Lighthouse Desktop

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

SCORE

GRADE

FIX

REVIEW

PASS

INFO

Detailed Report

Audit breakdown by category with detailed findings.

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.

Request	Cache TTL	Transfer Size
www.darpa.mil/sites/default/files/gallery/2025-10/arpanet-napkin-4.png	0.0 ms	1.7 MiB
www.darpa.mil/themes/custom/darpa_uswds/assets/dist/js/navbar.bundle.js?tdvso6	0.0 ms	857.4 KiB
/sites/default/files/css/css_5LiDfqPo9pjLoZYsLdmDjEvoQX8D...	0.0 ms	681.0 KiB
/themes/custom/darpa_uswds/assets/dist/js/contact_form_v2...	0.0 ms	376.7 KiB
/themes/custom/darpa_uswds/assets/dist/img/components/foo...	0.0 ms	364.9 KiB
/sites/default/files/styles/top_tabs_content_panel/public...	0.0 ms	342.8 KiB
www.darpa.mil/sites/default/files/gallery/2024-11/javelin-tank-breaker.jpg	0.0 ms	332.0 KiB
/sites/default/files/gallery/2025-11/nomars-home-page-her...	0.0 ms	330.3 KiB
/sites/default/files/gallery/2025-11/darpa-spotlight-live...	0.0 ms	308.9 KiB
www.darpa.mil/themes/custom/darpa_uswds/assets/dist/js/carousel.bundle.js?tdvso6	0.0 ms	193.4 KiB
/themes/custom/darpa_uswds/assets/dist/js/recent_news.bun...	0.0 ms	171.3 KiB
www.darpa.mil/themes/custom/darpa_uswds/logo.svg	0.0 ms	158.6 KiB
/themes/custom/darpa_uswds/assets/dist/img/components/col...	0.0 ms	153.2 KiB
/themes/custom/darpa_uswds/assets/js/react/18_3_1/react-d...	0.0 ms	130.1 KiB
i.ytimg.com/vi/3tBE8qQl49g/maxresdefault.jpg	7200.0 s	127.2 KiB
/sites/default/files/styles/top_tabs_content_panel/public...	0.0 ms	92.3 KiB
www.darpa.mil/core/assets/vendor/jquery/jquery.min.js?v=3.7.1	0.0 ms	86.8 KiB
/themes/custom/darpa_uswds/assets/js/sdk/aws_v2/apiGatewa...	0.0 ms	68.8 KiB
/themes/custom/darpa_uswds/assets/dist/img/components/foo...	0.0 ms	67.1 KiB
www.darpa.mil/core/misc/ajax.js?v=10.6.3	0.0 ms	66.2 KiB
/sites/default/files/styles/upcoming_events_slide/public/...	0.0 ms	63.2 KiB
/themes/custom/darpa_uswds/assets/dist/js/podcast_player....	0.0 ms	61.9 KiB
/themes/custom/darpa_uswds/assets/dist/js/upcoming_events...	0.0 ms	56.5 KiB
/themes/custom/darpa_uswds/assets/js/assets/DARPA_Draft_L...	0.0 ms	29.1 KiB
/sites/default/files/styles/recent_news/public/gallery/20...	0.0 ms	28.9 KiB
www.darpa.mil/themes/custom/darpa_uswds/assets/dist/js/top_tabs.bundle.js?tdvso6	0.0 ms	28.2 KiB
/themes/custom/darpa_uswds/assets/js/sdk/aws_v2/apiGatewa...	0.0 ms	23.4 KiB
www.darpa.mil/core/misc/drupal.js?v=10.6.3	0.0 ms	21.8 KiB
/themes/custom/darpa_uswds/assets/dist/fonts/source-sans-...	0.0 ms	21.3 KiB
/themes/custom/darpa_uswds/assets/dist/fonts/source-sans-...	0.0 ms	21.1 KiB
/themes/custom/darpa_uswds/assets/dist/js/site_modal.bund...	0.0 ms	19.4 KiB
/sites/default/files/styles/medium_office_card_426x160/pu...	0.0 ms	16.7 KiB
/sites/default/files/styles/medium_office_card_426x160/pu...	0.0 ms	14.8 KiB
/themes/custom/darpa_uswds/assets/js/sdk/aws_v2/apiGatewa...	0.0 ms	14.1 KiB
/sites/default/files/styles/medium_office_card_426x160/pu...	0.0 ms	13.7 KiB
/themes/custom/darpa_uswds/assets/dist/img/components/foo...	0.0 ms	13.2 KiB
/sites/default/files/styles/medium_office_card_426x160/pu...	0.0 ms	13.1 KiB
/themes/custom/darpa_uswds/assets/js/react/18_3_1/react.p...	0.0 ms	11.7 KiB
/sites/default/files/styles/recent_news/public/gallery/20...	0.0 ms	11.1 KiB
/sites/default/files/styles/medium_office_card_426x160/pu...	0.0 ms	9.9 KiB
/themes/custom/darpa_uswds/assets/js/sdk/aws_v2/apiGatewa...	0.0 ms	9.5 KiB
www.darpa.mil/core/misc/message.js?v=10.6.3	0.0 ms	9.5 KiB
/Universal-Federated-Analytics-Min.js?agency=DOD&subagenc...	0.0 ms	9.4 KiB
/themes/custom/darpa_uswds/assets/js/sdk/aws_v2/apiGatewa...	0.0 ms	7.4 KiB
www.darpa.mil/core/assets/vendor/tabbable/index.umd.min.js?v=6.3.0	0.0 ms	7.2 KiB
/sites/default/files/styles/recent_news/public/gallery/20...	0.0 ms	6.4 KiB
www.darpa.mil/core/misc/progress.js?v=10.6.3	0.0 ms	6.3 KiB
/sites/default/files/css/css_dHTSnv6R-NO3oLg2P0KNnvo0vksx...	0.0 ms	6.3 KiB
/sites/default/files/styles/medium_office_card_426x160/pu...	0.0 ms	6.3 KiB
/themes/custom/darpa_uswds/assets/js/sdk/aws_v2/apiGatewa...	0.0 ms	6.2 KiB
www.darpa.mil/core/misc/announce.js?v=10.6.3	0.0 ms	5.4 KiB
/themes/custom/darpa_uswds/assets/js/sdk/aws_v2/apiGatewa...	0.0 ms	4.9 KiB
/themes/custom/darpa_uswds/assets/js/sdk/aws_v2/apiGatewa...	0.0 ms	4.8 KiB
dap.digitalgov.gov/web-vitals/dist/web-vitals.attribution.iife.js	0.0 ms	4.5 KiB
/themes/custom/darpa_uswds/assets/js/sdk/aws_v2/apiGatewa...	0.0 ms	4.1 KiB
/themes/custom/darpa_uswds/assets/js/sdk/aws_v2/apiGatewa...	0.0 ms	3.8 KiB
/themes/custom/darpa_uswds/assets/js/sdk/aws_v2/apiGatewa...	0.0 ms	3.6 KiB
/themes/custom/darpa_uswds/assets/dist/img/components/foo...	0.0 ms	3.3 KiB
/themes/custom/darpa_uswds/assets/js/packages/usa_banner/...	0.0 ms	3.1 KiB
www.darpa.mil/core/assets/vendor/loadjs/loadjs.min.js?v=4.3.0	0.0 ms	3.0 KiB
/themes/custom/darpa_uswds/assets/dist/img/components/foo...	0.0 ms	3.0 KiB
www.darpa.mil/sites/default/files/2024-08/Group%2028418.svg	0.0 ms	2.8 KiB
/themes/custom/darpa_uswds/assets/dist/img/components/foo...	0.0 ms	2.7 KiB
www.darpa.mil/core/misc/debounce.js?v=10.6.3	0.0 ms	2.6 KiB
www.darpa.mil/core/assets/vendor/once/once.min.js?v=1.0.1	0.0 ms	2.5 KiB
www.darpa.mil/modules/contrib/google_tag/js/gtag.js?tdvso6	0.0 ms	2.5 KiB
www.darpa.mil/sites/default/files/2024-08/Small%20Business_icon.svg	0.0 ms	2.5 KiB
www.darpa.mil/modules/contrib/google_tag/js/gtm.js?tdvso6	0.0 ms	2.4 KiB
www.darpa.mil/sites/default/files/2024-08/Media%20and%20Reporters%20Icon.svg	0.0 ms	2.4 KiB
/themes/custom/darpa_uswds/assets/dist/img/components/foo...	0.0 ms	2.3 KiB
www.darpa.mil/sites/default/files/2024-08/universities_icon.svg	0.0 ms	2.3 KiB
/themes/custom/darpa_uswds/assets/dist/img/components/ima...	0.0 ms	2.1 KiB
/themes/custom/darpa_uswds/assets/dist/img/components/ima...	0.0 ms	2.1 KiB
www.darpa.mil/core/misc/drupal.init.js?v=10.6.3	0.0 ms	2.1 KiB
/sites/default/files/2024-08/Commercialization Partners i...	0.0 ms	2.1 KiB
www.darpa.mil/sites/default/files/2024-08/Defense%20and%20Government%20icon.svg	0.0 ms	2.1 KiB
/themes/custom/darpa_uswds/assets/js/packages/usa_banner/...	0.0 ms	1.9 KiB
www.darpa.mil/core/misc/drupalSettingsLoader.js?v=10.6.3	0.0 ms	1.9 KiB
/themes/custom/darpa_uswds/assets/dist/img/components/foo...	0.0 ms	1.8 KiB
/themes/custom/darpa_uswds/assets/dist/img/components/foo...	0.0 ms	1.8 KiB
/themes/custom/darpa_uswds/assets/js/packages/usa_banner/...	0.0 ms	1.8 KiB
www.darpa.mil/modules/contrib/google_tag/js/gtag.ajax.js?tdvso6	0.0 ms	1.7 KiB
/themes/custom/darpa_uswds/assets/dist/img/usa-icons-bg/s...	0.0 ms	1.5 KiB
www.darpa.mil/themes/contrib/stable/js/ajax.js?v=10.6.3	0.0 ms	1.5 KiB
/themes/custom/darpa_uswds/assets/js/packages/usa_banner/...	0.0 ms	1.4 KiB
www.darpa.mil/themes/custom/darpa_uswds/assets/dist/img/usa-icons/close.svg	0.0 ms	1.4 KiB
/themes/custom/darpa_uswds/assets/dist/img/usa-icons/expa...	0.0 ms	1.3 KiB
static.doubleclick.net/instream/ad_status.js	900.0 s	495 B
www.gstatic.com/recaptcha/api2/logo_48.png	604800.0 s	2.3 KiB
static.doubleclick.net/instream/ad_status.js	900.0 s	0 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:1.12299] map[node:map[boundingRect:map[bottom:6358 height:6328 left:0 right:1350 top:30 width:1350] lhId:page-2-MAIN nodeLabel:TRANSFORM NAPKIN SKETCHES INTO World-Changing Technologies Work with DARPA … path:1,HTML,1,BODY,2,DIV,0,DIV,3,MAIN selector:body.page-front > div.dialog-off-canvas-main-canvas > div.layout-container > main snippet:<main role="main"> type:node] score:0.968085] map[node:map[boundingRect:map[bottom:6358 height:5501 left:0 right:1350 top:857 width:1350] lhId:page-3-SECTION nodeLabel:Events All Events DARPAConnect Mission Connect: Michigan This one-day event, o… path:1,HTML,1,BODY,2,DIV,0,DIV,3,MAIN,2,SECTION selector:div.dialog-off-canvas-main-canvas > div.layout-container > main > section.usa-section snippet:<section class="usa-section padding-top-0"> type:node] score:0.078382] map[node:map[boundingRect:map[bottom:2380 height:674 left:0 right:1350 top:1706 width:1350] lhId:page-4-DIV nodeLabel:Latest from DARPA RACER | 360° video Live Chain Podcast | Ep 92 Ride along with… path:1,HTML,1,BODY,2,DIV,0,DIV,3,MAIN,2,SECTION,1,DIV,0,DIV,0,DIV,0,ARTICLE,0,DIV,0,DIV,1,DIV,0,DIV,0,DIV selector:div.field > div.field__item > div.content-width-x-large > div.grid-col-fill snippet:<div class="grid-col-fill"> type:node] score:0.074393] map[score:0.00213]]

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.

URL	Est Savings
/themes/custom/darpa_uswds/assets/dist/fonts/source-sans-...	65 ms
/themes/custom/darpa_uswds/assets/dist/fonts/source-sans-...	60 ms
fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBA.woff2	15 ms
fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2	10 ms
fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2	10 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:Source valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]

items: [map[reflowTime:180.073 source:map[type:text value:[unattributed]]] map[reflowTime:1.515 source:map[column:380 line:580 type:source-location url:https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js urlProvider:network]] map[reflowTime:2.435 source:map[column:47 line:303 type:source-location url:https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js urlProvider:network]]]

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-0-DIV

nodeLabel: OUR MISSIONCreate Technological Surprise for National Security R&D Opportunities

path: 1,HTML,1,BODY,2,DIV,0,DIV,3,MAIN,1,SECTION,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV

selector: div#react-carousel > div#carousel-front-page > div.carousel-inner > div.carousel-item

snippet: <div class=" carousel-item" style="background: url("https://www.darpa.mil/sites/default/files/gallery/2024-11…");">

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.

URL	Transfer Size	Duration
/sites/default/files/css/css_5LiDfqPo9pjLoZYsLdmDjEvoQX8D...	681.0 KiB	575 ms
/sites/default/files/css/css_dHTSnv6R-NO3oLg2P0KNnvo0vksx...	6.3 KiB
www.darpa.mil/modules/contrib/google_tag/js/gtm.js?tdvso6	2.4 KiB
/css2?family=Inter:ital,opsz,wght@0,14..32,100..900;1,14....	1.1 KiB	215 ms
www.darpa.mil/modules/contrib/google_tag/js/gtag.js?tdvso6	2.5 KiB
www.darpa.mil/core/misc/drupalSettingsLoader.js?v=10.6.3	1.9 KiB

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.

	URL	Resource Size	Est Savings
	www.darpa.mil/sites/default/files/gallery/2025-10/arpanet-napkin-4.png	1.7 MiB	1.5 MiB
	/sites/default/files/styles/top_tabs_content_panel/public...	341.2 KiB	299.1 KiB
	/sites/default/files/gallery/2025-11/darpa-spotlight-live...	307.3 KiB	167.3 KiB
	/sites/default/files/gallery/2025-11/nomars-home-page-her...	328.8 KiB	166.2 KiB
	/sites/default/files/styles/top_tabs_content_panel/public...	91.0 KiB	49.4 KiB
darpa-connect-2024 `div.upcoming-events-slide > div.row > div.padding-bottom-2 > img.image-style-upcoming-events-slide`	/sites/default/files/styles/upcoming_events_slide/public/...	61.9 KiB	31.5 KiB
DARPA logo `ul.flex > li > a.text-3xl > img.min-w-[100px]`	/themes/custom/darpa_uswds/assets/js/assets/DARPA_Draft_L...	27.9 KiB	25.8 KiB
bio-attribution-challenge `a.news-container-link > div.mb-3 > div.news-media > img.image-style-recent-news`	/sites/default/files/styles/recent_news/public/gallery/20...	27.7 KiB	21.0 KiB
div.grid-row > div.desktop:grid-col > div.technical-offices-card > img.img-round-corner `div.grid-row > div.desktop:grid-col > div.technical-offices-card > img.img-round-corner`	/sites/default/files/styles/medium_office_card_426x160/pu...	15.5 KiB	5.7 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: 465 ms

URL	Time Spent
darpa.mil/	465 ms
www.darpa.mil/	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.

Element	Layout shift score
TRANSFORM NAPKIN SKETCHES INTO World-Changing Technologies Work with DARPA … `body.page-front > div.dialog-off-canvas-main-canvas > div.layout-container > main`	0.968
Events All Events DARPAConnect Mission Connect: Michigan This one-day event, o… `div.dialog-off-canvas-main-canvas > div.layout-container > main > section.usa-section`	0.078
Latest from DARPA RACER \| 360° video Live Chain Podcast \| Ep 92 Ride along with… `div.field > div.field__item > div.content-width-x-large > div.grid-col-fill`	0.074
	0.002

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

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: 1.3 s 1.6 MiB

URL	Transfer Size	Est Savings
www.darpa.mil/themes/custom/darpa_uswds/assets/dist/js/navbar.bundle.js?tdvso6	855.3 KiB	818.4 KiB
/themes/custom/darpa_uswds/assets/dist/js/contact_form_v2...	375.1 KiB	310.5 KiB
www.darpa.mil/themes/custom/darpa_uswds/assets/dist/js/carousel.bundle.js?tdvso6	192.0 KiB	157.8 KiB
/themes/custom/darpa_uswds/assets/dist/js/recent_news.bun...	169.9 KiB	127.0 KiB
www.darpa.mil/core/misc/ajax.js?v=10.6.3	65.0 KiB	45.6 KiB
/themes/custom/darpa_uswds/assets/dist/js/podcast_player....	60.6 KiB	41.6 KiB
/themes/custom/darpa_uswds/assets/dist/js/upcoming_events...	55.2 KiB	39.1 KiB
/themes/custom/darpa_uswds/assets/js/sdk/aws_v2/apiGatewa...	67.5 KiB	31.0 KiB
www.darpa.mil/themes/custom/darpa_uswds/assets/dist/js/top_tabs.bundle.js?tdvso6	27.0 KiB	18.4 KiB
/themes/custom/darpa_uswds/assets/js/sdk/aws_v2/apiGatewa...	22.2 KiB	16.4 KiB
www.darpa.mil/core/misc/drupal.js?v=10.6.3	20.6 KiB	16.2 KiB
/themes/custom/darpa_uswds/assets/dist/js/site_modal.bund...	18.2 KiB	13.9 KiB
/themes/custom/darpa_uswds/assets/js/sdk/aws_v2/apiGatewa...	12.9 KiB	6.1 KiB
www.darpa.mil/core/misc/message.js?v=10.6.3	8.2 KiB	5.5 KiB
www.darpa.mil/core/misc/progress.js?v=10.6.3	5.1 KiB	3.3 KiB
www.darpa.mil/core/misc/announce.js?v=10.6.3	4.2 KiB	3.2 KiB
/themes/custom/darpa_uswds/assets/js/sdk/aws_v2/apiGatewa...	5.0 KiB	3.1 KiB
/themes/custom/darpa_uswds/assets/js/sdk/aws_v2/apiGatewa...	8.3 KiB	2.8 KiB
/themes/custom/darpa_uswds/assets/js/sdk/aws_v2/apiGatewa...	3.6 KiB	2.6 KiB
/themes/custom/darpa_uswds/assets/js/sdk/aws_v2/apiGatewa...	6.2 KiB	2.4 KiB
/themes/custom/darpa_uswds/assets/js/sdk/aws_v2/apiGatewa...	3.7 KiB	2.1 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: 570 ms 636.3 KiB

URL	Transfer Size	Est Savings
/sites/default/files/css/css_5LiDfqPo9pjLoZYsLdmDjEvoQX8D...	679.1 KiB	636.3 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: 210 ms 708.2 KiB

URL	Transfer Size	Est Savings
www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js	361.8 KiB	156.6 KiB
www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L&cx=c&gtm=4e64k0h1	147.0 KiB	105.8 KiB
www.googletagmanager.com/gtag/js?id=G-4603P06FHC	173.2 KiB	64.9 KiB
www.darpa.mil/core/assets/vendor/jquery/jquery.min.js?v=3.7.1	85.5 KiB	64.8 KiB
www.googletagmanager.com/gtm.js?id=GTM-MPT8LFHZ	133.9 KiB	64.6 KiB
www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L	147.0 KiB	62.2 KiB
/themes/custom/darpa_uswds/assets/js/react/18_3_1/react-d...	128.7 KiB	42.5 KiB
www.darpa.mil/core/misc/ajax.js?v=10.6.3	65.0 KiB	41.4 KiB
/themes/custom/darpa_uswds/assets/js/sdk/aws_v2/apiGatewa...	67.5 KiB	40.5 KiB
/themes/custom/darpa_uswds/assets/dist/js/recent_news.bun...	169.9 KiB	34.0 KiB
/themes/custom/darpa_uswds/assets/dist/js/contact_form_v2...	375.1 KiB	30.9 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.

URL	Total CPU Time	Script Evaluation	Script Parse
www.darpa.mil/	630 ms	6.1 ms	0.2 ms
www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js	591 ms	480 ms	60 ms
Unattributable	390 ms	7.9 ms	0.0 ms
www.googletagmanager.com/gtag/js?id=G-4603P06FHC	196 ms	169 ms	25 ms
/themes/custom/darpa_uswds/assets/js/react/18_3_1/react.p...	180 ms	158 ms	0.6 ms
www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L	153 ms	110 ms	23 ms
www.googletagmanager.com/gtm.js?id=GTM-MPT8LFHZ	142 ms	118 ms	22 ms
/themes/custom/darpa_uswds/assets/js/react/18_3_1/react-d...	131 ms	29 ms	6.1 ms
www.darpa.mil/themes/custom/darpa_uswds/assets/dist/js/navbar.bundle.js?tdvso6	59 ms	9.8 ms	45 ms
www.darpa.mil/themes/custom/darpa_uswds/assets/dist/js/carousel.bundle.js?tdvso6	52 ms	37 ms	11 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.

Category	Time Spent
Script Evaluation	1.3 s
Other	681 ms
Style & Layout	364 ms
Script Parsing & Compilation	282 ms
Garbage Collection	79 ms
Rendering	67 ms
Parse HTML & CSS	62 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.

URL	Transfer Size
www.darpa.mil/sites/default/files/gallery/2025-10/arpanet-napkin-4.png	1.7 MiB
www.darpa.mil/themes/custom/darpa_uswds/assets/dist/js/navbar.bundle.js?tdvso6	857.4 KiB
/sites/default/files/css/css_5LiDfqPo9pjLoZYsLdmDjEvoQX8D...	681.0 KiB
www.youtube.com/s/player/1bb6ee63/player_embed.vflset/en_US/base.js	471.9 KiB
www.youtube.com/s/player/1bb6ee63/player_embed_es6.vflset/en_US/base.js	436.0 KiB
/themes/custom/darpa_uswds/assets/dist/js/contact_form_v2...	376.7 KiB
/themes/custom/darpa_uswds/assets/dist/img/components/foo...	364.9 KiB
www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js	362.4 KiB
www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js	361.9 KiB
/sites/default/files/styles/top_tabs_content_panel/public...	342.8 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
DARPA logo `ul.flex > li > a.text-3xl > img.min-w-[100px]`	/themes/custom/darpa_uswds/assets/js/assets/DARPA_Draft_L...
DARPA Logo `div.grid-row > div.grid-col-auto > a > img.mobile-lg:margin-x-auto`	/themes/custom/darpa_uswds/assets/dist/img/components/foo...
div#gov-banner-dot-mil > div.grid-row > div.usa-banner__guidance > img.usa-banner__icon `div#gov-banner-dot-mil > div.grid-row > div.usa-banner__guidance > img.usa-banner__icon`	/themes/custom/darpa_uswds/assets/js/packages/usa_banner/...
div#gov-banner-dot-mil > div.grid-row > div.usa-banner__guidance > img.usa-banner__icon `div#gov-banner-dot-mil > div.grid-row > div.usa-banner__guidance > img.usa-banner__icon`	/themes/custom/darpa_uswds/assets/js/packages/usa_banner/...
header.usa-banner__header > div.usa-banner__inner > div.grid-col-auto > img.usa-banner__header-flag `header.usa-banner__header > div.usa-banner__inner > div.grid-col-auto > img.usa-banner__header-flag`	/themes/custom/darpa_uswds/assets/js/packages/usa_banner/...
x social network `ul.social-media-list > li > a > img`	/themes/custom/darpa_uswds/assets/dist/img/components/foo...
Facebook icon `ul.social-media-list > li > a > img`	/themes/custom/darpa_uswds/assets/dist/img/components/foo...
YouTube icon `ul.social-media-list > li > a > img`	/themes/custom/darpa_uswds/assets/dist/img/components/foo...
Instagram Icon `ul.social-media-list > li > a > img`	/themes/custom/darpa_uswds/assets/dist/img/components/foo...
LinkedIn icon `ul.social-media-list > li > a > img`	/themes/custom/darpa_uswds/assets/dist/img/components/foo...
RSS icon `ul.social-media-list > li > a > img`	/themes/custom/darpa_uswds/assets/dist/img/components/foo...

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

●Max Potential First Input Delay 100 ms

●Optimize DOM size

●LCP breakdown

●Modern HTTP

●Optimize viewport for mobile

●Minify CSS

●User Timing marks and measures 18 user timings

●Avoid long main-thread tasks 11 long tasks found

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 90 ms

●Server Backend Latencies 20 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Initial server response time was short Root document took 10 ms

○INP breakdown

○Avoid non-composited animations

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

Assistive technologies, like screen readers, can't interpret ARIA attributes with invalid values. Learn more about valid values for ARIA attributes.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
RACER \| 360° video `div#react-top-tabs > ul.usa-button-group > li.usa-button-group__item > button.usa-button`
Live Chain `div#react-top-tabs > ul.usa-button-group > li.usa-button-group__item > button.usa-button`
Podcast \| Ep 92 `div#react-top-tabs > ul.usa-button-group > li.usa-button-group__item > button.usa-button`

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

When a button doesn't have an accessible name, screen readers announce it as "button", making it unusable for users who rely on screen readers. Learn how to make buttons more accessible.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.grid-row > div.podcast-player-control > div.display-flex > button.rewind `div.grid-row > div.podcast-player-control > div.display-flex > button.rewind`
div.grid-row > div.podcast-player-control > div.display-flex > button.play-pause-btn `div.grid-row > div.podcast-player-control > div.display-flex > button.play-pause-btn`
div.grid-row > div.podcast-player-control > div.display-flex > button.forward `div.grid-row > div.podcast-player-control > div.display-flex > button.forward`
div.grid-row > div.podcast-player-control > div.display-flex > button.vol-control `div.grid-row > div.podcast-player-control > div.display-flex > button.vol-control`

Labels ensure that form controls are announced properly by assistive technologies, like screen readers. Learn more about form element labels.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.podcast-player-control > div.display-flex > div.tracker-container > input#usa-range `div.podcast-player-control > div.display-flex > div.tracker-container > input#usa-range`

Link text (and alternate text for images, when used as links) that is discernible, unique, and focusable improves the navigation experience for screen reader users. Learn how to make links accessible.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
ul.xl:flex > li.flex > div.flex > a.items-center `ul.xl:flex > li.flex > div.flex > a.items-center`
div.paragraph > div.usa-card__container > div.usa-card__footer > a.usa-button `div.paragraph > div.usa-card__container > div.usa-card__footer > a.usa-button`
div.paragraph > div.usa-card__container > div.usa-card__footer > a.usa-button `div.paragraph > div.usa-card__container > div.usa-card__footer > a.usa-button`
div.paragraph > div.usa-card__container > div.usa-card__footer > a.usa-button `div.paragraph > div.usa-card__container > div.usa-card__footer > a.usa-button`
div.paragraph > div.usa-card__container > div.usa-card__footer > a.usa-button `div.paragraph > div.usa-card__container > div.usa-card__footer > a.usa-button`
div.paragraph > div.usa-card__container > div.usa-card__footer > a.usa-button `div.paragraph > div.usa-card__container > div.usa-card__footer > a.usa-button`
div.paragraph > div.usa-card__container > div.usa-card__footer > a.usa-button `div.paragraph > div.usa-card__container > div.usa-card__footer > a.usa-button`
div.grid-row > div.desktop:grid-col > div.technical-offices-card > a.usa-button `div.grid-row > div.desktop:grid-col > div.technical-offices-card > a.usa-button`
div.grid-row > div.desktop:grid-col > div.technical-offices-card > a.usa-button `div.grid-row > div.desktop:grid-col > div.technical-offices-card > a.usa-button`
div.grid-row > div.desktop:grid-col > div.technical-offices-card > a.usa-button `div.grid-row > div.desktop:grid-col > div.technical-offices-card > a.usa-button`
div.grid-row > div.desktop:grid-col > div.technical-offices-card > a.usa-button `div.grid-row > div.desktop:grid-col > div.technical-offices-card > a.usa-button`
div.grid-row > div.desktop:grid-col > div.technical-offices-card > a.usa-button `div.grid-row > div.desktop:grid-col > div.technical-offices-card > a.usa-button`
div.grid-row > div.desktop:grid-col > div.technical-offices-card > a.usa-button `div.grid-row > div.desktop:grid-col > div.technical-offices-card > a.usa-button`

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.

Navigation

Properly ordered headings that do not skip levels convey the semantic structure of the page, making it easier to navigate and understand when using assistive technologies. Learn more about heading order.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
For quantum computing, different qubits are better togeth… `a.news-container-link > div.mb-3 > div.news-content > h6`
`div.podcast-player-content > div.display-flex > div.episode-status > h6.playback-status`
DARPA newcomers `div.paragraph > div.usa-card__container > div.usa-card__header > h4`
Biological Technologies Office `div.grid-row > div.desktop:grid-col > div.technical-offices-card > h5.text-center`

These are opportunities to improve keyboard navigation in your application.

Contrast

Low-contrast text is difficult or impossible for many users to read. Link text that is discernible improves the experience for users with low vision. Learn how to make links distinguishable.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Privacy Policy `form.width-full > div.grid-col-12 > p.reCAPTCHA-text > a`
Terms of Service `form.width-full > div.grid-col-12 > p.reCAPTCHA-text > a`

These are opportunities to improve the legibility of your content.

○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

●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

●`[aria-*]` attributes are valid and not misspelled

●Image elements have `[alt]` attributes

●Input buttons have discernible text.

●`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.

●Select elements have associated label elements.

●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

●`<frame>` or `<iframe>` elements have a title

●`<html>` element has a `[lang]` attribute

●`<html>` element has a valid value for its `[lang]` attribute

●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.

●Document has a main landmark.

●Deprecated ARIA roles were not used

●All heading elements contain content.

●Identical links have the same purpose.

○`[accesskey]` values are unique

○`button`, `link`, and `menuitem` elements have accessible names

○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

○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

○`<html>` element has an `[xml:lang]` attribute with the same base language as the `[lang]` attribute.

○`<input type="image">` elements have `[alt]` text

○The document does not use `<meta http-equiv="refresh">`

○`<object>` elements have alternate text

○Skip links are focusable.

○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>`.

○Uses ARIA roles only on compatible elements

○Image elements do not have `[alt]` attributes that are redundant text.

○Elements with visible text labels have matching accessible names.

○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.

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.

Source	Description
www.googletagmanager.com/gtag/js?id=G-4603P06FHC line 263, col 390	Connecting to 'https://region1.google-analytics.com/g/collect?v=2&tid=G-4603P06FHC&gtm=45je64k0h1v884410340z89199778149za200zd884410340&_p=1776892559781&gcd=13l3l3l2l1l1&npa=1&dma_cps=a&dma=1&gdid=dMDhkMT&_eu=AAACAAQ&_prs=gs&are=1&cid=632977761.1776892561&frm=0&pscdl=noapi&rcb=9&sr=800x600&uaa=x86&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uam=&uamb=0&uap=macOS&uapv=10.15.7&uaw=0&ul=en-us&_s=2&tag_exp=0~115938466~115938469~117266401~117512542&sid=1776892561&sct=1&seg=1&dl=https%3A%2F%2Fwww.darpa.mil%2F&dt=Home%20%7C%20DARPA&_tu=QA&en=page_view&_c=1&_et=146&tfd=2907' violates the following Content Security Policy directive: "connect-src 'self' https://www.google.com https://www.google-analytics.com". The action has been blocked.
www.googletagmanager.com/gtag/js?id=G-4603P06FHC line 263, col 390	Connecting to 'https://region1.google-analytics.com/g/collect?v=2&tid=G-4603P06FHC&gtm=45je64k0h1v884410340za200zd884410340&_p=1776892559781&gcd=13l3l3l2l1l1&npa=1&dma_cps=a&dma=1&gdid=dMDhkMT&_prs=gs&are=1&cid=632977761.1776892561&frm=0&pscdl=noapi&rcb=9&sr=800x600&uaa=x86&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uam=&uamb=0&uap=macOS&uapv=10.15.7&uaw=0&ul=en-us&_s=1&tag_exp=0~115938466~115938469~117266401~117512542&sid=1776892561&sct=1&seg=0&dl=https%3A%2F%2Fwww.darpa.mil%2F&dt=Home%20%7C%20DARPA&en=page_view&_fv=2&_nsi=1&_ss=2&_c=1&_ee=1&tfd=2749' violates the following Content Security Policy directive: "connect-src 'self' https://www.google.com https://www.google-analytics.com". The action has been blocked.
www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L line 203, col 390	Connecting to 'https://region1.google-analytics.com/g/collect?v=2&tid=G-CSLL4ZEK4L&gtm=45je64k0h1v9131934939za200zb884410340zd884410340&_p=1776892559781&gcd=13l3lPl2l1l1&npa=1&dma_cps=a&dma=1&gdid=dMDhkMT&_eu=AAAAAAQ&are=1&cid=632977761.1776892561&frm=0&pscdl=noapi&rcb=5&sr=800x600&uaa=x86&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uam=&uamb=0&uap=macOS&uapv=10.15.7&uaw=0&ul=en-us&tag_exp=0~115938466~115938468~117266400~117512542~118167059&dl=https%3A%2F%2Fdarpa.mil%2F&dt=Home%20%7C%20DARPA&dr=&sid=1776892561&sct=1&seg=0&_tu=wA&_s=2&tfd=8103' violates the following Content Security Policy directive: "connect-src 'self' https://www.google.com https://www.google-analytics.com". The action has been blocked.
www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L line 203, col 390	Connecting to 'https://region1.google-analytics.com/g/collect?v=2&tid=G-CSLL4ZEK4L&gtm=45je64k0h1v9131934939za200zb884410340zd884410340&_p=1776892559781&gcd=13l3lPl2l1l1&npa=1&dma_cps=a&dma=1&gdid=dMDhkMT&are=1&cid=632977761.1776892561&frm=0&pscdl=noapi&rcb=5&sr=800x600&uaa=x86&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uam=&uamb=0&uap=macOS&uapv=10.15.7&uaw=0&ul=en-us&_s=1&tag_exp=0~115938466~115938468~117266400~117512542~118167059&dl=https%3A%2F%2Fdarpa.mil%2F&dt=Home%20%7C%20DARPA&dr=&sid=1776892561&sct=1&seg=0&_tu=wA&en=page_view&_fv=1&_ss=1&_ee=1&ep.agency=DOD&ep.subagency=DARPA&ep.site_topic=unspecified%3Adarpa.mil&ep.site_platform=unspecified%3Adarpa.mil&ep.script_source=https%3A%2F%2Fdap.digitalgov.gov%2Funiversal-federated-analytics-min.js&ep.version=20250702%20v8.7%20-%20ga4&ep.protocol=https%3A&ep.using_parallel_tracker=no&ep.hostname_dimension=darpa.mil&tfd=3088' violates the following Content Security Policy directive: "connect-src 'self' https://www.google.com https://www.google-analytics.com". The action has been blocked.
www.googletagmanager.com/gtag/js?id=G-4603P06FHC line 263, col 390	Fetch API cannot load https://region1.google-analytics.com/g/collect?v=2&tid=G-4603P06FHC&gtm=45je64k0h1v884410340z89199778149za200zd884410340&_p=1776892559781&gcd=13l3l3l2l1l1&npa=1&dma_cps=a&dma=1&gdid=dMDhkMT&_eu=AAACAAQ&_prs=gs&are=1&cid=632977761.1776892561&frm=0&pscdl=noapi&rcb=9&sr=800x600&uaa=x86&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uam=&uamb=0&uap=macOS&uapv=10.15.7&uaw=0&ul=en-us&_s=2&tag_exp=0~115938466~115938469~117266401~117512542&sid=1776892561&sct=1&seg=1&dl=https%3A%2F%2Fwww.darpa.mil%2F&dt=Home%20%7C%20DARPA&_tu=QA&en=page_view&_c=1&_et=146&tfd=2907. Refused to connect because it violates the document's Content Security Policy.
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Issues logged to the `Issues` panel in Chrome Devtools indicate unresolved problems. They can come from network request failures, insufficient security controls, and other browser concerns. Open up the Issues panel in Chrome DevTools for more details on each issue.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Issue type
Content security policy

●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

●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

100

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.

○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 have descriptive text

●Links are crawlable

●robots.txt is valid

●Image elements have `[alt]` attributes

●Document has a valid `hreflang`

●Document has a valid `rel=canonical`