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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.

33

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
/etc.clientlibs/nyucore/clientlibs/clientlib-site/resourc...14400.0 s395.8 KiB
/_jcr_content/root/container/nyu_storytelling.coreimg.82....900.0 s107.9 KiB
/_jcr_content/root/container/nyu_fullwidth_promo.coreimg....900.0 s68.6 KiB
webstatic.nyu.edu/fonts/NYUPerstare-VF.woff20.0 ms54.6 KiB
cdn.cookielaw.org/scripttemplates/202501.2.0/otBannerSdk.js86400.0 s114.5 KiB
www.nyu.edu/etc.clientlibs/nyucore/clientlibs/clientlib-site.css14400.0 s66.6 KiB
/about/news-publications/news/2026/april/2026-undergrad-r...900.0 s49.3 KiB
/about/news-publications/news/2025/december/brooklyn-is-n...900.0 s35.0 KiB
www.nyu.edu/etc.clientlibs/nyuwww/clientlibs/clientlib-js-index.js14400.0 s42.4 KiB
/about/news-publications/news/2026/april/cool-course--gam...900.0 s28.6 KiB
f.vimeocdn.com/p/4.46.41/js/player.module.js1209600.0 s210.2 KiB
www.nyu.edu/etc.clientlibs/nyuwww/clientlibs/clientlib-site.css14400.0 s22.9 KiB
www.nyu.edu/etc.clientlibs/nyuwww/clientlibs/clientlib-site.js14400.0 s21.6 KiB
www.nyu.edu/etc.clientlibs/nyuwww/clientlibs/clientlib-base.js14400.0 s15.6 KiB
www.nyu.edu/etc.clientlibs/nyucore/clientlibs/clientlib-base.js14400.0 s15.6 KiB
f.vimeocdn.com/p/4.46.41/js/vendor.module.js1209600.0 s93.5 KiB
www.nyu.edu/etc.clientlibs/nyucore/clientlibs/clientlib-js-Modal.js14400.0 s12.7 KiB
player.vimeo.com/api/player.js1800.0 s9.0 KiB
/logos/8f75b951-5eef-476b-9db9-2a6ca681763d/01938d40-66a9...86400.0 s16.6 KiB
www.nyu.edu/etc.clientlibs/nyucore/clientlibs/clientlib-site.js14400.0 s8.2 KiB
www.nyu.edu/etc.clientlibs/nyucore/clientlibs/clientlib-base.css14400.0 s8.2 KiB
www.nyu.edu/etc.clientlibs/nyuwww/clientlibs/clientlib-base.css14400.0 s8.2 KiB
cdn.cookielaw.org/scripttemplates/otSDKStub.js86400.0 s9.1 KiB
www.nyu.edu/etc.clientlibs/clientlibs/granite/jquery/granite/csrf.js0.0 ms3.0 KiB
f.vimeocdn.com/p/4.46.41/css/player.css1209600.0 s23.9 KiB
www.nyu.edu/etc.clientlibs/nyucore/clientlibs/clientlib-js-ShowVideo.js14400.0 s3.1 KiB
/etc.clientlibs/core/wcm/components/commons/site/clientli...0.0 ms1.8 KiB
www.nyu.edu/content/dam/nyuwww/icons/instagram.svg900.0 s1.7 KiB
www.nyu.edu/content/dam/nyuwww/icons/linkedin.svg900.0 s1.5 KiB
www.nyu.edu/etc.clientlibs/nyuwww/clientlibs/clientlib-js-ajaxRequest.js14400.0 s1.9 KiB
www.nyu.edu/content/dam/nyuwww/icons/youtube.svg900.0 s1.4 KiB
www.nyu.edu/etc.clientlibs/nyuwww/clientlibs/clientlib-js-Alerts.js14400.0 s1.7 KiB
www.nyu.edu/etc.clientlibs/nyucore/clientlibs/clientlib-js-Accordion.js14400.0 s1.7 KiB
cdn.cookielaw.org/logos/static/powered_by_logo.svg86400.0 s2.6 KiB
www.nyu.edu/content/dam/nyuwww/icons/facebook.svg900.0 s1.1 KiB
www.nyu.edu/etc.clientlibs/nyuwww/clientlibs/clientlib-js-Dropdown.js14400.0 s1.4 KiB
www.nyu.edu/content/dam/nyuwww/icons/x.svg900.0 s1.1 KiB
www.nyu.edu/content/dam/nyuwww/icons/icon2.svg900.0 s1.1 KiB
www.nyu.edu/etc.clientlibs/nyucore/clientlibs/clientlib-js-queryStringHandler.js14400.0 s1.3 KiB
www.nyu.edu/etc.clientlibs/nyuwww/clientlibs/clientlib-js-FeedbackSubmit.js14400.0 s1.3 KiB
www.nyu.edu/content/dam/nyuwww/icons/icon3.svg900.0 s978 B
www.nyu.edu/etc.clientlibs/nyuwww/clientlibs/clientlib-js-AnimateHero.js14400.0 s1.2 KiB
www.nyu.edu/etc.clientlibs/nyuwww/clientlibs/clientlib-js-MainNavigation.js14400.0 s1.2 KiB
www.nyu.edu/content/dam/nyuwww/icons/icon4.svg900.0 s953 B
www.nyu.edu/content/dam/nyuwww/icons/icon5.svg900.0 s949 B
www.nyu.edu/etc.clientlibs/nyuwww/clientlibs/clientlib-js-Breadcrumbs.js14400.0 s1.2 KiB
www.nyu.edu/content/dam/nyu/icons/icon1.svg900.0 s944 B
www.nyu.edu/etc.clientlibs/nyucore/clientlibs/clientlib-js-Spotlight.js14400.0 s1.2 KiB
www.nyu.edu/etc.clientlibs/nyuwww/clientlibs/clientlib-js-SearchToggle.js14400.0 s1.1 KiB
/etc.clientlibs/nyuwww/clientlibs/clientlib-js-getFocusab...14400.0 s1.1 KiB
www.nyu.edu/etc.clientlibs/nyucore/clientlibs/clientlib-dependencies.js14400.0 s497 B
www.nyu.edu/etc.clientlibs/nyuwww/clientlibs/clientlib-nyucore.js14400.0 s497 B
www.nyu.edu/etc.clientlibs/nyuwww/clientlibs/clientlib-dependencies.js14400.0 s460 B
www.nyu.edu/etc.clientlibs/nyuwww/clientlibs/clientlib-nyucore.css14400.0 s450 B
www.nyu.edu/etc.clientlibs/nyucore/clientlibs/clientlib-dependencies.css14400.0 s449 B
www.nyu.edu/etc.clientlibs/nyuwww/clientlibs/clientlib-dependencies.css14400.0 s447 B

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
/etc.clientlibs/nyucore/clientlibs/clientlib-site/resourc...55 ms
webstatic.nyu.edu/fonts/NYUPerstare-VF.woff235 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:1.056 source:map[column:25 line:112 type:source-location url:https://www.nyu.edu/etc.clientlibs/nyucore/clientlibs/clientlib-js-ShowVideo.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:5.604 source:map[column:52 line:77 type:source-location url:https://www.nyu.edu/etc.clientlibs/nyuwww/clientlibs/clientlib-site.js urlProvider:network]] map[reflowTime:5.062 source:map[column:75 line:861 type:source-location url:https://www.nyu.edu/etc.clientlibs/nyucore/clientlibs/clientlib-site.js urlProvider:network]] map[reflowTime:20.858 source:map[column:52 line:77 type:source-location url:https://www.nyu.edu/etc.clientlibs/nyucore/clientlibs/clientlib-site.js urlProvider:network]] map[reflowTime:5.035 source:map[column:35 line:976 type:source-location url:https://www.nyu.edu/etc.clientlibs/nyucore/clientlibs/clientlib-site.js urlProvider:network]] map[reflowTime:12.393 source:map[column:54 line:980 type:source-location url:https://www.nyu.edu/etc.clientlibs/nyucore/clientlibs/clientlib-site.js urlProvider:network]] map[reflowTime:108.372 source:map[type:text value:[unattributed]]] map[reflowTime:1.056 source:map[column:29 line:113 type:source-location url:https://www.nyu.edu/etc.clientlibs/nyucore/clientlibs/clientlib-js-ShowVideo.js urlProvider:network]] map[reflowTime:0.131 source:map[column:55 line:802 type:source-location url:https://www.googletagmanager.com/gtag/js?id=G-S194DLZYBD&cx=c&gtm=4e64h1 urlProvider:network]]]

Each subpart has specific improvement strategies. Ideally, most of the LCP time should be spent on loading the resources, not within delays.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:label label:Subpart valueType:text] map[key:duration label:Duration valueType:ms]]
items: [map[duration:479.8529990234375 label:Time to first byte subpart:timeToFirstByte] map[duration:2540.9850009765623 label:Element render delay subpart:elementRenderDelay]]
lhId: page-0-P
nodeLabel: NYU is as dynamic and groundbreaking as the city we call home. We remove the bo…
path: 1,HTML,1,BODY,3,DIV,0,DIV,0,DIV,1,MAIN,0,DIV,0,DIV,0,DIV,1,DIV,0,DIV,1,DIV,1,P
selector: div.nyu-hero > div.cmp-hero > div.cmp-hero__content > p
snippet: <p>

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
www.nyu.edu/etc/cloudsettings/default/contexthub.kernel.js0 B
www.nyu.edu/etc.clientlibs/nyuwww/clientlibs/clientlib-site.css22.9 KiB166 ms
www.nyu.edu/etc.clientlibs/nyucore/clientlibs/clientlib-base.css8.2 KiB
www.nyu.edu/etc.clientlibs/nyucore/clientlibs/clientlib-site.css66.6 KiB499 ms
www.nyu.edu/etc.clientlibs/nyuwww/clientlibs/clientlib-base.css8.2 KiB
www.nyu.edu/etc.clientlibs/nyuwww/clientlibs/clientlib-dependencies.js460 B
www.nyu.edu/etc.clientlibs/nyuwww/clientlibs/clientlib-dependencies.css447 B
www.nyu.edu/etc.clientlibs/nyuwww/clientlibs/clientlib-nyucore.css450 B
www.nyu.edu/etc.clientlibs/nyucore/clientlibs/clientlib-dependencies.css449 B166 ms

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
div.cmp-storytelling__image > div.cmp-teaser__image > div#nyu-storytelling-7b2c237681-image > img.cmp-image__image div.cmp-storytelling__image > div.cmp-teaser__image > div#nyu-storytelling-7b2c237681-image > img.cmp-image__image
/_jcr_content/root/container/nyu_storytelling.coreimg.82....107.4 KiB84.8 KiB
div#nyu-fullwidth-promo-0f6ea5c5ce > div.cmp-teaser__image > div#nyu-fullwidth-promo-0f6ea5c5ce-image > img.cmp-image__image div#nyu-fullwidth-promo-0f6ea5c5ce > div.cmp-teaser__image > div#nyu-fullwidth-promo-0f6ea5c5ce-image > img.cmp-image__image
/_jcr_content/root/container/nyu_fullwidth_promo.coreimg....68.0 KiB54.7 KiB
Shelby Liles posing in front of a couthouse li.cmp-publication-featured-stories__story > div.cmp-publication-featured-stories__story-inner > div.cmp-publication-featured-stories__image > img
/about/news-publications/news/2026/april/2026-undergrad-r...48.8 KiB33.7 KiB
div.cmp-publication-featured-stories__story > div.cmp-publication-featured-stories__story-inner > div.cmp-publication-featured-stories__image > img div.cmp-publication-featured-stories__story > div.cmp-publication-featured-stories__story-inner > div.cmp-publication-featured-stories__image > img
/about/news-publications/news/2025/december/brooklyn-is-n...34.5 KiB17.6 KiB
Students huddle around a computer screen with cards describing their resources li.cmp-publication-featured-stories__story > div.cmp-publication-featured-stories__story-inner > div.cmp-publication-featured-stories__image > img
/about/news-publications/news/2026/april/cool-course--gam...28.2 KiB13.1 KiB

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

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

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: 1.1 s
URLTime Spent
nyu.edu/1.1 s
www.nyu.edu/0.0 ms

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

Minifying JavaScript files can reduce payload sizes and script parse time. Learn how to minify JavaScript.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 340 ms 37.3 KiB
URLTransfer SizeEst Savings
www.nyu.edu/etc.clientlibs/nyuwww/clientlibs/clientlib-js-index.js41.9 KiB12.5 KiB
www.nyu.edu/etc.clientlibs/nyucore/clientlibs/clientlib-base.js15.2 KiB8.4 KiB
www.nyu.edu/etc.clientlibs/nyuwww/clientlibs/clientlib-base.js15.2 KiB8.4 KiB
www.nyu.edu/etc.clientlibs/nyuwww/clientlibs/clientlib-site.js21.1 KiB4.6 KiB
www.nyu.edu/etc.clientlibs/nyucore/clientlibs/clientlib-js-Modal.js12.2 KiB3.4 KiB

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: 6.2 s 1.1 MiB
URLTransfer SizeEst Savings
www.googletagmanager.com/gtm.js?id=GTM-5VD495202.1 KiB75.9 KiB
www.googletagmanager.com/gtag/js?id=G-H4KKXQKFSM&cx=c&gtm=4e64h1172.1 KiB69.1 KiB
www.googletagmanager.com/gtag/js?id=G-9CWXCZX89G&cx=c&gtm=4e64h1153.2 KiB64.6 KiB
www.googletagmanager.com/gtag/js?id=G-8Y5XM9YCFW&cx=c&gtm=4e64h1153.2 KiB64.6 KiB
www.googletagmanager.com/gtag/js?id=G-VR2BFTJ92R&cx=c&gtm=4e64h1153.2 KiB64.1 KiB
www.googletagmanager.com/gtag/js?id=AW-16640816000&cx=c&gtm=4e64h1136.6 KiB63.8 KiB
www.googletagmanager.com/gtag/js?id=AW-16834589110&cx=c&gtm=4e64h1136.6 KiB63.8 KiB
www.googletagmanager.com/gtag/js?id=G-YKLBDQJ61W&cx=c&gtm=4e64h1155.7 KiB63.8 KiB
www.googletagmanager.com/gtag/js?id=AW-16640712836&cx=c&gtm=4e64h1136.6 KiB63.8 KiB
www.googletagmanager.com/gtag/js?id=G-S194DLZYBD&cx=c&gtm=4e64h1155.0 KiB63.4 KiB
www.googletagmanager.com/gtag/js?id=AW-16640807666&cx=c&gtm=4e64h1136.6 KiB63.3 KiB
www.googletagmanager.com/gtag/js?id=G-S4TP6272FF&cx=c&gtm=4e64h1150.2 KiB63.3 KiB
cdn.cookielaw.org/scripttemplates/202501.2.0/otBannerSdk.js114.3 KiB62.9 KiB
www.googletagmanager.com/gtag/js?id=DC-4978807&cx=c&gtm=4e64h1129.4 KiB62.6 KiB
www.googletagmanager.com/gtag/js?id=DC-4097003&cx=c&gtm=4e64h1129.4 KiB62.6 KiB
www.googletagmanager.com/gtag/js?id=DC-4171739&cx=c&gtm=4e64h1129.4 KiB62.6 KiB
www.googletagmanager.com/gtag/js?id=DC-9284618&cx=c&gtm=4e64h1129.4 KiB62.6 KiB
cmp.osano.com/O0ob8QmY5Y/5d77d930-221b-4da2-b842-2f4fa04d53c2/osano.js71.6 KiB43.3 KiB
www.nyu.edu/etc.clientlibs/nyuwww/clientlibs/clientlib-js-index.js41.9 KiB29.5 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.nyu.edu/1.4 s11 ms2.8 ms
Unattributable1.0 s251 ms0.0 ms
www.googletagmanager.com/gtag/js?id=G-YKLBDQJ61W&cx=c&gtm=4e64h11.0 s883 ms49 ms
www.googletagmanager.com/gtm.js?id=GTM-5VD495947 ms845 ms69 ms
cmp.osano.com/O0ob8QmY5Y/5d77d930-221b-4da2-b842-2f4fa04d53c2/osano.js566 ms464 ms25 ms
www.googletagmanager.com/gtag/js?id=G-9CWXCZX89G&cx=c&gtm=4e64h1261 ms156 ms49 ms
www.nyu.edu/etc.clientlibs/nyucore/clientlibs/clientlib-site.js258 ms33 ms0.2 ms
www.googletagmanager.com/gtag/js?id=AW-16640807666&cx=c&gtm=4e64h1227 ms170 ms56 ms
www.googletagmanager.com/gtag/js?id=G-H4KKXQKFSM&cx=c&gtm=4e64h1224 ms159 ms62 ms
www.googletagmanager.com/gtag/js?id=G-S194DLZYBD&cx=c&gtm=4e64h1211 ms161 ms49 ms
www.googletagmanager.com/gtag/js?id=G-VR2BFTJ92R&cx=c&gtm=4e64h1199 ms155 ms41 ms
www.googletagmanager.com/gtag/js?id=G-8Y5XM9YCFW&cx=c&gtm=4e64h1195 ms151 ms42 ms
www.googletagmanager.com/gtag/js?id=DC-4978807&cx=c&gtm=4e64h1192 ms127 ms63 ms
cdn.cookielaw.org/scripttemplates/otSDKStub.js170 ms161 ms3.5 ms
www.googletagmanager.com/gtag/js?id=G-S4TP6272FF&cx=c&gtm=4e64h1169 ms129 ms39 ms
www.googletagmanager.com/gtag/js?id=DC-9284618&cx=c&gtm=4e64h1161 ms119 ms40 ms
www.googletagmanager.com/gtag/js?id=AW-16834589110&cx=c&gtm=4e64h1147 ms112 ms34 ms
www.googletagmanager.com/gtag/js?id=AW-16640816000&cx=c&gtm=4e64h1144 ms103 ms40 ms
www.nyu.edu/etc.clientlibs/nyuwww/clientlibs/clientlib-site.js138 ms72 ms0.5 ms
www.googletagmanager.com/gtag/js?id=AW-16640712836&cx=c&gtm=4e64h1129 ms99 ms30 ms
www.googletagmanager.com/gtag/js?id=DC-4171739&cx=c&gtm=4e64h1120 ms92 ms27 ms
cdn.cookielaw.org/scripttemplates/202501.2.0/otBannerSdk.js117 ms33 ms83 ms
www.googletagmanager.com/gtag/js?id=DC-4097003&cx=c&gtm=4e64h1108 ms80 ms27 ms
player.vimeo.com/api/player.js59 ms56 ms2.4 ms
www.nyu.edu/etc.clientlibs/nyuwww/clientlibs/clientlib-js-ajaxRequest.js52 ms26 ms0.1 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 Evaluation4.7 s
Style & Layout1.2 s
Other1.2 s
Script Parsing & Compilation869 ms
Garbage Collection171 ms
Rendering116 ms
Parse HTML & CSS100 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
The page has an unload handler in a sub frame.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 18.4 KiB
URLTransfer SizeEst Savings
20.8 KiB18.4 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
/exp=1776802008~acl=/60a4b4c1-337a-4c84-b4fe-3e060c356900...1.9 MiB
/exp=1776802008~acl=/60a4b4c1-337a-4c84-b4fe-3e060c356900...1.6 MiB
/exp=1776802008~acl=/60a4b4c1-337a-4c84-b4fe-3e060c356900...1.5 MiB
/exp=1776802008~acl=/60a4b4c1-337a-4c84-b4fe-3e060c356900...617.2 KiB
/etc.clientlibs/nyucore/clientlibs/clientlib-site/resourc...395.8 KiB
f.vimeocdn.com/p/4.46.41/js/player.module.js210.2 KiB
www.googletagmanager.com/gtm.js?id=GTM-5VD495202.5 KiB
www.googletagmanager.com/gtag/js?id=G-H4KKXQKFSM&cx=c&gtm=4e64h1172.1 KiB
www.googletagmanager.com/gtag/js?id=G-YKLBDQJ61W&cx=c&gtm=4e64h1155.8 KiB
www.googletagmanager.com/gtag/js?id=G-S194DLZYBD&cx=c&gtm=4e64h1155.0 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
ul > li > a > img ul > li > a > img
www.nyu.edu/content/dam/nyuwww/icons/facebook.svg
ul > li > a > img ul > li > a > img
www.nyu.edu/content/dam/nyuwww/icons/linkedin.svg
ul > li > a > img ul > li > a > img
www.nyu.edu/content/dam/nyuwww/icons/x.svg
ul > li > a > img ul > li > a > img
www.nyu.edu/content/dam/nyuwww/icons/instagram.svg
ul > li > a > img ul > li > a > img
www.nyu.edu/content/dam/nyuwww/icons/youtube.svg

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

●Layout shift culprits
●Optimize DOM size
●Modern HTTP
●Optimize viewport for mobile
●Minify CSS
●User Timing marks and measures 45 user timings
●Avoid long main-thread tasks 20 long tasks found
●Avoid non-composited animations 1 animated element found
●Network Requests
●Network Round Trip Times 100 ms
●Server Backend Latencies 130 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Initial server response time was short Root document took 30 ms
○INP breakdown
○LCP request discovery
○Avoid large layout shifts
92

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

Using ARIA attributes in roles where they are prohibited can mean that important information is not communicated to users of assistive technologies. Learn more about prohibited ARIA roles.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
NYU Women's Swimming and Diving Team Wins Its First-Ever National Championship div.aem-Grid > div.nyu-storytelling > div#nyu-storytelling-7b2c237681 > a.cmp-storytelling__link

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.

Names and labels

Informative elements should aim for short, descriptive alternate text. Decorative elements can be ignored with an empty alt attribute. Learn more about the `alt` attribute.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.cmp-publication-featured-stories__story > div.cmp-publication-featured-stories__story-inner > div.cmp-publication-featured-stories__image > img div.cmp-publication-featured-stories__story > div.cmp-publication-featured-stories__story-inner > div.cmp-publication-featured-stories__image > img

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.

Visible text labels that do not match the accessible name can result in a confusing experience for screen reader users. Learn more about accessible names.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Cookie Notice div.ot-sdk-eight > div#onetrust-policy > div#onetrust-policy-text > a.ot-cookie-policy-link
○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-*]` attributes match their roles
●`[aria-hidden="true"]` is not present on the document `<body>`
●`[role]`s have all required `[aria-*]` attributes
●`[role]` values are valid
●`[aria-*]` attributes have valid values
●`[aria-*]` attributes are valid and not misspelled
●Buttons have an accessible name
●`[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
●Elements with `role="dialog"` or `role="alertdialog"` have accessible names.
●`[aria-hidden="true"]` elements do not contain focusable descendents
●Background and foreground colors have a sufficient contrast ratio
●Document has a `<title>` element
●`<frame>` or `<iframe>` elements have a title
●`<html>` element has a `[lang]` attribute
●`<html>` element has a valid value for its `[lang]` attribute
●Links are distinguishable without relying on color.
●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.
●Deprecated ARIA roles were not used
●ARIA IDs are unique
○`[accesskey]` values are unique
○`button`, `link`, and `menuitem` elements have accessible names
○ARIA input fields have accessible names
○ARIA `meter` elements have accessible names
○ARIA `progressbar` elements have accessible names
○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
○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
○No form fields have multiple labels
○`<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
○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
○`<video>` elements contain a `<track>` element with `[kind="captions"]`
○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.
○Identical links have the same purpose.
○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.
96

Best Practices

General

Errors logged to the console indicate unresolved problems. They can come from network request failures and other browser concerns. Learn more about this errors in console diagnostic audit

Why this matters

Performance issues directly impact user engagement and conversion rates.

SourceDescription
www.nyu.edu/etc/cloudsettings/default/contexthub.kernel.js
Failed to load resource: the server responded with a status of 404 ()
www.nyu.edu/
Refused to execute script from 'https://www.nyu.edu/etc/cloudsettings/default/contexthub.kernel.js' because its MIME type ('text/html') is not executable, and strict MIME type checking is enabled.
●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 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 DOM-based XSS with Trusted Types
●Page has valid source maps
○Redirects HTTP traffic to HTTPS
○Mitigate clickjacking with XFO or CSP
○Detected JavaScript libraries
75

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.nyu.edu/privacyMore information

Informative elements should aim for short, descriptive alternate text. Decorative elements can be ignored with an empty alt attribute. Learn more about the `alt` attribute.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.cmp-publication-featured-stories__story > div.cmp-publication-featured-stories__story-inner > div.cmp-publication-featured-stories__image > img div.cmp-publication-featured-stories__story > div.cmp-publication-featured-stories__story-inner > div.cmp-publication-featured-stories__image > img

Canonical links suggest which URL to show in search results. Learn more about canonical links.

Why this matters

Informational: a Permissions-Policy directive showing feature -> allowed origins.

Source: MDN Permissions-Policy

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
●Document has a valid `hreflang`
○robots.txt is valid

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