Utoronto.ca University of Toronto
The University of Toronto is a globally top-ranked public research university in Toronto, Ontario, Canada.
utoronto.ca Mobile Performance
36/100
These metrics represent real-world Chrome users experience viewing utoronto.ca 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
Cumulative Layout Shift
Largest Contentful Paint
First Contentful Paint
First Input Delay
Metrics
Largest Contentful Paint0/100 15.6 s
Largest Contentful Paint marks the time at which the largest text or image is painted. Learn More
Time to Interactive18/100 11.8 s
Time to interactive is the amount of time it takes for the page to become fully interactive. Learn more.
First Contentful Paint27/100 5.2 s
First Contentful Paint marks the time at which the first text or image is painted. Learn more.
Speed Index46/100 6.1 s
Speed Index shows how quickly the contents of a page are visibly populated. Learn more.
Total Blocking Time68/100 460 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.
Should Fix (16)
Opportunities
These suggestions can help your page load faster. They don't directly affect the Performance score.
Serve images in next-gen formats
Potential savings of 1,561 KiB
7,800 ms
Properly size images
Potential savings of 1,036 KiB
5,100 ms
Efficiently encode images
Potential savings of 766 KiB
3,900 ms
Eliminate render-blocking resources
Potential savings of 2,040 ms
2,040 ms
Remove unused CSS
Potential savings of 108 KiB
1,050 ms
Remove unused JavaScript
Potential savings of 55 KiB
600 ms
Minify JavaScript
Potential savings of 11 KiB
150 ms
Diagnostics
More information about the performance of your application. These numbers don't directly affect the Performance score.
Ensure text remains visible during webfont load
Serve static assets with an efficient cache policy
25 resources found
Avoid enormous network payloads
Total size was 3,426 KiB
Minimize main-thread work
2.8 s
JavaScript execution time
1.0 s
Largest Contentful Paint element
1 element found
Keep request counts low and transfer sizes small
52 requests • 3,426 KiB
Avoid chaining critical requests
26 chains found
Avoid long main-thread tasks
10 long tasks found
Passed Audits (12)
Uses passive listeners to improve scrolling performance
Defer offscreen images
Initial server response time was short
Root document took 70 ms
Minify CSS
Minimize third-party usage
Third-party code blocked the main thread for 160 ms
Use video formats for animated content
Avoids `document.write()`
Avoids an excessive DOM size
434 elements
Avoid multiple page redirects
Potential savings of 630 ms
Preconnect to required origins
Preload key requests
Enable text compression
utoronto.ca Mobile SEO
85/100
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)
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Links do not have descriptive text
1 link found
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Links are not crawlable
Passed Audits (11)
Document has a valid `hreflang`
Page has successful HTTP status code
robots.txt is valid
Document has a meta description
Page isn’t blocked from indexing
Document has a `<title>` element
Image elements have `[alt]` attributes
Document uses legible font sizes
100% legible text
Tap targets are sized appropriately
100% appropriately sized tap targets
Document avoids plugins
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
utoronto.ca Mobile Best Practices
85/100
These checks highlight opportunities to improve the overall code health of utoronto.ca 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
Includes front-end JavaScript libraries with known security vulnerabilities
5 vulnerabilities detected
Passed Audits (12)
Properly defines charset
Detected JavaScript libraries
Links to cross-origin destinations are safe
No browser errors logged to the console
Avoids deprecated APIs
Avoids Application Cache
Allows users to paste into password fields
Avoids requesting the notification permission on page load
Serves images with appropriate resolution
Page has the HTML doctype
Displays images with correct aspect ratio
Avoids requesting the geolocation permission on page load
utoronto.ca Mobile Progressive Web App
29/100
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
`start_url` does not respond with a 200 when offline
Page load is not fast enough on mobile networks
Interactive at 11.8 s
Current page does not respond with a 200 when offline
PWA Optimized
Manifest doesn't have a maskable icon
Is not configured for a custom splash screen
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
Passed Audits (6)
Contains some content when JavaScript is not available
Redirects HTTP traffic to HTTPS
Content is sized correctly for the viewport
Sets a theme color for the address bar.
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
Provides a valid `apple-touch-icon`
utoronto.ca Mobile Accessibility
88/100
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 (4)
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.
Buttons do not have an accessible name
Links do not have a discernible name
Navigation
These are opportunities to improve keyboard navigation in your application.
Heading elements are not in a sequentially-descending order
ARIA
These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.
`[aria-hidden="true"]` elements contain focusable descendents
Passed Audits (19)
`[role]`s are contained by their required parent element
The page contains a heading, skip link, or landmark region
`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
`[aria-*]` attributes are valid and not misspelled
List items (`<li>`) are contained within `<ul>` or `<ol>` parent elements
`[aria-hidden="true"]` is not present on the document `<body>`
No element has a `[tabindex]` value greater than 0
Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
`<html>` element has a valid value for its `[lang]` attribute
`[role]`s have all required `[aria-*]` attributes
`[aria-*]` attributes match their roles
Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
`<html>` element has a `[lang]` attribute
ARIA IDs are unique
`[role]` values are valid
Background and foreground colors have a sufficient contrast ratio
Document has a `<title>` element
Image elements have `[alt]` attributes
`[aria-*]` attributes have valid values
Mobile Usability
99/100
These checks validate how easily a visitor can use utoronto.ca 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
37/100
These checks analyze the performance of utoronto.ca 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 (6)
Optimize images
Eliminate render-blocking JavaScript and CSS in above-the-fold content
Enable compression
Leverage browser caching
Minify JavaScript
Minify HTML
Passed Audits (4)
Avoid landing page redirects
Reduce server response time
Minify CSS
Prioritize visible content
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