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Lighthouse Mobile

· 0 checks — Mobile Lighthouse audit -- Performance, Accessibility, Best Practices, and SEO category breakdown.
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Detailed Report

Audit breakdown by category with detailed findings.

14

Performance

Insights

Remove large, duplicate JavaScript modules from bundles to reduce unnecessary bytes consumed by network activity.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Polyfills and transforms enable older browsers to use new JavaScript features. However, many aren't necessary for modern browsers. Consider modifying your JavaScript build process to not transpile Baseline features, unless you know you must support older browsers. Learn why most sites can deploy ES6+ code without transpiling

Why this matters

Performance issues directly impact user engagement and conversion rates.

3rd party code can significantly impact load performance. Reduce and defer loading of 3rd party code to prioritize your page's content.

Why this matters

Performance issues directly impact user engagement and conversion rates.

A long cache lifetime can speed up repeat visits to your page. Learn more about caching.

Why this matters

Performance issues directly impact user engagement and conversion rates.

RequestCache TTLTransfer Size
/-/media/project/uchicago-tenant/www/videos/2023-fall-vid...604800.0 s10.1 MiB
www.uchicago.edu/dist/intranet/static/js/188.d88c0093.chunk.js0.0 ms195.9 KiB
/fonts/uchicago-serif/UChicagoSerif-SemiBold.woff20.0 ms166.7 KiB
/fonts/uchicago-sans-serif/UChicagoSansSerif-Bold.woff20.0 ms148.2 KiB
/fonts/uchicago-serif/UChicagoSerif-Regular.woff20.0 ms146.1 KiB
/fonts/uchicago-sans-serif/UChicagoSansSerif-RegularItali...0.0 ms144.5 KiB
/fonts/uchicago-sans-serif/UChicagoSansSerif-Regular.woff20.0 ms143.9 KiB
/fonts/uchicago-sans-serif/UChicagoSansSerif-SemiBold.woff20.0 ms143.0 KiB
www.uchicago.edu/dist/intranet/static/js/10.87ec4c99.chunk.js0.0 ms47.4 KiB
siteimproveanalytics.com/js/siteanalyze_66356295.js86400.0 s89.5 KiB
www.google-analytics.com/analytics.js7200.0 s20.9 KiB
www.uchicago.edu/dist/intranet/static/js/1.b676e5c1.chunk.js0.0 ms12.8 KiB
www.uchicago.edu/dist/intranet/static/js/11.1529c5fb.chunk.js0.0 ms12.7 KiB
www.uchicago.edu/dist/intranet/static/js/4.b83107bb.chunk.js0.0 ms12.5 KiB
www.uchicago.edu/dist/intranet/static/js/8.eac74171.chunk.js0.0 ms10.6 KiB
www.uchicago.edu/dist/intranet/static/js/main.8c2186e0.chunk.js0.0 ms10.3 KiB
www.uchicago.edu/dist/intranet/static/js/2.9a23649f.chunk.js0.0 ms9.5 KiB
www.uchicago.edu/dist/intranet/static/css/main.9ce48894.chunk.css0.0 ms7.7 KiB
static.hotjar.com/c/hotjar-3545609.js?sv=660.0 s6.2 KiB
cdn.mouseflow.com/projects/a75dda92-3b72-4372-92e6-174411be97b8.js86400.0 s14.8 KiB
www.uchicago.edu/dist/intranet/static/js/0.c4a55922.chunk.js0.0 ms5.8 KiB
www.uchicago.edu/dist/intranet/static/js/3.a48833b0.chunk.js0.0 ms5.8 KiB
www.uchicago.edu/-/media/project/uchicago-tenant/shared/phoenix.png604800.0 s57.9 KiB
kit.fontawesome.com/8a6f4b518c.js60.0 s5.7 KiB
www.uchicago.edu/dist/intranet/static/js/9.97029b91.chunk.js0.0 ms5.5 KiB
www.uchicago.edu/dist/intranet/static/js/EduHeader.ce25d182.chunk.js0.0 ms5.2 KiB
www.uchicago.edu/dist/intranet/static/css/EduHeader.d7662d17.chunk.css0.0 ms4.6 KiB
www.uchicago.edu/dist/intranet/static/js/CalloutTiles.d8a61509.chunk.js0.0 ms4.5 KiB
uchicago-brand-fonts.s3.us-east-2.amazonaws.com/UChicagoSansSerif.css0.0 ms4.0 KiB
/-/media/campus-415-320.jpg?h=320&iar=0&w=415&hash=4148C8...604800.0 s39.5 KiB
www.uchicago.edu/dist/intranet/static/css/NewsFeatured.3003077e.chunk.css0.0 ms3.9 KiB
www.uchicago.edu/dist/intranet/static/css/CalendarEmbed.245e9b2d.chunk.css0.0 ms3.8 KiB
/-/media/inside-the-lab-chuan-he.jpg?h=320&iar=0&w=415&ha...604800.0 s35.8 KiB
/-/media/project/uchicago-tenant/www/news/125448.jpg?h=33...604800.0 s35.7 KiB
events.uchicago.edu/widgets/new/www-homepage.php300.0 s3.1 KiB
www.uchicago.edu/dist/intranet/static/js/CalloutBannerList.4776459a.chunk.js0.0 ms3.0 KiB
www.uchicago.edu/dist/intranet/static/js/PhotoTabs.feae5a74.chunk.js0.0 ms2.9 KiB
/-/media/project/uchicago-tenant/www/news/125446.jpg?h=33...604800.0 s27.1 KiB
www.uchicago.edu/dist/intranet/static/js/Alert.24c933b3.chunk.js0.0 ms2.7 KiB
/-/media/project/uchicago-tenant/www/news/125445.jpg?h=33...604800.0 s26.5 KiB
www.uchicago.edu/dist/intranet/static/js/Footer.85a22dba.chunk.js0.0 ms2.6 KiB
www.uchicago.edu/dist/intranet/static/js/CalendarEmbed.0f6e9f46.chunk.js0.0 ms2.4 KiB
www.uchicago.edu/dist/intranet/static/css/CalloutTiles.e668b96e.chunk.css0.0 ms2.4 KiB
uchicago-brand-fonts.s3.us-east-2.amazonaws.com/UChicagoSerif.css0.0 ms2.3 KiB
www.uchicago.edu/dist/intranet/static/js/VideoSpotlight.2e150387.chunk.js0.0 ms2.3 KiB
www.uchicago.edu/dist/intranet/static/css/CalloutBannerList.3fb5c6d6.chunk.css0.0 ms2.3 KiB
www.uchicago.edu/dist/intranet/static/js/ImageTileGrid.364574e0.chunk.js0.0 ms2.1 KiB
www.uchicago.edu/dist/intranet/static/js/CTABarSpotlight.4692c968.chunk.js0.0 ms2.0 KiB
www.uchicago.edu/dist/intranet/static/js/HeadlineTextBold.37d0b4c4.chunk.js0.0 ms1.9 KiB
www.uchicago.edu/dist/intranet/static/css/HeadlineTextBold.97137b73.chunk.css0.0 ms1.7 KiB
www.uchicago.edu/dist/intranet/static/css/CTABarSpotlight.b18fad13.chunk.css0.0 ms1.7 KiB
www.uchicago.edu/dist/intranet/static/js/NewsFeatured.a30608ca.chunk.js0.0 ms1.6 KiB
www.uchicago.edu/layouts/system/VisitorIdentification.js0.0 ms1.5 KiB
/-/media/project/uchicago-tenant/intranet/test-images/foo...604800.0 s15.1 KiB
www.uchicago.edu/dist/intranet/static/css/VideoSpotlight.9785ee27.chunk.css0.0 ms1.5 KiB
www.uchicago.edu/dist/intranet/static/js/HeadlineBar.bcec1187.chunk.js0.0 ms1.4 KiB
www.uchicago.edu/dist/intranet/static/css/ImageTileGrid.adf7d7c6.chunk.css0.0 ms1.4 KiB
www.uchicago.edu/dist/intranet/static/css/Alert.337bee6d.chunk.css0.0 ms1.3 KiB
/-/media/images/logo-background.svg?iar=0&hash=C926BC4DEC...604800.0 s12.8 KiB
www.uchicago.edu/dist/intranet/static/css/PhotoTabs.135cfcb9.chunk.css0.0 ms1.3 KiB
www.uchicago.edu/dist/intranet/static/css/Footer.00f7061b.chunk.css0.0 ms1.2 KiB
www.uchicago.edu/dist/intranet/static/js/SectionWrap.fdd7d34d.chunk.js0.0 ms1.1 KiB
www.uchicago.edu/dist/intranet/static/js/Snippet.480714da.chunk.js0.0 ms1.0 KiB
www.uchicago.edu/dist/intranet/static/css/SectionWrap.70155bcb.chunk.css0.0 ms1.0 KiB
www.uchicago.edu/dist/intranet/static/css/3.151423ab.chunk.css0.0 ms1.0 KiB
www.uchicago.edu/dist/intranet/static/css/HeadlineBar.f7ba702e.chunk.css0.0 ms833 B
/-/media/images/logo-background-mobile.svg?iar=0&hash=72D...604800.0 s7.7 KiB
/dist/intranet/static/js/SingleColumnWideLayout.accc253e....0.0 ms707 B
www.uchicago.edu/dist/intranet/static/js/PageBanner.22fbcd26.chunk.js0.0 ms691 B

Layout shifts occur when elements move absent any user interaction. Investigate the causes of layout shifts, such as elements being added, removed, or their fonts changing as the page loads.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:node label:Element subItemsHeading:map[key:extra] valueType:node] map[granularity:0.001 key:score label:Layout shift score subItemsHeading:map[key:cause valueType:text] valueType:numeric]]
items: [map[node:map[type:text value:Total] score:1.4543110000000001] map[node:map[boundingRect:map[bottom:7098 height:663 left:0 right:412 top:6435 width:412] lhId:page-6-FOOTER nodeLabel:The University of Chicago Edward H. Levi Hall 5801 S. Ellis Ave. Chicago, IL 60… path:1,HTML,1,BODY,5,DIV,5,FOOTER selector:body > div#root > footer.Footer_container__2dL8M snippet:<footer class="Footer_container__2dL8M"> type:node] score:0.737898 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:6540 height:73 left:24 right:343 top:6467 width:319] lhId:page-4-IMG nodeLabel:The University of Chicago path:1,HTML,1,BODY,5,DIV,5,FOOTER,1,DIV,0,DIV,0,DIV,0,IMG selector:div.Footer_innerContainer__1hWCN > div.Footer_mainContainer__3KTjC > div.Footer_logoContainer__2DO2w > img.Footer_logo__1Xaa8 snippet:<img alt="The University of Chicago" width="403" height="92" class="Footer_logo__1Xaa8" src="https://www.uchicago.edu/-/media/project/uchicago-tenant/intranet/test-ima…"> type:node]]] type:subitems]] map[node:map[boundingRect:map[bottom:7098 height:663 left:0 right:412 top:6435 width:412] lhId:page-6-FOOTER nodeLabel:The University of Chicago Edward H. Levi Hall 5801 S. Ellis Ave. Chicago, IL 60… path:1,HTML,1,BODY,5,DIV,5,FOOTER selector:body > div#root > footer.Footer_container__2dL8M snippet:<footer class="Footer_container__2dL8M"> type:node] score:0.351355 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:6540 height:73 left:24 right:343 top:6467 width:319] lhId:page-4-IMG nodeLabel:The University of Chicago path:1,HTML,1,BODY,5,DIV,5,FOOTER,1,DIV,0,DIV,0,DIV,0,IMG selector:div.Footer_innerContainer__1hWCN > div.Footer_mainContainer__3KTjC > div.Footer_logoContainer__2DO2w > img.Footer_logo__1Xaa8 snippet:<img alt="The University of Chicago" width="403" height="92" class="Footer_logo__1Xaa8" src="https://www.uchicago.edu/-/media/project/uchicago-tenant/intranet/test-ima…"> type:node]]] type:subitems]] map[node:map[boundingRect:map[bottom:2357 height:671 left:0 right:412 top:1687 width:412] lhId:page-15-SECTION nodeLabel:The Day Tomorrow Began LEARN ABOUT THE GENESIS OF GROUNDBREAKING IDEAS FROM UCH… path:1,HTML,1,BODY,5,DIV,4,MAIN,0,DIV,2,SECTION,2,SECTION selector:main > div.jss-main > section.single-col-wide > section snippet:<section> type:node] score:0.319365 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:6540 height:73 left:24 right:343 top:6467 width:319] lhId:page-4-IMG nodeLabel:The University of Chicago path:1,HTML,1,BODY,5,DIV,5,FOOTER,1,DIV,0,DIV,0,DIV,0,IMG selector:div.Footer_innerContainer__1hWCN > div.Footer_mainContainer__3KTjC > div.Footer_logoContainer__2DO2w > img.Footer_logo__1Xaa8 snippet:<img alt="The University of Chicago" width="403" height="92" class="Footer_logo__1Xaa8" src="https://www.uchicago.edu/-/media/project/uchicago-tenant/intranet/test-ima…"> type:node]] map[cause:Web font extra:map[type:url value:https://ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-regular-400-1.woff2]]] type:subitems]] map[node:map[boundingRect:map[bottom:809 height:69 left:72 right:340 top:740 width:268] lhId:page-16-DIV nodeLabel:Could AI help us be more thoughtful voters? Source: UChicago News path:1,HTML,1,BODY,5,DIV,4,MAIN,0,DIV,2,SECTION,1,DIV,1,SECTION,0,DIV,0,UL,0,LI,0,DIV,1,DIV selector:ul.NewsFeatured_newsList__19dBn > li.NewsFeatured_newsListItem__2Ygiz > div.NewsItem_container__2d2hu > div.NewsItem_textContainer__1cFxG snippet:<div class="NewsItem_textContainer__1cFxG"> type:node] score:0.045693 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:6540 height:73 left:24 right:343 top:6467 width:319] lhId:page-4-IMG nodeLabel:The University of Chicago path:1,HTML,1,BODY,5,DIV,5,FOOTER,1,DIV,0,DIV,0,DIV,0,IMG selector:div.Footer_innerContainer__1hWCN > div.Footer_mainContainer__3KTjC > div.Footer_logoContainer__2DO2w > img.Footer_logo__1Xaa8 snippet:<img alt="The University of Chicago" width="403" height="92" class="Footer_logo__1Xaa8" src="https://www.uchicago.edu/-/media/project/uchicago-tenant/intranet/test-ima…"> type:node]]] type:subitems]]]

Your first network request is the most important. Reduce its latency by avoiding redirects, ensuring a fast server response, and enabling text compression.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Consider setting font-display to swap or optional to ensure text is consistently visible. swap can be further optimized to mitigate layout shifts with font metric overrides.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLEst Savings
ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-regular-400-1.woff275 ms
ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-solid-900-12.woff235 ms
ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-brands-400-1.woff230 ms
ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-brands-400-0.woff225 ms
ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-regular-400-0.woff220 ms
ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-regular-400-12.woff215 ms

A forced reflow occurs when JavaScript queries geometric properties (such as offsetWidth) after styles have been invalidated by a change to the DOM state. This can result in poor performance. Learn more about forced reflows and possible mitigations.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:source label:Top function call valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]
items: [map[reflowTime:53.925 source:map[column:321721 line:2 type:source-location url:https://www.uchicago.edu/dist/intranet/static/js/188.d88c0093.chunk.js urlProvider:network]]]
headings: [map[key:source label:Source valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]
items: [map[reflowTime:53.925 source:map[column:2663 line:0 type:source-location url:https://www.uchicago.edu/dist/intranet/static/js/ImageTileGrid.364574e0.chunk.js urlProvider:network]]]

Reducing the download time of images can improve the perceived load time of the page and LCP. Learn more about optimizing image size

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLResource SizeEst Savings
The Day Tomorrow Began div.slideInner___2mfX9 > section.CalloutBannerList_container__28NGw > div.CalloutBannerList_imageContainer__2eEqU > img.CalloutBannerList_image__gysfb
/-/media/campus-415-320.jpg?h=320&iar=0&w=415&hash=4148C8...39.1 KiB17.5 KiB
American voters cast their ballots at the polls li.NewsFeatured_newsListItem__2Ygiz > div.NewsItem_container__2d2hu > div > img.NewsItem_image__3ztUc
/-/media/project/uchicago-tenant/www/news/125448.jpg?h=33...35.2 KiB13.9 KiB
A couple embraces one another li.NewsFeatured_newsListItem__2Ygiz > div.NewsItem_container__2d2hu > div > img.NewsItem_image__3ztUc
/-/media/project/uchicago-tenant/www/news/125446.jpg?h=33...26.6 KiB10.5 KiB
Cobb Gate li.NewsFeatured_newsListItem__2Ygiz > div.NewsItem_container__2d2hu > div > img.NewsItem_image__3ztUc
/-/media/project/uchicago-tenant/www/news/125445.jpg?h=33...26.1 KiB10.2 KiB
The University of Chicago div.Footer_innerContainer__1hWCN > div.Footer_mainContainer__3KTjC > div.Footer_logoContainer__2DO2w > img.Footer_logo__1Xaa8
/-/media/project/uchicago-tenant/intranet/test-images/foo...14.7 KiB8.7 KiB

Optimize LCP by making the LCP image discoverable from the HTML immediately, and avoiding lazy-loading

Why this matters

Performance issues directly impact user engagement and conversion rates.

lhId: page-5-VIDEO
nodeLabel: section.single-col-wide > section > div.VideoSpotlight_videoSpotlight__EC6TG > video.VideoSpotlight_backgroundVideo__1Gp0g
path: 1,HTML,1,BODY,5,DIV,4,MAIN,0,DIV,1,SECTION,0,SECTION,0,DIV,1,VIDEO
selector: section.single-col-wide > section > div.VideoSpotlight_videoSpotlight__EC6TG > video.VideoSpotlight_backgroundVideo__1Gp0g
snippet: <video class="VideoSpotlight_backgroundVideo__1Gp0g" height="600" autoplay="" playsinline="" aria-describedby="video-spotlight-desc" loop="">

Avoid chaining critical requests by reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load.

Why this matters

Performance issues directly impact user engagement and conversion rates.

description: [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints help the browser establish a connection earlier in the page load, saving time when the first request for that origin is made. The following are the origins that the page preconnected to.
title: Preconnected origins
value: no origins were preconnected
description: Add [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints to your most important origins, but try to use no more than 4.
title: Preconnect candidates

Requests are blocking the page's initial render, which may delay LCP. Deferring or inlining can move these network requests out of the critical path.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTransfer SizeDuration
uchicago-brand-fonts.s3.us-east-2.amazonaws.com/UChicagoSerif.css2.3 KiB828 ms
uchicago-brand-fonts.s3.us-east-2.amazonaws.com/UChicagoSansSerif.css4.0 KiB828 ms
www.uchicago.edu/dist/intranet/static/js/188.d88c0093.chunk.js195.9 KiB1.7 s
www.uchicago.edu/dist/intranet/static/js/main.8c2186e0.chunk.js10.3 KiB153 ms
www.uchicago.edu/dist/intranet/static/css/main.9ce48894.chunk.css7.7 KiB

These insights are also available in the Chrome DevTools Performance Panel - record a trace to view more detailed information.

Redirects introduce additional delays before the page can be loaded. Learn how to avoid page redirects.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 799 ms
URLTime Spent
uchicago.edu/799 ms
www.uchicago.edu/0.0 ms

These are the largest layout shifts observed on the page. Each table item represents a single layout shift, and shows the element that shifted the most. Below each item are possible root causes that led to the layout shift. Some of these layout shifts may not be included in the CLS metric value due to windowing. Learn how to improve CLS

Why this matters

Performance issues directly impact user engagement and conversion rates.

ElementLayout shift score
The University of Chicago Edward H. Levi Hall 5801 S. Ellis Ave. Chicago, IL 60… body > div#root > footer.Footer_container__2dL8M
0.738
The University of Chicago Edward H. Levi Hall 5801 S. Ellis Ave. Chicago, IL 60… body > div#root > footer.Footer_container__2dL8M
0.351
The Day Tomorrow Began LEARN ABOUT THE GENESIS OF GROUNDBREAKING IDEAS FROM UCH… main > div.jss-main > section.single-col-wide > section
0.319
Could AI help us be more thoughtful voters? Source: UChicago News ul.NewsFeatured_newsList__19dBn > li.NewsFeatured_newsListItem__2Ygiz > div.NewsItem_container__2d2hu > div.NewsItem_textContainer__1cFxG
0.046

Time to Interactive is the amount of time it takes for the page to become fully interactive. Learn more about the Time to Interactive metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

TTI

The maximum potential First Input Delay that your users could experience is the duration of the longest task. Learn more about the Maximum Potential First Input Delay metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Diagnostics

Reduce unused JavaScript and defer loading scripts until they are required to decrease bytes consumed by network activity. Learn how to reduce unused JavaScript.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 1.0 s 524.8 KiB
URLTransfer SizeEst Savings
www.googletagmanager.com/gtag/js?id=G-2V4M4Z833J&cx=c&gtm=4e64h1155.5 KiB110.4 KiB
www.uchicago.edu/dist/intranet/static/js/188.d88c0093.chunk.js195.6 KiB109.5 KiB
siteimproveanalytics.com/js/siteanalyze_66356295.js88.7 KiB72.9 KiB
www.googletagmanager.com/gtag/js?id=G-2V4M4Z833J155.5 KiB66.1 KiB
www.googletagmanager.com/gtag/js?id=G-DBDWJCS0JR&cx=c&_slc=1148.0 KiB65.2 KiB
www.googletagmanager.com/gtm.js?id=GTM-NCZDFHH123.4 KiB62.9 KiB
script.hotjar.com/modules.6a0f3932cb1341a35c18.js56.1 KiB37.8 KiB

Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to reduce Javascript execution time.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTotal CPU TimeScript EvaluationScript Parse
www.uchicago.edu/dist/intranet/static/js/188.d88c0093.chunk.js1.2 s704 ms99 ms
Unattributable847 ms24 ms0.0 ms
www.uchicago.edu/591 ms82 ms4.7 ms
www.googletagmanager.com/gtag/js?id=G-2V4M4Z833J383 ms271 ms69 ms
www.googletagmanager.com/gtag/js?id=G-DBDWJCS0JR&cx=c&_slc=1268 ms214 ms51 ms
www.googletagmanager.com/gtm.js?id=GTM-NCZDFHH252 ms194 ms44 ms
www.uchicago.edu/dist/intranet/static/js/main.8c2186e0.chunk.js242 ms234 ms6.5 ms
script.hotjar.com/modules.6a0f3932cb1341a35c18.js197 ms168 ms26 ms
kit.fontawesome.com/8a6f4b518c.js126 ms122 ms2.1 ms
siteimproveanalytics.com/js/siteanalyze_66356295.js117 ms69 ms41 ms
www.google-analytics.com/analytics.js116 ms93 ms12 ms
www.googletagmanager.com/gtag/js?id=G-2V4M4Z833J&cx=c&gtm=4e64h199 ms30 ms69 ms
www.uchicago.edu/dist/intranet/static/js/10.87ec4c99.chunk.js57 ms34 ms23 ms

Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to minimize main-thread work

Why this matters

Performance issues directly impact user engagement and conversion rates.

CategoryTime Spent
Script Evaluation2.4 s
Other1.1 s
Style & Layout589 ms
Script Parsing & Compilation543 ms
Rendering78 ms
Parse HTML & CSS51 ms
Garbage Collection40 ms

Many navigations are performed by going back to a previous page, or forwards again. The back/forward cache (bfcache) can speed up these return navigations. Learn more about the bfcache

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failure reasonFailure type
Pages with cache-control:no-store header cannot enter back/forward cache.Actionable
Pages whose main resource has cache-control:no-store cannot enter back/forward cache.Not actionable
Back/forward cache is disabled because some JavaScript network request received resource with Cache-Control: no-store header.Not actionable

Reduce unused rules from stylesheets and defer CSS not used for above-the-fold content to decrease bytes consumed by network activity. Learn how to reduce unused CSS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 0.0 ms 113.8 KiB
URLTransfer SizeEst Savings
/*! * Font Awesome Pro 6.7.2 by @fontawesome - https://fontawesome.com * License - https://fontaw…102.9 KiB102.4 KiB
/*! * Font Awesome Pro 6.7.2 by @fontawesome - https://fontawesome.com * License - https://fontaw…11.4 KiB11.4 KiB

Large network payloads cost users real money and are highly correlated with long load times. Learn how to reduce payload sizes.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTransfer Size
/-/media/project/uchicago-tenant/www/videos/2023-fall-vid...10.1 MiB
www.uchicago.edu/dist/intranet/static/js/188.d88c0093.chunk.js195.9 KiB
/fonts/uchicago-serif/UChicagoSerif-SemiBold.woff2166.7 KiB
www.googletagmanager.com/gtag/js?id=G-2V4M4Z833J&cx=c&gtm=4e64h1155.6 KiB
www.googletagmanager.com/gtag/js?id=G-2V4M4Z833J155.6 KiB
/fonts/uchicago-sans-serif/UChicagoSansSerif-Bold.woff2148.2 KiB
www.googletagmanager.com/gtag/js?id=G-DBDWJCS0JR&cx=c&_slc=1148.0 KiB
/fonts/uchicago-serif/UChicagoSerif-Regular.woff2146.1 KiB
/fonts/uchicago-sans-serif/UChicagoSansSerif-RegularItali...144.5 KiB
/fonts/uchicago-sans-serif/UChicagoSansSerif-Regular.woff2143.9 KiB

Set an explicit width and height on image elements to reduce layout shifts and improve CLS. Learn how to set image dimensions

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL
American voters cast their ballots at the polls li.NewsFeatured_newsListItem__2Ygiz > div.NewsItem_container__2d2hu > div > img.NewsItem_image__3ztUc
/-/media/project/uchicago-tenant/www/news/125448.jpg?h=33...
A couple embraces one another li.NewsFeatured_newsListItem__2Ygiz > div.NewsItem_container__2d2hu > div > img.NewsItem_image__3ztUc
/-/media/project/uchicago-tenant/www/news/125446.jpg?h=33...
Cobb Gate li.NewsFeatured_newsListItem__2Ygiz > div.NewsItem_container__2d2hu > div > img.NewsItem_image__3ztUc
/-/media/project/uchicago-tenant/www/news/125445.jpg?h=33...
The University of Chicago Logo header#header > a.EduHeader_logoContainer__1rYiP > span.linkText > img.EduHeader_mobileLogo__2-wip
/-/media/images/logo-background-mobile.svg?iar=0&hash=72D...

More information about the performance of your application. These numbers don't directly affect the Performance score.

●Optimize DOM size
●LCP breakdown
●Optimize viewport for mobile
●Minify CSS
●Minify JavaScript
●User Timing marks and measures 10 user timings
●Avoid long main-thread tasks 20 long tasks found
●Avoid non-composited animations 5 animated elements found
●Network Requests
●Network Round Trip Times 20 ms
●Server Backend Latencies 90 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Initial server response time was short Root document took 370 ms
○INP breakdown
94

Accessibility

These checks highlight opportunities to improve the accessibility of your web app. Automatic detection can only detect a subset of issues and does not guarantee the accessibility of your web app, so manual testing is also encouraged.

ARIA

Each ARIA `role` supports a specific subset of `aria-*` attributes. Mismatching these invalidates the `aria-*` attributes. Learn how to match ARIA attributes to their roles.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
The Day Tomorrow Began LEARN ABOUT THE GENESIS OF GROUNDBREAKING IDEAS FROM UCH… div.horizontalSlider___281Ls > div.carousel__slider-tray-wrapper > div.sliderTray___-vHFQ > div.slide___3-Nqo

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.

○Interactive controls are keyboard focusable
○Interactive elements indicate their purpose and state
○The page has a logical tab order
○Visual order on the page follows DOM order
○User focus is not accidentally trapped in a region
○The user's focus is directed to new content added to the page
○HTML5 landmark elements are used to improve navigation
○Offscreen content is hidden from assistive technology
○Custom controls have associated labels
○Custom controls have ARIA roles
●`[aria-hidden="true"]` is not present on the document `<body>`
●`[aria-*]` attributes have valid values
●`[aria-*]` attributes are valid and not misspelled
●Buttons have an accessible name
●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.
●ARIA attributes are used as specified for the element's role
●`[aria-hidden="true"]` elements do not contain focusable descendents
●Elements use only permitted ARIA attributes
●Background and foreground colors have a sufficient contrast ratio
●Document has a `<title>` element
●`<html>` element has a `[lang]` attribute
●`<html>` element has a valid value for its `[lang]` attribute
●Links have a discernible name
●Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
●List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements
●No element has a `[tabindex]` value greater than 0
●Touch targets have sufficient size and spacing.
●Heading elements appear in a sequentially-descending order
●Skip links are focusable.
●Document has a main landmark.
●`<video>` elements contain a `<track>` element with `[kind="captions"]`
●Identical links have the same purpose.
●Elements with visible text labels have matching accessible names.
○`[accesskey]` values are unique
○`button`, `link`, and `menuitem` elements have accessible names
○Deprecated ARIA roles were not used
○Elements with `role="dialog"` or `role="alertdialog"` have accessible names.
○ARIA input fields have accessible names
○ARIA `meter` elements have accessible names
○ARIA `progressbar` elements have accessible names
○`[role]`s have all required `[aria-*]` attributes
○Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
○`[role]`s are contained by their required parent element
○`[role]` values are valid
○Elements with the `role=text` attribute do not have focusable descendents.
○ARIA toggle fields have accessible names
○ARIA `tooltip` elements have accessible names
○ARIA `treeitem` elements have accessible names
○The page contains a heading, skip link, or landmark region
○`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.
○Definition list items are wrapped in `<dl>` elements
○ARIA IDs are unique
○No form fields have multiple labels
○`<frame>` or `<iframe>` elements have a title
○`<html>` element has an `[xml:lang]` attribute with the same base language as the `[lang]` attribute.
○Input buttons have discernible text.
○`<input type="image">` elements have `[alt]` text
○Form elements have associated labels
○Links are distinguishable without relying on color.
○The document does not use `<meta http-equiv="refresh">`
○`<object>` elements have alternate text
○Select elements have associated label elements.
○Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
○`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.
○`[lang]` attributes have a valid value
○Tables have different content in the summary attribute and `<caption>`.
○All heading elements contain content.
○Uses ARIA roles only on compatible elements
○Image elements do not have `[alt]` attributes that are redundant text.
○Tables use `<caption>` instead of cells with the `[colspan]` attribute to indicate a caption.
○`<td>` elements in a large `<table>` have one or more table headers.
100

Best Practices

●Uses HTTPS
●Avoids deprecated APIs
●Avoids third-party cookies
●Allows users to paste into input fields
●Avoids requesting the geolocation permission on page load
●Avoids requesting the notification permission on page load
●Displays images with correct aspect ratio
●Serves images with appropriate resolution
●Page has the HTML doctype
●Properly defines charset
●No browser errors logged to the console
●No issues in the `Issues` panel in Chrome Devtools
●Ensure CSP is effective against XSS attacks
●Use a strong HSTS policy
●Ensure proper origin isolation with COOP
●Mitigate clickjacking with XFO or CSP
●Mitigate DOM-based XSS with Trusted Types
●Detected JavaScript libraries
●Page has valid source maps
○Redirects HTTP traffic to HTTPS
92

SEO

These checks ensure that your page is following basic search engine optimization advice. There are many additional factors Lighthouse does not score here that may affect your search ranking, including performance on Core Web Vitals. Learn more about Google Search Essentials.

Content Best Practices

Descriptive link text helps search engines understand your content. Learn how to make links more accessible.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Link destinationLink Text
www.uchicago.edu/who-we-areLEARN MORE
www.uchicago.edu/admissionsLEARN MORE
www.uchicago.edu/who-we-are/scholarship-at-uchicagoLEARN MORE
www.uchicago.edu/education-and-researchLEARN MORE
www.uchicago.edu/who-we-are/community-impactLEARN MORE
www.uchicago.edu/who-we-are/global-impactLEARN MORE
www.uchicago.edu/life-at-uchicago/hyde-parkLEARN MORE

Format your HTML in a way that enables crawlers to better understand your app’s content.

○Structured data is valid
●Page isn’t blocked from indexing
●Document has a `<title>` element
●Document has a meta description
●Page has successful HTTP status code
●Links are crawlable
●robots.txt is valid
●Image elements have `[alt]` attributes
●Document has a valid `hreflang`
○Document has a valid `rel=canonical`

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