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
cdn1.readspeaker.com/script/6295/webReader/webReader.js?pids=wr	0.0 ms	28.2 KiB
platform.twitter.com/widgets.js	1800.0 s	27.3 KiB
dc.gov/sites/default/files/dc/shared_assets/social_icons/x-logo-lightgrey.png	1209600.0 s	170.1 KiB
/script/6295/webReader/r/r2889/ReadSpeaker.Styles-Button....	86400.0 s	39.9 KiB
www.google-analytics.com/analytics.js	7200.0 s	20.9 KiB
dc.gov/sites/default/files/dc/shared_assets/topic_icon_set/tickets-fines.png	1209600.0 s	97.3 KiB
dc.gov/sites/default/files/training-professional-certification_0.png	1209600.0 s	93.2 KiB
/sites/default/files/dc/shared_assets/topic_icon_set/tran...	1209600.0 s	92.9 KiB
dc.gov/sites/default/files/dc/shared_assets/resources_icon_set/subscribe.png	1209600.0 s	86.4 KiB
dc.gov/sites/default/files/dc/shared_assets/resources_icon_set/data.png	1209600.0 s	83.8 KiB
dc.gov/sites/default/files/dc/shared_assets/resources_icon_set/rss.png	1209600.0 s	81.9 KiB
dc.gov/sites/default/files/dc/shared_assets/resources_icon_set/maps.png	1209600.0 s	80.5 KiB
dc.gov/sites/default/files/dc/shared_assets/resources_icon_set/mobile.png	1209600.0 s	80.2 KiB
dc.gov/sites/default/files/dc/shared_assets/resources_icon_set/webcasts.png	1209600.0 s	79.8 KiB
dc.gov/cdn-cgi/challenge-platform/h/b/scripts/jsd/0b8fb825cb67/main.js?	14400.0 s	11.4 KiB
dc.gov/sites/default/files/dc/shared_assets/resources_icon_set/facebook.png	1209600.0 s	77.5 KiB
dc.gov/sites/all/themes/dc_home_omega/fonts/Roboto-Regular.ttf	1209600.0 s	75.1 KiB
/sites/default/files/styles/dc_home_feature/public/dc/sit...	1209600.0 s	55.3 KiB
/sites/default/files/styles/dc_home_feature/public/dc/sit...	1209600.0 s	55.3 KiB
dc.gov/sites/default/files/dc/shared_assets/BOW13_final.jpg	1209600.0 s	48.7 KiB
dc.gov/sites/default/files/dc/dcgov_logo.jpg	1209600.0 s	44.2 KiB
/beacon.min.js/v8c78df7c7c0f484497ecbca7046644da177152312...	86400.0 s	10.7 KiB
cse.google.com/cse.js?cx=012222452693656877933:sul8glk5y2y	0.0 ms	4.0 KiB
dc.gov/sites/default/files/dc/shared_assets/mayor-bowser-logo.jpg	1209600.0 s	36.6 KiB
/sites/all/modules/contrib/jquery_update/replace/jquery/1...	1209600.0 s	32.8 KiB
dc.gov/sites/default/files/dc/shared_assets/BOW14_Winner.png	1209600.0 s	26.7 KiB
dc.gov/sites/default/files/dc/shared_assets/main_stars.jpg	1209600.0 s	20.7 KiB
dc.gov/sites/default/files/dc/shared_assets/line_bg.jpg	1209600.0 s	20.0 KiB
/sites/default/files/styles/dc_home_feature/public/dc/sit...	1209600.0 s	18.0 KiB
/sites/default/files/styles/dc_home_feature/public/dc/sit...	1209600.0 s	18.0 KiB
/sites/default/files/styles/dc_home_feature/public/dc/sit...	1209600.0 s	14.3 KiB
/sites/default/files/styles/dc_home_feature/public/dc/sit...	1209600.0 s	14.3 KiB
dc.gov/sites/all/themes/dc_home_omega/js/bxslider/jquery.bxslider.js?szii6f	1209600.0 s	11.5 KiB
www.google.com/cse/static/style/look/v6/default.css	3000.0 s	1.2 KiB
dc.gov/sites/all/themes/dc_home_omega/js/bxslider/images/bx_loader.gif	1209600.0 s	8.5 KiB
dc.gov/misc/ajax.js?v=7.82	1209600.0 s	8.3 KiB
dc.gov/sites/all/themes/dc_home_omega/css/global.css?szii6f	1209600.0 s	7.8 KiB
dc.gov/sites/default/files/dc/dcgovhr.png	1209600.0 s	7.1 KiB
dc.gov/sites/default/files/dc/shared_assets/dc_home_logo2_small.png	1209600.0 s	7.0 KiB
dc.gov/misc/drupal.js?szii6f	1209600.0 s	6.9 KiB
dc.gov/sites/default/files/bxslider/images/controls2.png	1209600.0 s	6.7 KiB
dc.gov/sites/default/files/dc/shared_assets/map_icon_footer.png	1209600.0 s	5.8 KiB
/sites/all/themes/dc_home_omega/css/dc-home-omega-alpha-d...	1209600.0 s	4.6 KiB
dc.gov/misc/jquery-html-prefilter-3.5.0-backport.js?v=1.8.3	1209600.0 s	4.5 KiB
dc.gov/sites/all/themes/dc_home_omega/js/dcHome.js?szii6f	1209600.0 s	4.2 KiB
/sites/all/modules/contrib/jquery_update/replace/misc/jqu...	1209600.0 s	4.1 KiB
/sites/all/themes/dc_home_omega/templates/twitterfeed/ima...	1209600.0 s	3.3 KiB
/sites/default/files/styles/dc_home_highlights/public/dc/...	1209600.0 s	3.2 KiB
dc.gov/sites/all/themes/dc_home_omega/js/bxslider/images/controls.png	1209600.0 s	2.9 KiB
dc.gov/sites/all/themes/dc_home_omega/templates/twitterfeed/twitterfeed.js	1209600.0 s	2.8 KiB
dc.gov/sites/all/themes/dc_home_omega/css/normalize.css?szii6f	1209600.0 s	2.3 KiB
dc.gov/sites/all/modules/views/js/ajax_view.js?szii6f	1209600.0 s	2.0 KiB
dc.gov/modules/system/system.base.css?szii6f	1209600.0 s	2.0 KiB
dc.gov/sites/all/modules/google_analytics/googleanalytics.js?szii6f	1209600.0 s	1.9 KiB
dc.gov/sites/default/files/dc/shared_assets/community_icon_footer.png	1209600.0 s	1.9 KiB
dc.gov/sites/default/files/dc/shared_assets/contact_footer_icon.png	1209600.0 s	1.9 KiB
dc.gov/sites/default/files/dc/shared_assets/infoCenter_icon_footer.png	1209600.0 s	1.9 KiB
dc.gov/sites/all/modules/text_resize/jquery.cookie.js?szii6f	1209600.0 s	1.6 KiB
dc.gov/sites/all/modules/extlink/extlink.js?szii6f	1209600.0 s	1.6 KiB
dc.gov/sites/default/files/dc/shared_assets/search2.png	1209600.0 s	1.6 KiB
dc.gov/sites/all/themes/dc_home_omega/css/dc-home-omega-alpha-default.css?szii6f	1209600.0 s	1.5 KiB
dc.gov/sites/default/files/dc/shared_assets/h2stars.png	1209600.0 s	1.5 KiB
/sites/all/modules/contrib/jquery_update/replace/ui/exter...	1209600.0 s	1.5 KiB
dc.gov/sites/all/themes/omega/omega/css/formalize.css?szii6f	1209600.0 s	1.5 KiB
/sites/all/themes/dc_home_omega/css/dc-home-omega-alpha-d...	1209600.0 s	1.4 KiB
dc.gov/misc/jquery-extend-3.4.0.js?v=1.8.3	1209600.0 s	1.4 KiB
dc.gov/sites/all/modules/quicktabs/js/quicktabs.js?szii6f	1209600.0 s	1.4 KiB
dc.gov/sites/all/modules/text_resize/text_resize.js?szii6f	1209600.0 s	1.4 KiB
dc.gov/sites/all/themes/dc_home_omega/images/more-arrow.png	1209600.0 s	1.3 KiB
dc.gov/sites/all/themes/omega/omega/js/jquery.formalize.js?szii6f	1209600.0 s	1.3 KiB
dc.gov/sites/all/modules/views/js/base.js?szii6f	1209600.0 s	1.3 KiB
dc.gov/modules/system/system.theme.css?szii6f	1209600.0 s	1.3 KiB
dc.gov/misc/progress.js?szii6f	1209600.0 s	1.3 KiB
/sites/all/themes/omega/alpha/css/grid/alpha_default/norm...	1209600.0 s	1.3 KiB
/sites/all/themes/omega/alpha/css/grid/alpha_default/narr...	1209600.0 s	1.3 KiB
dc.gov/sites/all/themes/dc_home_omega/js/bxslider/jquery.bxslider.css?szii6f	1209600.0 s	1.2 KiB
dc.gov/misc/jquery.once.js?v=1.2	1209600.0 s	1.2 KiB
/sites/all/themes/omega/alpha/css/grid/alpha_default/wide...	1209600.0 s	1.2 KiB
dc.gov/sites/default/files/dc/shared_assets/dot.png	1209600.0 s	1.1 KiB
dc.gov/sites/all/themes/omega/omega/js/omega-mediaqueries.js?szii6f	1209600.0 s	1.0 KiB
dc.gov/sites/all/modules/date/date_popup/themes/datepicker.1.7.css?szii6f	1209600.0 s	1.0 KiB
/sites/all/themes/dc_home_omega/css/dc-home-omega-alpha-d...	1209600.0 s	897 B
/sites/all/themes/omega/alpha/css/grid/alpha_default/narr...	1209600.0 s	864 B
/sites/all/themes/omega/alpha/css/grid/alpha_default/norm...	1209600.0 s	845 B
dc.gov/modules/user/user.css?szii6f	1209600.0 s	829 B
/sites/all/themes/omega/alpha/css/grid/alpha_default/wide...	1209600.0 s	818 B
dc.gov/sites/all/themes/omega/alpha/css/alpha-reset.css?szii6f	1209600.0 s	818 B
dc.gov/modules/system/system.menus.css?szii6f	1209600.0 s	769 B
dc.gov/sites/all/themes/omega/omega/css/omega-text.css?szii6f	1209600.0 s	761 B
dc.gov/sites/all/modules/date/date_repeat_field/date_repeat_field.css?szii6f	1209600.0 s	676 B
dc.gov/modules/book/book.css?szii6f	1209600.0 s	543 B
dc.gov/modules/system/system.messages.css?szii6f	1209600.0 s	536 B
/sites/all/modules/quicktabs/quicktabs_tabstyles/tabstyle...	1209600.0 s	481 B
dc.gov/sites/all/modules/views/css/views.css?szii6f	1209600.0 s	461 B
dc.gov/sites/all/themes/omega/alpha/css/alpha-mobile.css?szii6f	1209600.0 s	443 B
dc.gov/sites/all/modules/panels/css/panels.css?szii6f	1209600.0 s	439 B
dc.gov/sites/all/modules/ctools/css/ctools.css?szii6f	1209600.0 s	431 B
dc.gov/sites/all/modules/contrib/flickrgallery/flickrgallery.css?szii6f	1209600.0 s	414 B
dc.gov/sites/all/modules/text_resize/text_resize.css?szii6f	1209600.0 s	409 B
dc.gov/modules/search/search.css?szii6f	1209600.0 s	370 B
dc.gov/sites/all/modules/contrib/jquery_update/js/jquery_update.js?v=0.0.1	1209600.0 s	365 B
dc.gov/modules/field/theme/field.css?szii6f	1209600.0 s	345 B
dc.gov/sites/all/themes/dc_home_omega/js/voc.js?szii6f	1209600.0 s	345 B
dc.gov/sites/all/modules/extlink/extlink.css?szii6f	1209600.0 s	340 B
dc.gov/sites/all/themes/omega/omega/css/omega-branding.css?szii6f	1209600.0 s	322 B
dc.gov/sites/all/modules/contrib/seckit/js/seckit.document_write.js	1209600.0 s	298 B
dc.gov/sites/all/modules/ckeditor/css/ckeditor.css?szii6f	1209600.0 s	294 B
dc.gov/sites/all/modules/quicktabs/css/quicktabs.css?szii6f	1209600.0 s	284 B
dc.gov/modules/comment/comment.css?szii6f	1209600.0 s	271 B
dc.gov/sites/all/modules/contrib/seckit/css/seckit.no_body.css	1209600.0 s	267 B
dc.gov/sites/all/themes/omega/omega/css/omega-forms.css?szii6f	1209600.0 s	256 B
dc.gov/modules/node/node.css?szii6f	1209600.0 s	239 B
dc.gov/sites/all/modules/domain/domain_nav/domain_nav.css?szii6f	1209600.0 s	232 B
dc.gov/sites/all/modules/rate/rate.css?szii6f	1209600.0 s	231 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:0.10488] map[node:map[boundingRect:map[bottom:985 height:217 left:155 right:1195 top:768 width:1040] lhId:page-24-DIV nodeLabel:Featured Services Pay Tickets Pay parking and photo enforcement tickets online.… path:1,HTML,1,BODY,3,DIV,1,SECTION,0,DIV,0,DIV,5,DIV,0,DIV,1,DIV,0,DIV,0,DIV,0,DIV,2,DIV,0,DIV selector:div.content > div.panel-display > div#bottom-panel-section > div.panel-panel snippet:<div class="panel-panel feature-service-panel grid-24"> type:node] score:0.062806] map[node:map[boundingRect:map[bottom:2367 height:2267 left:0 right:1350 top:100 width:1350] lhId:page-21-BODY nodeLabel:body.html path:1,HTML,1,BODY selector:body.html snippet:<body class="html front not-logged-in no-sidebars page-portalwip domain-dc-gov i18n-en …" data-rsevent-id="rs_587372"> type:node] score:0.020095 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:210 height:130 left:1052 right:1158 top:80 width:106] lhId:page-13-IMG nodeLabel:div.content > div.header-mayor-pic > a > img path:1,HTML,1,BODY,3,DIV,0,HEADER,1,DIV,0,DIV,1,DIV,0,DIV,0,DIV,0,DIV,0,DIV,5,DIV,0,A,0,IMG selector:div.content > div.header-mayor-pic > a > img snippet:<img src="/sites/default/files/dc/shared_assets/mayor-bowser-logo.jpg" width="100px"> type:node]]] type:subitems]] map[node:map[boundingRect:map[bottom:236 height:156 left:1038 right:1171 top:80 width:133] lhId:page-25-DIV nodeLabel:Mayor Muriel Bowser path:1,HTML,1,BODY,3,DIV,0,HEADER,1,DIV,0,DIV,1,DIV,0,DIV,0,DIV,0,DIV,0,DIV,5,DIV selector:div#block-block-102 > div.block-inner > div.content > div.header-mayor-pic snippet:<div class="header-mayor-pic"> type:node] score:0.014146 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:210 height:130 left:1052 right:1158 top:80 width:106] lhId:page-13-IMG nodeLabel:div.content > div.header-mayor-pic > a > img path:1,HTML,1,BODY,3,DIV,0,HEADER,1,DIV,0,DIV,1,DIV,0,DIV,0,DIV,0,DIV,0,DIV,5,DIV,0,A,0,IMG selector:div.content > div.header-mayor-pic > a > img snippet:<img src="/sites/default/files/dc/shared_assets/mayor-bowser-logo.jpg" width="100px"> type:node]]] type:subitems]] map[node:map[boundingRect:map[bottom:753 height:400 left:155 right:1195 top:353 width:1040] lhId:page-23-DIV nodeLabel:Stay Safe with a Free Carbon Monoxide Alarm DC Health’s new Carbon Monoxide Po… path:1,HTML,1,BODY,3,DIV,1,SECTION,0,DIV,0,DIV,5,DIV,0,DIV,1,DIV,0,DIV,0,DIV,0,DIV,1,DIV,0,DIV selector:div.content > div.panel-display > div#top-panel-section > div.panel-panel snippet:<div class="panel-panel grid-24"> type:node] score:0.006795] map[node:map[boundingRect:map[bottom:68 height:56 left:210 right:1090 top:12 width:880] lhId:page-22-DIV nodeLabel:Residents Government Visitors Education Jobs Online Services Mayor path:1,HTML,1,BODY,3,DIV,0,HEADER,0,DIV,0,DIV,1,DIV,0,DIV,0,NAV,2,DIV,0,DIV,0,DIV selector:nav.navigation > div#block-system-main-menu > div.block-inner > div.content snippet:<div class="content clearfix"> type:node] score:0.001015 subItems:map[items:[map[cause:Web font extra:map[type:url value:https://dc.gov/sites/all/themes/dc_home_omega/fonts/Roboto-Regular.ttf]]] type:subitems]]]

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
dc.gov/sites/all/themes/dc_home_omega/fonts/Roboto-Regular.ttf	35 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.

	URL	Resource Size	Est Savings
Pay a Ticket `div.views-field > div.field-content > a > img`	dc.gov/sites/default/files/dc/shared_assets/topic_icon_set/tickets-fines.png	96.9 KiB	96.5 KiB
Basic Business License Maintenance `div.views-field > div.field-content > a > img`	dc.gov/sites/default/files/training-professional-certification_0.png	93.0 KiB	92.6 KiB
car icon `div.views-field > div.field-content > a > img`	/sites/default/files/dc/shared_assets/topic_icon_set/tran...	92.7 KiB	92.3 KiB
Subscribe `div.block-inner > div.content > div#resource-icon-section > div.resource-content-block`	dc.gov/sites/default/files/dc/shared_assets/resources_icon_set/subscribe.png	86.1 KiB	85.4 KiB
Data `div.block-inner > div.content > div#resource-icon-section > div.resource-content-block`	dc.gov/sites/default/files/dc/shared_assets/resources_icon_set/data.png	83.6 KiB	82.9 KiB
RSS `div.block-inner > div.content > div#resource-icon-section > div.resource-content-block`	dc.gov/sites/default/files/dc/shared_assets/resources_icon_set/rss.png	81.6 KiB	80.9 KiB
Maps `div.block-inner > div.content > div#resource-icon-section > div.resource-content-block`	dc.gov/sites/default/files/dc/shared_assets/resources_icon_set/maps.png	80.3 KiB	79.5 KiB
Mobile `div.block-inner > div.content > div#resource-icon-section > div.resource-content-block`	dc.gov/sites/default/files/dc/shared_assets/resources_icon_set/mobile.png	80.0 KiB	79.3 KiB
Webcasts `div.block-inner > div.content > div#resource-icon-section > div.resource-content-block`	dc.gov/sites/default/files/dc/shared_assets/resources_icon_set/webcasts.png	79.6 KiB	78.9 KiB
Facebook `div.block-inner > div.content > div#resource-icon-section > div.resource-content-block`	dc.gov/sites/default/files/dc/shared_assets/resources_icon_set/facebook.png	77.3 KiB	76.5 KiB
Best of the Web logo 2013 `div > div > a > img`	dc.gov/sites/default/files/dc/shared_assets/BOW13_final.jpg	48.5 KiB	47.5 KiB
Stay Safe with a Free Carbon Monoxide Alarm `div.bx-clone > div.slide > a > img`	/sites/default/files/styles/dc_home_feature/public/dc/sit...	55.1 KiB	47.3 KiB
DC.Gov Home `div.branding-data > div.logo-img > a > img`	dc.gov/sites/default/files/dc/dcgov_logo.jpg	44.0 KiB	42.2 KiB
div.content > div.header-mayor-pic > a > img `div.content > div.header-mayor-pic > a > img`	dc.gov/sites/default/files/dc/shared_assets/mayor-bowser-logo.jpg	36.5 KiB	34.5 KiB
Best of the Web logo 2014 `div > div > a > img`	dc.gov/sites/default/files/dc/shared_assets/BOW14_Winner.png	26.6 KiB	25.6 KiB
body.html > footer#section-footer > div#zone-prefooter-wrapper `body.html > footer#section-footer > div#zone-prefooter-wrapper`	dc.gov/sites/default/files/dc/shared_assets/main_stars.jpg	20.5 KiB	20.3 KiB
body.html > footer#section-footer > div#zone-prefooter-wrapper `body.html > footer#section-footer > div#zone-prefooter-wrapper`	dc.gov/sites/default/files/dc/shared_assets/line_bg.jpg	19.8 KiB	19.8 KiB
Mayor Bowser's 10-Year Progress Report: A Decade of Delivering `div.bx-clone > div.slide > a > img`	/sites/default/files/styles/dc_home_feature/public/dc/sit...	17.8 KiB	10.0 KiB
DC.Gov Home `div.branding-data > div.logo-img > a > img`	dc.gov/sites/default/files/dc/dcgovhr.png	6.9 KiB	6.7 KiB
Image of people skating with the words "Fort Dupont Ice Arena" on top `div.bx-clone > div.slide > a > img`	/sites/default/files/styles/dc_home_feature/public/dc/sit...	14.2 KiB	6.4 KiB
Next `div.bx-wrapper > div.bx-controls > div.bx-controls-direction > a.bx-next`	dc.gov/sites/default/files/bxslider/images/controls2.png	6.5 KiB	5.5 KiB
District News `div.dcBar > div.dcFooterList > div.footer-icon > img`	dc.gov/sites/default/files/dc/shared_assets/map_icon_footer.png	5.7 KiB	5.0 KiB

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

lhId: page-20-IMG

nodeLabel: Stay Safe with a Free Carbon Monoxide Alarm

path: 1,HTML,1,BODY,3,DIV,1,SECTION,0,DIV,0,DIV,5,DIV,0,DIV,1,DIV,0,DIV,0,DIV,0,DIV,1,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,1,DIV,0,DIV,0,DIV,3,DIV,0,DIV,0,A,0,IMG

selector: div > div.slide > a > img

snippet: <img typeof="foaf:Image" src="https://dc.gov/sites/default/files/styles/dc_home_feature/public/dc/sites/…" width="316" height="167" alt="Stay Safe with a Free Carbon Monoxide Alarm">

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.

URL	Transfer Size	Duration
dc.gov/sites/all/themes/dc_home_omega/css/dc-home-omega-alpha-default.css?szii6f	1.5 KiB
/sites/all/themes/omega/alpha/css/grid/alpha_default/norm...	845 B
dc.gov/sites/all/themes/omega/omega/css/omega-text.css?szii6f	761 B
dc.gov/sites/all/modules/extlink/extlink.css?szii6f	340 B
dc.gov/sites/all/themes/dc_home_omega/css/global.css?szii6f	7.8 KiB
dc.gov/sites/all/themes/omega/omega/css/omega-branding.css?szii6f	322 B
/sites/all/themes/omega/alpha/css/grid/alpha_default/wide...	1.2 KiB
dc.gov/sites/all/modules/views/css/views.css?szii6f	461 B
/sites/all/themes/omega/alpha/css/grid/alpha_default/narr...	1.3 KiB
dc.gov/sites/all/themes/omega/omega/css/formalize.css?szii6f	1.5 KiB	54 ms
/sites/all/themes/dc_home_omega/css/dc-home-omega-alpha-d...	4.6 KiB
/sites/all/themes/omega/alpha/css/grid/alpha_default/norm...	1.3 KiB
/sites/all/themes/omega/alpha/css/grid/alpha_default/wide...	818 B
dc.gov/sites/all/modules/date/date_repeat_field/date_repeat_field.css?szii6f	676 B
dc.gov/sites/all/themes/omega/alpha/css/alpha-mobile.css?szii6f	443 B
/sites/all/themes/omega/alpha/css/grid/alpha_default/narr...	864 B
dc.gov/sites/all/themes/dc_home_omega/js/bxslider/jquery.bxslider.css?szii6f	1.2 KiB
/sites/all/themes/dc_home_omega/css/dc-home-omega-alpha-d...	897 B
dc.gov/sites/all/themes/omega/omega/css/omega-forms.css?szii6f	256 B
dc.gov/sites/all/themes/omega/alpha/css/alpha-reset.css?szii6f	818 B
dc.gov/sites/all/modules/date/date_popup/themes/datepicker.1.7.css?szii6f	1.0 KiB
dc.gov/sites/all/modules/panels/css/panels.css?szii6f	439 B
dc.gov/sites/all/modules/quicktabs/css/quicktabs.css?szii6f	284 B
dc.gov/sites/all/modules/rate/rate.css?szii6f	231 B
/sites/all/themes/dc_home_omega/css/dc-home-omega-alpha-d...	1.4 KiB
dc.gov/modules/system/system.messages.css?szii6f	536 B
dc.gov/sites/all/modules/contrib/flickrgallery/flickrgallery.css?szii6f	414 B
dc.gov/sites/all/themes/dc_home_omega/css/normalize.css?szii6f	2.3 KiB
dc.gov/sites/all/modules/ckeditor/css/ckeditor.css?szii6f	294 B
dc.gov/sites/all/modules/domain/domain_nav/domain_nav.css?szii6f	232 B
dc.gov/sites/all/modules/text_resize/text_resize.css?szii6f	409 B
/sites/all/modules/quicktabs/quicktabs_tabstyles/tabstyle...	481 B
dc.gov/sites/all/modules/ctools/css/ctools.css?szii6f	431 B
dc.gov/modules/field/theme/field.css?szii6f	345 B
dc.gov/modules/node/node.css?szii6f	239 B
dc.gov/modules/user/user.css?szii6f	829 B
dc.gov/modules/search/search.css?szii6f	370 B
dc.gov/modules/book/book.css?szii6f	543 B
dc.gov/modules/system/system.menus.css?szii6f	769 B
dc.gov/modules/comment/comment.css?szii6f	271 B
dc.gov/modules/system/system.theme.css?szii6f	1.3 KiB
dc.gov/modules/system/system.base.css?szii6f	2.0 KiB

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

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
Featured Services Pay Tickets Pay parking and photo enforcement tickets online.… `div.content > div.panel-display > div#bottom-panel-section > div.panel-panel`	0.063
body.html `body.html`	0.020
Mayor Muriel Bowser `div#block-block-102 > div.block-inner > div.content > div.header-mayor-pic`	0.014
Stay Safe with a Free Carbon Monoxide Alarm DC Health’s new Carbon Monoxide Po… `div.content > div.panel-display > div#top-panel-section > div.panel-panel`	0.007
Residents Government Visitors Education Jobs Online Services Mayor `nav.navigation > div#block-system-main-menu > div.block-inner > div.content`	0.001
Listen `div#readspeaker_button1 > a.rsbtn_play > span.rsbtn_left > span.rsbtn_text`	0.000

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.

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: 50 ms 18.1 KiB

URL	Transfer Size	Est Savings
dc.gov/sites/all/themes/dc_home_omega/js/bxslider/jquery.bxslider.js?szii6f	11.4 KiB	5.4 KiB
dc.gov/misc/ajax.js?v=7.82	8.2 KiB	5.0 KiB
dc.gov/misc/drupal.js?szii6f	6.9 KiB	4.6 KiB
dc.gov/misc/jquery-html-prefilter-3.5.0-backport.js?v=1.8.3	4.4 KiB	3.1 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: 110 ms 153.5 KiB

URL	Transfer Size	Est Savings
www.googletagmanager.com/gtag/js?id=G-XLLLT5975Z	173.5 KiB	71.1 KiB
/cse/static/element/dc329f57de078f5d/cse_element__en.js?u...	102.7 KiB	50.9 KiB
cse.google.com/adsense/search/async-ads.js	43.3 KiB	31.5 KiB

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 reason	Failure type
An iframe on the page started a navigation that did not complete.	Not actionable

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: 0.0 ms 5.4 KiB

URL	Transfer Size	Est Savings
www.google.com/cse/static/element/dc329f57de078f5d/default_v6+en.css	12.0 KiB	3.3 KiB
dc.gov/sites/all/themes/dc_home_omega/css/global.css?szii6f	7.8 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: 0.0 ms 46.9 KiB

URL	Transfer Size	Est Savings
/script/6295/webReader/r/r2889/ReadSpeaker.Styles-Button....	39.4 KiB	35.9 KiB
www.google.com/cse/static/element/dc329f57de078f5d/default_v6+en.css	11.9 KiB	10.9 KiB

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

	URL
DC.Gov Home `div.branding-data > div.logo-img > a > img`	dc.gov/sites/default/files/dc/dcgovhr.png
Best of the Web logo 2014 `div > div > a > img`	dc.gov/sites/default/files/dc/shared_assets/BOW14_Winner.png
div.content > div.header-mayor-pic > a > img `div.content > div.header-mayor-pic > a > img`	dc.gov/sites/default/files/dc/shared_assets/mayor-bowser-logo.jpg
Best of the Web logo 2013 `div > div > a > img`	dc.gov/sites/default/files/dc/shared_assets/BOW13_final.jpg
District News `div.dcBar > div.dcFooterList > div.footer-icon > img`	dc.gov/sites/default/files/dc/shared_assets/map_icon_footer.png
District Initiatives `div.dcBar > div.dcFooterList > div.footer-icon > img`	dc.gov/sites/default/files/dc/shared_assets/infoCenter_icon_footer.png
About DC `div.dcBar > div.dcFooterList > div.footer-icon > img`	dc.gov/sites/default/files/dc/shared_assets/community_icon_footer.png
Contact Us `div.dcBar > div.dcFooterList > div.footer-icon > img`	dc.gov/sites/default/files/dc/shared_assets/contact_footer_icon.png

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

●Document request latency

●Optimize DOM size

●Forced reflow

●LCP breakdown

●Modern HTTP

●Optimize viewport for mobile

●Avoids enormous network payloads Total size was 2,358 KiB

●User Timing marks and measures 5 user timings

●JavaScript execution time 0.5 s

●Minimizes main-thread work 1.0 s

●Avoid long main-thread tasks 1 long task found

●Network Requests

●Network Round Trip Times 50 ms

●Server Backend Latencies 110 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Avoid multiple page redirects

●Initial server response time was short Root document took 30 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.

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.content > div.header-mayor-pic > a > img `div.content > div.header-mayor-pic > a > 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.

Best practices

Disabling zooming is problematic for users with low vision who rely on screen magnification to properly see the contents of a web page. Learn more about the viewport meta tag.

Why this matters

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

Source: MDN Permissions-Policy

Failing Elements
head > meta `head > meta`

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
Mayor Muriel Bowser `div.content > div.header-mayor-pic > div.header-mayor-text > a`
Start `div.bx-controls > div.bx-controls-auto > div.bx-controls-auto-item > a.bx-start`
Stop `div.bx-controls > div.bx-controls-auto > div.bx-controls-auto-item > a.bx-stop`
Mayor's Public Schedule `div.dcFooterList > ul#list > li > a`
Citywide News `div.dcFooterList > ul#list > li > a`
Citywide Calendar `div.dcFooterList > ul#list > li > a`
Subscribe to Receive Emails `div.dcFooterList > ul#list > li > a.ext`
Subscribe to Text Alerts `div.dcFooterList > ul#list > li > a`
Subscribe to Newsletters `div.dcFooterList > ul#list > li > a.ext`
Green DC `div.dcFooterList > ul#list2 > li > a`
Age-Friendly DC `div.dcFooterList > ul#list2 > li > a`
Sustainable DC `div.dcFooterList > ul#list2 > li > a`
Connect DC `div.dcFooterList > ul#list2 > li > a`
Great Streets `div.dcFooterList > ul#list2 > li > a`
Ready DC `div.dcFooterList > ul#list2 > li > a`
Open DC `div.dcFooterList > ul#list3 > li > a`
Budget `div.dcFooterList > ul#list3 > li > a`
Emancipation `div.dcFooterList > ul#list3 > li > a`
Consumer Protection `div.dcFooterList > ul#list3 > li > a`
Contracts `div.dcFooterList > ul#list3 > li > a`
Property Quest `div.dcFooterList > ul#list3 > li > a`
Agency Directory `div.dcFooterList > ul#list5 > li > a`
Call 311 `div.dcFooterList > ul#list5 > li > a`
Contact the Mayor `div.dcFooterList > ul#list5 > li > a`
Contact Agency Directors `div.dcFooterList > ul#list5 > li > a`
FOIA Requests `div.dcFooterList > ul#list5 > li > a`
Report Website Problems `div.dcFooterList > ul#list5 > li > a`
Service Request Center `div.dcFooterList > ul#list5 > li > a`

One main landmark helps screen reader users navigate a web page. Learn more about landmarks.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
html.js `html.js`

These items highlight common accessibility best practices.

○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

●Form elements have associated labels

●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

●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

●Heading elements appear in a sequentially-descending order

●Deprecated ARIA roles were not used

●Identical links have the same purpose.

●Elements with visible text labels have matching accessible names.

○`[accesskey]` values are unique

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

○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 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

○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 buttons have discernible text.

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

○Links are distinguishable without relying on color.

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

○`<object>` elements have alternate text

○Select elements have associated label elements.

○Skip links are focusable.

○No element has a `[tabindex]` value greater than 0

○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.

Best Practices

Trust and Safety

All sites should be protected with HTTPS, even ones that don't handle sensitive data. This includes avoiding mixed content, where some resources are loaded over HTTP despite the initial request being served over HTTPS. HTTPS prevents intruders from tampering with or passively listening in on the communications between your app and your users, and is a prerequisite for HTTP/2 and many new web platform APIs. Learn more about HTTPS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Insecure URL	Request Resolution
dc.gov/sites/default/files/dc/dcgovhr.png	Automatically upgraded to HTTPS

User Experience

Image display dimensions should match natural aspect ratio. Learn more about image aspect ratio.

Why this matters

Performance issues directly impact user engagement and conversion rates.

	URL	Aspect Ratio (Displayed)	Aspect Ratio (Actual)
Stay Safe with a Free Carbon Monoxide Alarm `div.bx-clone > div.slide > a > img`	/sites/default/files/styles/dc_home_feature/public/dc/sit...	286 x 167 (1.71)	316 x 167 (1.89)
Image of people skating with the words "Fort Dupont Ice Arena" on top `div.bx-clone > div.slide > a > img`	/sites/default/files/styles/dc_home_feature/public/dc/sit...	286 x 167 (1.71)	316 x 167 (1.89)
Mayor Bowser's 10-Year Progress Report: A Decade of Delivering `div.bx-clone > div.slide > a > img`	/sites/default/files/styles/dc_home_feature/public/dc/sit...	286 x 167 (1.71)	316 x 167 (1.89)
Stay Safe with a Free Carbon Monoxide Alarm `div > div.slide > a > img`	/sites/default/files/styles/dc_home_feature/public/dc/sit...	286 x 167 (1.71)	316 x 167 (1.89)
Image of people skating with the words "Fort Dupont Ice Arena" on top `div > div.slide > a > img`	/sites/default/files/styles/dc_home_feature/public/dc/sit...	286 x 167 (1.71)	316 x 167 (1.89)
Mayor Bowser's 10-Year Progress Report: A Decade of Delivering `div > div.slide > a > img`	/sites/default/files/styles/dc_home_feature/public/dc/sit...	286 x 167 (1.71)	316 x 167 (1.89)
Stay Safe with a Free Carbon Monoxide Alarm `div.bx-clone > div.slide > a > img`	/sites/default/files/styles/dc_home_feature/public/dc/sit...	286 x 167 (1.71)	316 x 167 (1.89)
Image of people skating with the words "Fort Dupont Ice Arena" on top `div.bx-clone > div.slide > a > img`	/sites/default/files/styles/dc_home_feature/public/dc/sit...	286 x 167 (1.71)	316 x 167 (1.89)
Mayor Bowser's 10-Year Progress Report: A Decade of Delivering `div.bx-clone > div.slide > a > img`	/sites/default/files/styles/dc_home_feature/public/dc/sit...	286 x 167 (1.71)	316 x 167 (1.89)

General

Deprecated APIs will eventually be removed from the browser. Learn more about deprecated APIs.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Deprecation / Warning	Source
Synchronous XMLHttpRequest on the main thread is deprecated because of its detrimental effects to the end user's experience. For more help, check https://xhr.spec.whatwg.org/.	/sites/all/modules/contrib/jquery_update/replace/jquery/1... line 1, col 85842
SharedStorage	dc.gov/cdn-cgi/challenge-platform/scripts/jsd/main.js
StorageType.persistent is deprecated. Please use standardized navigator.storage instead.	dc.gov/cdn-cgi/challenge-platform/scripts/jsd/main.js
Fledge	dc.gov/cdn-cgi/challenge-platform/scripts/jsd/main.js

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
/vxc/uwxO-8vMSgaKorrjBbcQ1A/surveys.js?1776813169878	`Failed to load resource: net::ERR_NAME_NOT_RESOLVED`
/vxc/kUZ26L84RxSdYa0RqRuEuQ/surveys.js?1776813169922	`Failed to load resource: net::ERR_NAME_NOT_RESOLVED`

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
Mixed content

●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

●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

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

Meta descriptions may be included in search results to concisely summarize page content. Learn more about the meta description.

Why this matters

Performance issues directly impact user engagement and conversion rates.

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 destination	Link Text
zerowaste.dc.gov/	Read More

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.content > div.header-mayor-pic > a > img `div.content > div.header-mayor-pic > a > img`

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

Crawling and Indexing

Search engines may use `href` attributes on links to crawl websites. Ensure that the `href` attribute of anchor elements links to an appropriate destination, so more pages of the site can be discovered. Learn how to make links crawlable

Why this matters

Performance issues directly impact user engagement and conversion rates.

Uncrawlable Link
`div.region-inner > nav.navigation > div.header_search > a`
X `div.content > form#gs2 > div.header_search_form_container > a.close`
Close `div#mobile-main-menu-container > ul#mobile-main-menu > div.close-menu > a`

To appear in search results, crawlers need access to your app.

○Structured data is valid

●Page isn’t blocked from indexing

●Document has a `<title>` element

●Page has successful HTTP status code

●robots.txt is valid

●Document has a valid `hreflang`

●Document has a valid `rel=canonical`