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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.

19

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
d1zkbwgd2iyy9p.cloudfront.net/files/research-theme/images/213263170.jpg86400.0 s810.0 KiB
d1zkbwgd2iyy9p.cloudfront.net/files/research-theme/images/220889020.jpg86400.0 s200.5 KiB
d1zkbwgd2iyy9p.cloudfront.net/files/research-theme/images/137128250.jpg86400.0 s197.2 KiB
d1zkbwgd2iyy9p.cloudfront.net/files/research-theme/images/224449420.jpg86400.0 s177.6 KiB
/files/research-theme/images/future-security-653881644.jpg86400.0 s128.7 KiB
imagedepot.anu.edu.au/anu%20gateway/home-research-thumbnail.jpg0.0 ms43.2 KiB
imagedepot.anu.edu.au/anu%20gateway/home-postgrad-thumbnail.jpg0.0 ms43.0 KiB
cdn-au.onetrust.com/scripttemplates/202401.2.0/otBannerSdk.js86400.0 s104.5 KiB
imagedepot.anu.edu.au/anu%20gateway/home-international-thumbnail.jpg0.0 ms39.0 KiB
imagedepot.anu.edu.au/anu%20gateway/home-undergrad-thumbnail.jpg0.0 ms28.5 KiB
webstyle.anu.edu.au/_anu/images/icons/web/giving/icon-theme-transforming.png0.0 ms20.3 KiB
webstyle.anu.edu.au/_anu/images/icons/web/giving/icon-theme-advancing.png0.0 ms20.2 KiB
webstyle.anu.edu.au/_anu/images/icons/web/giving/icon-theme-leading.png0.0 ms20.1 KiB
www.anu.edu.au/files/2023-07/home-postgrad.jpg86400.0 s38.5 KiB
www.anu.edu.au/files/2023-07/home-undergrad.jpg86400.0 s35.0 KiB
/core/assets/vendor/jquery/jquery.min.js?v=4.0.0-rc.186400.0 s27.5 KiB
www.anu.edu.au/files/2023-07/home-postgrad-research.jpg86400.0 s26.6 KiB
www.anu.edu.au/files/2023-07/home-international.jpg86400.0 s24.0 KiB
/files/research-theme/images/culture_creativity_societies...86400.0 s20.6 KiB
imagedepot.anu.edu.au/isfs/microsite/apply/home-banner-icon.png0.0 ms7.9 KiB
cdn-au.onetrust.com/logos/static/ot_company_logo.png86400.0 s19.1 KiB
/scripttemplates/otSDKStub.js?did=0a85b331-d8d7-4979-a97e...86400.0 s8.9 KiB
imagedepot.anu.edu.au/anu%20gateway/bg-waves.svg0.0 ms1.3 KiB
cdn-au.onetrust.com/consent/0a85b331-d8d7-4979-a97e-aa69b819df86/OtAutoBlock.js86400.0 s3.1 KiB
cdn-au.onetrust.com/logos/static/powered_by_logo.svg86400.0 s2.6 KiB
imagedepot.anu.edu.au/anu%20gateway/lightgrey-blobs.svg0.0 ms908 B
imagedepot.anu.edu.au/anu%20gateway/Sui001-2-gold-104.svg0.0 ms889 B
imagedepot.anu.edu.au/anu%20gateway/Sui001-2-gold-099.svg0.0 ms860 B
imagedepot.anu.edu.au/anu%20gateway/Sui001-2-gold-106.svg0.0 ms824 B
imagedepot.anu.edu.au/anu%20gateway/right-arrow-with-bg.svg0.0 ms797 B
imagedepot.anu.edu.au/anu%20gateway/Sui001-2-gold-139.svg0.0 ms760 B
/sites/www.anu.edu.au/files/optimized/asset_injector/css/...86400.0 s1.0 KiB
/sites/www.anu.edu.au/files/optimized/asset_injector/css/...86400.0 s750 B
/sites/www.anu.edu.au/files/optimized/asset_injector/css/...86400.0 s537 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:0.7361179999999999] map[node:map[boundingRect:map[bottom:2099 height:1385 left:0 right:412 top:715 width:412] lhId:page-16-DIV nodeLabel:Study at ANU Search programs and courses Undergraduate students Postgraduate … path:1,HTML,1,BODY,2,DIV,0,DIV,4,MAIN,1,DIV,0,DIV,0,ARTICLE,0,DIV,4,DIV selector:div#block-webstyle-content > article > div > div.bg-blobs snippet:<div class="bg-blobs layout layout--onecol-12"> type:node] score:0.466376] map[node:map[boundingRect:map[bottom:6036 height:5807 left:0 right:412 top:229 width:412] lhId:page-14-MAIN nodeLabel:Apply for Semester 2, 2026: International student applications close 15 May App… path:1,HTML,1,BODY,2,DIV,0,DIV,4,MAIN selector:body.page-node-42886 > div.dialog-off-canvas-main-canvas > div.anu-bnr-wrap-1240 > main#main-content snippet:<main id="main-content" role="main"> type:node] score:0.209713] map[node:map[boundingRect:map[bottom:6036 height:5807 left:0 right:412 top:229 width:412] lhId:page-14-MAIN nodeLabel:Apply for Semester 2, 2026: International student applications close 15 May App… path:1,HTML,1,BODY,2,DIV,0,DIV,4,MAIN selector:body.page-node-42886 > div.dialog-off-canvas-main-canvas > div.anu-bnr-wrap-1240 > main#main-content snippet:<main id="main-content" role="main"> type:node] score:0.059738] map[node:map[boundingRect:map[bottom:1088 height:17 left:22 right:390 top:1071 width:368] lhId:page-11-P nodeLabel:Undergraduate students path:1,HTML,1,BODY,2,DIV,0,DIV,4,MAIN,1,DIV,0,DIV,0,ARTICLE,0,DIV,4,DIV,0,DIV,0,DIV,0,DIV,0,DIV,3,DIV,0,DIV,4,DIV,0,DIV,0,A,0,DIV,1,DIV,0,DIV,0,P selector:div.card-item-wrapper > div.text-overlay > div.overlay-content > p.h4 snippet:<p class="h4 "> type:node] score:0.000222] map[node:map[boundingRect:map[bottom:860 height:50 left:328 right:400 top:810 width:72] lhId:page-13-BUTTON nodeLabel:Search path:1,HTML,1,BODY,2,DIV,0,DIV,4,MAIN,1,DIV,0,DIV,0,ARTICLE,0,DIV,4,DIV,0,DIV,0,DIV,0,DIV,0,DIV,3,DIV,0,DIV,2,DIV,0,DIV,0,FORM,5,BUTTON selector:div.row > div.col-lg-10 > form#form1 > button#submitbutton snippet:<button class="searchbutton" id="submitbutton" aria-label="Search"> type:node] score:6.9e-05]]

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.

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
thumbnail image div.views-row > div.row > a.col-4 > img.w100px
d1zkbwgd2iyy9p.cloudfront.net/files/research-theme/images/213263170.jpg808.6 KiB801.1 KiB
thumbnail image div.views-row > div.row > a.col-4 > img.w100px
d1zkbwgd2iyy9p.cloudfront.net/files/research-theme/images/220889020.jpg199.8 KiB192.4 KiB
thumbnail image div.views-row > div.row > a.col-4 > img.w100px
d1zkbwgd2iyy9p.cloudfront.net/files/research-theme/images/137128250.jpg196.6 KiB189.1 KiB
thumbnail image div.views-row > div.row > a.col-4 > img.w100px
d1zkbwgd2iyy9p.cloudfront.net/files/research-theme/images/224449420.jpg176.9 KiB169.5 KiB
thumbnail image div.views-row > div.row > a.col-4 > img.w100px
/files/research-theme/images/future-security-653881644.jpg128.1 KiB119.6 KiB
banner div.anu-wf-rotator-rotator > div.band-black-wrap > div.overlap > img
/files/styles/anu_home_banner_band/public/2026-04/Intl ap...183.0 KiB102.5 KiB
news thumbnail image div.row > div.row > div.col-lg-8 > img.w100
/files/styles/anu_double_narrow_16_9/public/2026-03/honey...58.8 KiB26.6 KiB
thumbnail image div.views-row > div.row > a.col-4 > img.w100px
/files/research-theme/images/culture_creativity_societies...20.1 KiB16.8 KiB
a.nounderline > div.card-item-wrapper > div > img.w100 a.nounderline > div.card-item-wrapper > div > img.w100
imagedepot.anu.edu.au/anu%20gateway/home-research-thumbnail.jpg42.8 KiB10.0 KiB
a.nounderline > div.card-item-wrapper > div > img.w100 a.nounderline > div.card-item-wrapper > div > img.w100
imagedepot.anu.edu.au/anu%20gateway/home-postgrad-thumbnail.jpg42.6 KiB9.6 KiB
a.nounderline > div.card-item-wrapper > div > img.w100 a.nounderline > div.card-item-wrapper > div > img.w100
imagedepot.anu.edu.au/anu%20gateway/home-international-thumbnail.jpg38.6 KiB5.6 KiB

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:2721.603 label:Time to first byte subpart:timeToFirstByte] map[duration:5192.844 label:Resource load delay subpart:resourceLoadDelay] map[duration:813.998 label:Resource load duration subpart:resourceLoadDuration] map[duration:56.021 label:Element render delay subpart:elementRenderDelay]]
lhId: page-5-IMG
nodeLabel: banner
path: 1,HTML,1,BODY,2,DIV,0,DIV,4,MAIN,1,DIV,0,DIV,0,ARTICLE,0,DIV,2,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,SECTION,2,DIV,0,DIV,0,DIV,0,IMG
selector: div.anu-wf-rotator-rotator > div.band-black-wrap > div.overlap > img
snippet: <img loading="lazy" src="/files/styles/anu_home_banner_band/public/2026-04/Intl%20apply%20banner%20…" width="2000" height="600" alt="banner">

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-IMG
nodeLabel: banner
path: 1,HTML,1,BODY,2,DIV,0,DIV,4,MAIN,1,DIV,0,DIV,0,ARTICLE,0,DIV,2,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,SECTION,2,DIV,0,DIV,0,DIV,0,IMG
selector: div.anu-wf-rotator-rotator > div.band-black-wrap > div.overlap > img
snippet: <img loading="lazy" src="/files/styles/anu_home_banner_band/public/2026-04/Intl%20apply%20banner%20…" width="2000" height="600" alt="banner">

HTTP/2 and HTTP/3 offer many benefits over HTTP/1.1, such as multiplexing. Learn more about using modern HTTP.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLProtocol
www.anu.edu.au/http/1.1
www.anu.edu.au/files/2023-07/home-undergrad.jpghttp/1.1
www.anu.edu.au/files/2023-07/home-postgrad.jpghttp/1.1
www.anu.edu.au/files/2023-07/home-postgrad-research.jpghttp/1.1
www.anu.edu.au/files/2023-07/home-international.jpghttp/1.1
imagedepot.anu.edu.au/anu%20gateway/home-undergrad-thumbnail.jpghttp/1.1
imagedepot.anu.edu.au/anu%20gateway/home-postgrad-thumbnail.jpghttp/1.1
imagedepot.anu.edu.au/anu%20gateway/home-research-thumbnail.jpghttp/1.1
imagedepot.anu.edu.au/anu%20gateway/home-international-thumbnail.jpghttp/1.1
/files/styles/anu_double_narrow_16_9/public/2026-03/honey...http/1.1
imagedepot.anu.edu.au/anu%20gateway/right-arrow-with-bg.svghttp/1.1
imagedepot.anu.edu.au/isfs/microsite/apply/home-banner-icon.pnghttp/1.1
/files/styles/anu_double_narrow_16_9/public/research-them...http/1.1
/files/styles/anu_double_narrow_16_9/public/research-them...http/1.1
/files/styles/anu_double_narrow_16_9/public/research-them...http/1.1
/files/styles/anu_double_narrow_16_9/public/research-them...http/1.1
/files/styles/anu_double_narrow_16_9/public/research-them...http/1.1
/files/styles/anu_double_narrow_16_9/public/research-them...http/1.1
imagedepot.anu.edu.au/anu%20gateway/Sui001-2-gold-139.svghttp/1.1
imagedepot.anu.edu.au/anu%20gateway/Sui001-2-gold-099.svghttp/1.1
imagedepot.anu.edu.au/anu%20gateway/Sui001-2-gold-104.svghttp/1.1
imagedepot.anu.edu.au/anu%20gateway/Sui001-2-gold-106.svghttp/1.1
imagedepot.anu.edu.au/anu%20gateway/lightgrey-blobs.svghttp/1.1
imagedepot.anu.edu.au/anu%20gateway/bg-waves.svghttp/1.1
/files/styles/anu_home_banner_band/public/2026-04/Intl ap...http/1.1

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
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
d1blp3aor2iuhp.cloudfront.net/styles/css/utilities/overlap.css1.0 KiB
d1blp3aor2iuhp.cloudfront.net/styles/css/export.css3.4 KiB1.8 s
d1blp3aor2iuhp.cloudfront.net/styles/css/utilities/bands.css2.3 KiB
d1blp3aor2iuhp.cloudfront.net/styles/css/utilities/error.css905 B
d1blp3aor2iuhp.cloudfront.net/styles/css/utilities/normalise.css520 B208 ms
d1blp3aor2iuhp.cloudfront.net/styles/css/utilities/global.css2.0 KiB
d1blp3aor2iuhp.cloudfront.net/styles/css/utilities/tags.css647 B
d1blp3aor2iuhp.cloudfront.net/styles/css/widgets/search.css1.6 KiB
d1blp3aor2iuhp.cloudfront.net/styles/css/widgets/social-banner.css577 B
d1blp3aor2iuhp.cloudfront.net/styles/css/override.css697 B
d1blp3aor2iuhp.cloudfront.net/styles/css/utilities/shadow.css627 B
d1blp3aor2iuhp.cloudfront.net/styles/css/utilities/list.css1.3 KiB
d1blp3aor2iuhp.cloudfront.net/styles/css/utilities/pagetabs.css1.9 KiB
d1blp3aor2iuhp.cloudfront.net/styles/css/utilities/ratio.css584 B
d1blp3aor2iuhp.cloudfront.net/styles/css/widgets/chat-bot.css1.8 KiB208 ms
d1blp3aor2iuhp.cloudfront.net/styles/css/utilities/type.css1.4 KiB
d1blp3aor2iuhp.cloudfront.net/styles/css/widgets/cookies-banner.css760 B
d1blp3aor2iuhp.cloudfront.net/styles/css/utilities/spacing.css2.3 KiB
d1blp3aor2iuhp.cloudfront.net/styles/css/utilities/carousel.css826 B
d1blp3aor2iuhp.cloudfront.net/styles/css/utilities/maps.css783 B
d1blp3aor2iuhp.cloudfront.net/styles/css/components/rotator.css793 B
d1blp3aor2iuhp.cloudfront.net/libs/bootstrap/css/bootstrap-grid.min.css7.0 KiB208 ms
d1blp3aor2iuhp.cloudfront.net/styles/css/components/navigation.css1.8 KiB
d1blp3aor2iuhp.cloudfront.net/styles/css/components/footer.css2.1 KiB
d1blp3aor2iuhp.cloudfront.net/styles/css/components/slider.css1.3 KiB
d1blp3aor2iuhp.cloudfront.net/styles/css/components/heroslider.css959 B
d1blp3aor2iuhp.cloudfront.net/libs/bootstrap/css/bootstrap-carousel.min.css1.8 KiB
d1blp3aor2iuhp.cloudfront.net/styles/css/utilities/accordion.css876 B
d1blp3aor2iuhp.cloudfront.net/styles/css/utilities/sizing.css3.2 KiB
d1blp3aor2iuhp.cloudfront.net/styles/css/utilities/borders.css1.1 KiB
d1blp3aor2iuhp.cloudfront.net/styles/css/utilities/testimonials.css743 B
d1blp3aor2iuhp.cloudfront.net/styles/css/utilities/images.css921 B
d1blp3aor2iuhp.cloudfront.net/styles/css/utilities/dividers.css747 B
d1blp3aor2iuhp.cloudfront.net/styles/css/utilities/dateblock.css1.2 KiB
d1blp3aor2iuhp.cloudfront.net/styles/css/utilities/responsiveness.css512 B
d1blp3aor2iuhp.cloudfront.net/styles/css/utilities/forms.css2.1 KiB
d1blp3aor2iuhp.cloudfront.net/styles/css/utilities/badges.css693 B
d1blp3aor2iuhp.cloudfront.net/styles/css/components/map.css1.3 KiB
d1blp3aor2iuhp.cloudfront.net/styles/css/utilities/scroll.css614 B
d1blp3aor2iuhp.cloudfront.net/styles/css/utilities/pager.css965 B
d1blp3aor2iuhp.cloudfront.net/styles/css/utilities/cards.css1.5 KiB
d1blp3aor2iuhp.cloudfront.net/styles/css/utilities/tables.css1.2 KiB
d1blp3aor2iuhp.cloudfront.net/styles/css/utilities/buttons.css2.4 KiB
d1blp3aor2iuhp.cloudfront.net/styles/css/components/header.css1.0 KiB
d1blp3aor2iuhp.cloudfront.net/styles/css/components/breadcrumb.css846 B
d1blp3aor2iuhp.cloudfront.net/styles/css/utilities/animations.css771 B208 ms
d1blp3aor2iuhp.cloudfront.net/styles/css/utilities/links.css692 B
/css2?family=Public+Sans:ital,wght@0,100;0,200;0,300;0,40...938 B151 ms
fonts.googleapis.com/css?family=Roboto:300,4002.0 KiB784 ms
cdn-au.onetrust.com/consent/0a85b331-d8d7-4979-a97e-aa69b819df86/OtAutoBlock.js3.1 KiB784 ms
/sites/www.anu.edu.au/files/optimized/asset_injector/css/...537 B
/sites/www.anu.edu.au/files/optimized/asset_injector/css/...1.0 KiB
/sites/www.anu.edu.au/files/optimized/asset_injector/css/...750 B
/sites/www.anu.edu.au/files/optimized/css/css_0okYZi3YM_D...8.4 KiB303 ms
/sites/www.anu.edu.au/files/optimized/css/css_lCHamYzMU2W...1.1 KiB767 ms
cdnjs.cloudflare.com/ajax/libs/font-awesome/6.5.2/css/all.min.css19.2 KiB1.2 s

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
cdnjs.cloudflare.com/ajax/libs/font-awesome/6.5.2/webfonts/fa-solid-900.woff220 ms
cdnjs.cloudflare.com/ajax/libs/font-awesome/6.5.2/webfonts/fa-brands-400.woff215 ms

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: 1.5 s
URLTime Spent
anu.edu.au/1.5 s
www.anu.edu.au/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
Study at ANU Search programs and courses Undergraduate students Postgraduate … div#block-webstyle-content > article > div > div.bg-blobs
0.466
Apply for Semester 2, 2026: International student applications close 15 May App… body.page-node-42886 > div.dialog-off-canvas-main-canvas > div.anu-bnr-wrap-1240 > main#main-content
0.210
Apply for Semester 2, 2026: International student applications close 15 May App… body.page-node-42886 > div.dialog-off-canvas-main-canvas > div.anu-bnr-wrap-1240 > main#main-content
0.060
Undergraduate students div.card-item-wrapper > div.text-overlay > div.overlay-content > p.h4
0.000
Search div.row > div.col-lg-10 > form#form1 > button#submitbutton
0.000

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

Minifying CSS files can reduce network payload sizes. Learn how to minify CSS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 40 ms 4.6 KiB
URLTransfer SizeEst Savings
d1blp3aor2iuhp.cloudfront.net/libs/bootstrap/css/bootstrap-grid.min.css7.0 KiB4.6 KiB

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: 210 ms 36.3 KiB
URLTransfer SizeEst Savings
cdnjs.cloudflare.com/ajax/libs/font-awesome/6.5.2/css/all.min.css18.5 KiB18.2 KiB
#onetrust-banner-sdk{-ms-text-size-adjust:100%;-webkit-text-size-adjust:100%} …20.4 KiB18.0 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: 1.2 s 230.6 KiB
URLTransfer SizeEst Savings
www.googletagmanager.com/gtag/js?id=G-E1GV4NJHV2&cx=c&gtm=4e64h1178.7 KiB69.3 KiB
www.googletagmanager.com/gtm.js?id=GTM-5H3R8L186.2 KiB59.1 KiB
cdn-au.onetrust.com/scripttemplates/202401.2.0/otBannerSdk.js104.3 KiB54.3 KiB
d1blp3aor2iuhp.cloudfront.net/widgets/bundle.js61.4 KiB26.6 KiB
/core/assets/vendor/jquery/jquery.min.js?v=4.0.0-rc.127.0 KiB21.3 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
Unattributable840 ms107 ms0.0 ms
www.anu.edu.au/602 ms11 ms2.1 ms
www.googletagmanager.com/gtm.js?id=GTM-5H3R8L541 ms433 ms82 ms
www.googletagmanager.com/gtag/js?id=G-E1GV4NJHV2&cx=c&gtm=4e64h1461 ms383 ms73 ms
cdn-au.onetrust.com/scripttemplates/202401.2.0/otBannerSdk.js260 ms166 ms52 ms
d1blp3aor2iuhp.cloudfront.net/widgets/bundle.js182 ms152 ms26 ms
d1blp3aor2iuhp.cloudfront.net/widgets/429.bundle.js126 ms110 ms4.5 ms
cdn-au.onetrust.com/consent/0a85b331-d8d7-4979-a97e-aa69b819df86/OtAutoBlock.js62 ms48 ms1.4 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 Evaluation1.6 s
Other884 ms
Style & Layout372 ms
Script Parsing & Compilation288 ms
Rendering158 ms
Parse HTML & CSS139 ms
Garbage Collection66 ms

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
d1zkbwgd2iyy9p.cloudfront.net/files/research-theme/images/213263170.jpg810.0 KiB
d1zkbwgd2iyy9p.cloudfront.net/files/research-theme/images/220889020.jpg200.5 KiB
d1zkbwgd2iyy9p.cloudfront.net/files/research-theme/images/137128250.jpg197.2 KiB
www.googletagmanager.com/gtm.js?id=GTM-5H3R8L186.6 KiB
/files/styles/anu_home_banner_band/public/2026-04/Intl ap...183.4 KiB
www.googletagmanager.com/gtag/js?id=G-E1GV4NJHV2&cx=c&gtm=4e64h1178.7 KiB
d1zkbwgd2iyy9p.cloudfront.net/files/research-theme/images/224449420.jpg177.6 KiB
/files/styles/anu_double_narrow_440x248/public/2026-04/Ni...166.1 KiB
cdnjs.cloudflare.com/ajax/libs/font-awesome/6.5.2/webfonts/fa-solid-900.woff2153.5 KiB
/files/research-theme/images/future-security-653881644.jpg128.7 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
Research icon div.field > div.ml-n-5 > div.mt-0 > img.w100px
imagedepot.anu.edu.au/isfs/microsite/apply/home-banner-icon.png
Group of Eight Member div.anu-row > div.anu-col-12 > a.anu-wf-a > img.anu-wf-img
d1blp3aor2iuhp.cloudfront.net/images/logos/logo-GroupOfEight.svg
The Australian National University div.col-lg-auto > div.anu-wf-header-logo > a > img.logo
d1blp3aor2iuhp.cloudfront.net/images/logos/logo-ANU-black.svg
The Australian National University div.anu-col > div.anu-row > div.anu-col-lg-4 > img.anu-wf-img
d1blp3aor2iuhp.cloudfront.net/images/logos/logo-ANU.svg
teamwork icon div.row > div.col-lg-12 > a.d-block > img.absmiddle
imagedepot.anu.edu.au/anu%20gateway/Sui001-2-gold-104.svg
APRU div.anu-row > div.anu-col-12 > a.anu-wf-a > img.anu-wf-img
d1blp3aor2iuhp.cloudfront.net/images/logos/logo-APRU.svg
trophy icon div.row > div.col-lg-12 > a.d-block > img.absmiddle
imagedepot.anu.edu.au/anu%20gateway/Sui001-2-gold-099.svg
cursor icon div.row > div.col-lg-12 > a.d-block > img.absmiddle
imagedepot.anu.edu.au/anu%20gateway/Sui001-2-gold-139.svg
chat icon div.row > div.col-lg-12 > a.d-block > img.absmiddle
imagedepot.anu.edu.au/anu%20gateway/Sui001-2-gold-106.svg
IARU div.anu-row > div.anu-col-12 > a.anu-wf-a > img.anu-wf-img
d1blp3aor2iuhp.cloudfront.net/images/logos/logo-IARU.svg
icon-arrow-up-solid footer.anu-wf-footer > div.anu-container > a#btn-back-to-top > img.anu-wf-img
d1blp3aor2iuhp.cloudfront.net/images/icons/icon-arrow-up-solid.svg
read more icon div.col-lg-3 > div.w100 > div.px-3 > img.w64px
imagedepot.anu.edu.au/anu%20gateway/right-arrow-with-bg.svg

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

●Optimize DOM size
●Forced reflow
●Optimize viewport for mobile
●Minify JavaScript
●User Timing marks and measures 5 user timings
●Avoid long main-thread tasks 14 long tasks found
●Page didn't prevent back/forward cache restoration
●Network Requests
●Network Round Trip Times 260 ms
●Server Backend Latencies 890 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Initial server response time was short Root document took 200 ms
○INP breakdown
○Avoid non-composited animations
97

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.

Best practices

Touch targets with sufficient size and spacing help users who may have difficulty targeting small controls to activate the targets. Learn more about touch targets.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Contact ANU div.anu-row > div.anu-col > p.anu-wf-p > a.anu-wf-a
Copyright div.anu-row > div.anu-col > p.anu-wf-p > a.anu-wf-a
Disclaimer div.anu-row > div.anu-col > p.anu-wf-p > a.anu-wf-a
Privacy div.anu-row > div.anu-col > p.anu-wf-p > a.anu-wf-a
Freedom of Information div.anu-row > div.anu-col > p.anu-wf-p > a.anu-wf-a
Accessibility div.anu-row > div.anu-col > p.anu-wf-p > a.anu-wf-a

These items highlight common accessibility best practices.

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
Read more div#onetrust-group-container > 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
●Image elements have `[alt]` attributes
●Form elements have associated labels
●`[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
●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 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
●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
●Identical links have the same purpose.
○`[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
○`<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
○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.
○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 DOM-based XSS with Trusted Types
●Detected JavaScript libraries
●Page has valid source maps
○Redirects HTTP traffic to HTTPS
○Mitigate clickjacking with XFO or CSP
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
/news/all-news/scientists-rescue-the-lost-song-of-the-cri...Read more
research.anu.edu.au/Learn more
policies.anu.edu.au/ppl/document/ANUP_010007Read 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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