers don't directly affect the Performance score.
Does not use passive listeners to improve scrolling performance
Avoid `document.write()`
Ensure text remains visible during webfont load
Serve static assets with an efficient cache policy
107 resources found
Avoid enormous network payloads
Total size was 4,265 KiB
Keep request counts low and transfer sizes small
149 requests • 4,265 KiB
Avoid chaining critical requests
32 chains found
Avoid large layout shifts
Largest Contentful Paint element
Avoid long main-thread tasks
4 long tasks found
Passed Audits (18)
Preconnect to required origins
Properly size images
Potential savings of 17 KiB
Initial server response time was short
Root document took 100 ms
Defer offscreen images
JavaScript execution time
0.6 s
Preload key requests
Avoids an excessive DOM size
621 elements
Efficiently encode images
Minify JavaScript
Minify CSS
Use video formats for animated content
Serve images in next-gen formats
Potential savings of 75 KiB
Minimizes main-thread work
1.5 s
Minimize third-party usage
Third-party code blocked the main thread for 0 ms
Remove unused JavaScript
Avoid multiple page redirects
Potential savings of 2,150 ms
Remove unused CSS
Potential savings of 15 KiB
Enable text compression
umich.edu Desktop SEO
100/100
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.
Passed Audits (11)
Document has a valid `hreflang`
Document avoids plugins
Links have descriptive text
Document has a meta description
Document has a `<title>` element
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
robots.txt is valid
Page isn’t blocked from indexing
Image elements have `[alt]` attributes
Page has successful HTTP status code
Links are crawlable
umich.edu Desktop Best Practices
0/100
These checks highlight opportunities to improve the overall code health of umich.edu 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 (4)
General
Browser errors were logged to the console
Trust and Safety
Does not use HTTPS
1 insecure request found
Includes front-end JavaScript libraries with known security vulnerabilities
3 vulnerabilities detected
Browser Compatibility
Properly defines charset
Passed Audits (10)
Allows users to paste into password fields
Avoids requesting the geolocation permission on page load
Page has the HTML doctype
Avoids deprecated APIs
Avoids requesting the notification permission on page load
Avoids Application Cache
Links to cross-origin destinations are safe
Detected JavaScript libraries
Serves images with appropriate resolution
Displays images with correct aspect ratio
umich.edu Desktop Progressive Web App
22/100
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 (9)
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
Fast and reliable
`start_url` does not respond with a 200 when offline
Page load is not fast enough on mobile networks
Interactive on simulated mobile network at 13.5 s
Current page does not respond with a 200 when offline
Installable
Does not use HTTPS
1 insecure request found
Does not register a service worker that controls page and `start_url`
Web app manifest does not meet the installability requirements
Passed Audits (4)
Redirects HTTP traffic to HTTPS
Provides a valid `apple-touch-icon`
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
Contains some content when JavaScript is not available
umich.edu Desktop Accessibility
93/100
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
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)
ARIA IDs are unique
Document has a `<title>` element
The page contains a heading, skip link, or landmark region
Form elements have associated labels
Buttons have an accessible name
`<html>` element has a valid value for its `[lang]` attribute
`[aria-hidden="true"]` is not present on the document `<body>`
Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
Image elements have `[alt]` attributes
`<html>` element has a `[lang]` attribute
List items (`<li>`) are contained within `<ul>` or `<ol>` parent elements
Heading elements appear in a sequentially-descending order
Desktop Speed
91/100
These checks analyze the performance of umich.edu on desktop 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
Optimize images
Leverage browser caching
Minify HTML
Passed Audits (6)
Avoid landing page redirects
Enable compression
Reduce server response time
Minify CSS
Minify JavaScript
Prioritize visible content
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