Performance Report for https://www.nyulangone.org/locations/hassenfeld-childrens-hospital

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.

"[{\"url\": \"https:\/\/players.brightcove.net\/3714047748001\/r1hh9Z1aM_default\/index.min.js\", \"total\": 1056.577800000006, \"scripting\": 598.8540000000002, \"scriptParseCompile\": 18.6489}, {\"url\": \"https:\/\/assets.adobedtm.com\/4c3ce9af52b5\/7f1c344e7102\/launch-fba51af5855b.min.js\", \"total\": 949.2726000000008, \"scripting\": 577.1952000000005, \"scriptParseCompile\": 25.21889999999999}, {\"url\": \"https:\/\/nyulangone.org\/bundles\/nyulangonefrontend\/assets\/js\/hassenfeld.js?ARTIFACT_VERSION=5.42-build.4792.ecf7b0e\", \"total\": 804.8540999999999, \"scripting\": 150.39030000000005, \"scriptParseCompile\": 26.5782}, {\"url\": \"https:\/\/nyulangone.org\/locations\/hassenfeld-childrens-hospital\", \"total\": 633.6899999999998, \"scripting\": 17.086800000000004, \"scriptParseCompile\": 4.242}, {\"url\": \"Unattributable\", \"total\": 297.10529999999903, \"scripting\": 12.471900000000002, \"scriptParseCompile\": 0}, {\"url\": \"https:\/\/nyulangone.org\/s3-nav\/v1\/hch\/latest\/hch\/privacy_banner\/index.js\", \"total\": 210.3165, \"scripting\": 19.873499999999993, \"scriptParseCompile\": 4.5009}, {\"url\": \"https:\/\/www.googletagmanager.com\/gtag\/destination?id=DC-5777706&l=dataLayer&cx=c\", \"total\": 117.1356, \"scripting\": 110.4468, \"scriptParseCompile\": 2.2479}, {\"url\": \"https:\/\/nyulangone.org\/s3-nav\/v1\/hch\/latest\/hch\/footer\/index.js\", \"total\": 103.20989999999998, \"scripting\": 9.045000000000002, \"scriptParseCompile\": 0.294}, {\"url\": \"https:\/\/nyulmc.demdex.net\/dest5.html?d_nsid=0#https%3A%2F%2Fnyulangone.org\", \"total\": 54.87929999999999, \"scripting\": 54.3186, \"scriptParseCompile\": 0.3465}, {\"url\": \"https:\/\/nyulangone.org\/s3-nav\/v1\/hch\/latest\/hch\/header\/index.js\", \"total\": 53.55780000000001, \"scripting\": 16.664100000000005, \"scriptParseCompile\": 1.9416}]"

Cumulative Layout Shift measures the movement of visible elements within the viewport. Learn more about the Cumulative Layout Shift metric.

"[{\"newEngineResult\": {\"cumulativeLayoutShift\": 0.0839171974522293, \"cumulativeLayoutShiftMainFrame\": 0.0839171974522293}, \"newEngineResultDiffered\": false, \"cumulativeLayoutShiftMainFrame\": 0.0839171974522293}]"

A large DOM will increase memory usage, cause longer style calculations, and produce costly layout reflows. Learn how to avoid an excessive DOM size.

["fieldset.vjs-fg-color > span.vjs-text-opacity > select > option#captions-foreground-opacity-bc-6264725748001-hero_component_409-Opaque","body.page"]

First Contentful Paint marks the time at which the first text or image is painted. Learn more about the First Contentful Paint metric.

"[{\"url\": \"http:\/\/manifest.prod.boltdns.net\/thumbnail\/v1\/3714047748001\/0821df37-c0f3-4531-b94d-3a5b87c115a8\/4ada5906-ef2a-48d2-85f6-0110c01d5757\/thumbnail.webvtt?fastly_token=NjYyOThlZjVfNjZhMGNmNmJiOGE2NWJlNTAyNGM2MDFiNjY5ODg0OGY1YmI5ZTllNTZkMzRhMGExOWRmNGM0MjlhZjI5Y2VjOA%3D%3D\", \"resolution\": \"Blocked\"}, {\"url\": \"http:\/\/manifest.prod.boltdns.net\/thumbnail\/v1\/3714047748001\/0e684d65-6f28-4068-90f1-e8de26a5090e\/c34571ab-b03f-4ec7-b2c4-d18715975f18\/thumbnail.webvtt?fastly_token=NjYyOThmYmRfM2E0OWMwNGNkZjU0ZDZjMzI1MjQyZGJiMWY1NmZlMWI1YTljOTI2NTA5MTdlMzY1M2JmZThlZDQxMjZlNDMwNg%3D%3D\", \"resolution\": \"Blocked\"}]"

First Meaningful Paint measures when the primary content of a page is visible. Learn more about the First Meaningful Paint metric.

"[{\"url\": \"http:\/\/manifest.prod.boltdns.net\/thumbnail\/v1\/3714047748001\/0821df37-c0f3-4531-b94d-3a5b87c115a8\/4ada5906-ef2a-48d2-85f6-0110c01d5757\/thumbnail.webvtt?fastly_token=NjYyOThlZjVfNjZhMGNmNmJiOGE2NWJlNTAyNGM2MDFiNjY5ODg0OGY1YmI5ZTllNTZkMzRhMGExOWRmNGM0MjlhZjI5Y2VjOA%3D%3D\", \"resolution\": \"Blocked\"}, {\"url\": \"http:\/\/manifest.prod.boltdns.net\/thumbnail\/v1\/3714047748001\/0e684d65-6f28-4068-90f1-e8de26a5090e\/c34571ab-b03f-4ec7-b2c4-d18715975f18\/thumbnail.webvtt?fastly_token=NjYyOThmYmRfM2E0OWMwNGNkZjU0ZDZjMzI1MjQyZGJiMWY1NmZlMWI1YTljOTI2NTA5MTdlMzY1M2JmZThlZDQxMjZlNDMwNg%3D%3D\", \"resolution\": \"Blocked\"}]"

Leverage the `font-display` CSS feature to ensure text is user-visible while webfonts are loading. Learn more about `font-display`.

"[{\"url\": \"https:\/\/nyulangone.org\/bundles\/nyulangonefrontend\/assets\/fonts\/benton\/bentonsans-regular.woff\", \"wastedMs\": 428.29699993133545}, {\"url\": \"https:\/\/nyulangone.org\/bundles\/nyulangonefrontend\/assets\/fonts\/metric\/MetricWeb-Bold.woff\", \"wastedMs\": 583.8020000457764}, {\"url\": \"https:\/\/nyulangone.org\/bundles\/nyulangonefrontend\/assets\/fonts\/utopia\/UtopiaStd-Regular.ttf\", \"wastedMs\": 584.7610001564026}, {\"url\": \"https:\/\/nyulangone.org\/s3-nav\/v1\/hch\/latest\/shared\/common\/fonts\/awesome\/fontawesome-webfont.woff\", \"wastedMs\": 650.7379999160767}, {\"url\": \"https:\/\/nyulangone.org\/s3-nav\/v1\/hch\/latest\/shared\/common\/fonts\/benton\/bentonsans-bold.woff\", \"wastedMs\": 598.8219995498657}, {\"url\": \"https:\/\/nyulangone.org\/s3-nav\/v1\/hch\/latest\/shared\/common\/fonts\/benton\/bentonsans-medium.woff\", \"wastedMs\": 1128.031000137329}, {\"url\": \"https:\/\/nyulangone.org\/s3-nav\/v1\/hch\/latest\/shared\/common\/fonts\/metric\/MetricWeb-Regular.woff\", \"wastedMs\": 1073.3790001869202}, {\"url\": \"https:\/\/nyulangone.org\/s3-nav\/v1\/hch\/latest\/shared\/common\/fonts\/metric\/MetricWeb-Medium.woff\", \"wastedMs\": 1072.3410005569458}, {\"url\": \"https:\/\/nyulangone.org\/s3-nav\/v1\/hch\/latest\/shared\/common\/fonts\/benton\/bentonsans-regular.woff\", \"wastedMs\": 1072.762000083923}, {\"url\": \"https:\/\/nyulangone.org\/bundles\/nyulangonefrontend\/assets\/fonts\/metric\/MetricWeb-Medium.woff\", \"wastedMs\": 544.8480000495911}, {\"url\": \"https:\/\/nyulangone.org\/bundles\/nyulangonefrontend\/assets\/fonts\/awesome\/fontawesome-webfont.woff\", \"wastedMs\": 552.4869999885559}, {\"url\": \"https:\/\/nyulangone.org\/bundles\/nyulangonefrontend\/assets\/fonts\/utopia\/UtopiaStd-Bold.ttf\", \"wastedMs\": 550.0560002326965}, {\"url\": \"https:\/\/nyulangone.org\/bundles\/nyulangonefrontend\/assets\/fonts\/metric\/MetricWeb-Regular.woff\", \"wastedMs\": 548.1280002593994}, {\"url\": \"https:\/\/nyulangone.org\/bundles\/nyulangonefrontend\/assets\/fonts\/metric\/MetricWeb-Semibold.woff\", \"wastedMs\": 987.3010001182556}]"

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.

"[{\"url\": \"https:\/\/nyulangone.org\/locations\/hassenfeld-childrens-hospital\", \"responseTime\": 125.483}]"

Largest Contentful Paint marks the time at which the largest text or image is painted. Learn more about the Largest Contentful Paint metric

"[{\"url\": \"http:\/\/manifest.prod.boltdns.net\/thumbnail\/v1\/3714047748001\/0821df37-c0f3-4531-b94d-3a5b87c115a8\/4ada5906-ef2a-48d2-85f6-0110c01d5757\/thumbnail.webvtt?fastly_token=NjYyOThlZjVfNjZhMGNmNmJiOGE2NWJlNTAyNGM2MDFiNjY5ODg0OGY1YmI5ZTllNTZkMzRhMGExOWRmNGM0MjlhZjI5Y2VjOA%3D%3D\", \"resolution\": \"Blocked\"}, {\"url\": \"http:\/\/manifest.prod.boltdns.net\/thumbnail\/v1\/3714047748001\/0e684d65-6f28-4068-90f1-e8de26a5090e\/c34571ab-b03f-4ec7-b2c4-d18715975f18\/thumbnail.webvtt?fastly_token=NjYyOThmYmRfM2E0OWMwNGNkZjU0ZDZjMzI1MjQyZGJiMWY1NmZlMWI1YTljOTI2NTA5MTdlMzY1M2JmZThlZDQxMjZlNDMwNg%3D%3D\", \"resolution\": \"Blocked\"}]"

This is the largest contentful element painted within the viewport. Learn more about the Largest Contentful Paint element

"[{\"type\": \"table\", \"items\": [{\"node\": {\"lhId\": \"page-0-IMG\", \"path\": \"4,HTML,2,BODY,5,MAIN,0,DIV,0,DIV,0,DIV,1,SECTION,0,DIV,0,DIV,0,DIV,0,DIV,1,DIV,0,IMG\", \"type\": \"node\", \"snippet\": \"<img class=\\\"video-background__poster objectfit\\\" src=\\\"\/files\/hassenfeld-childrens-hospital-hero-rev.jpg\\\" alt=\\\"Reception at Hassenfeld Children's Hospital\\\" aria-hidden=\\\"true\\\">\", \"selector\": \"div.hero-video > div.video-background > div.video-background__obstruction > img.video-background__poster\", \"nodeLabel\": \"Reception at Hassenfeld Children's Hospital\", \"boundingRect\": {\"top\": 388, \"left\": 0, \"right\": 785, \"width\": 785, \"bottom\": 688, \"height\": 300}}}], \"headings\": [{\"key\": \"node\", \"label\": \"Element\", \"valueType\": \"node\"}]}, {\"type\": \"table\", \"items\": [{\"phase\": \"TTFB\", \"timing\": 939.9019995117188, \"percent\": \"2%\"}, {\"phase\": \"Load Delay\", \"timing\": 3224.705992672697, \"percent\": \"8%\"}, {\"phase\": \"Load Time\", \"timing\": 29354.97656754304, \"percent\": \"72%\"}, {\"phase\": \"Render Delay\", \"timing\": 7435.381440272533, \"percent\": \"18%\"}], \"headings\": [{\"key\": \"phase\", \"label\": \"Phase\", \"valueType\": \"text\"}, {\"key\": \"percent\", \"label\": \"% of LCP\", \"valueType\": \"text\"}, {\"key\": \"timing\", \"label\": \"Timing\", \"valueType\": \"ms\"}]}]"

Polyfills and transforms enable legacy browsers to use new JavaScript features. However, many aren't necessary for modern browsers. For your bundled JavaScript, adopt a modern script deployment strategy using module/nomodule feature detection to reduce the amount of code shipped to modern browsers, while retaining support for legacy browsers. Learn how to use modern JavaScript

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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

"[{\"group\": \"other\", \"duration\": 1686.556500000009, \"groupLabel\": \"Other\"}, {\"group\": \"scriptEvaluation\", \"duration\": 1647.9735000000069, \"groupLabel\": \"Script Evaluation\"}, {\"group\": \"styleLayout\", \"duration\": 864.5096999999992, \"groupLabel\": \"Style & Layout\"}, {\"group\": \"scriptParseCompile\", \"duration\": 94.84349999999998, \"groupLabel\": \"Script Parsing & Compilation\"}, {\"group\": \"parseHTML\", \"duration\": 64.61099999999989, \"groupLabel\": \"Parse HTML & CSS\"}, {\"group\": \"garbageCollection\", \"duration\": 39.40589999999998, \"groupLabel\": \"Garbage Collection\"}, {\"group\": \"paintCompositeRender\", \"duration\": 27.412500000000055, \"groupLabel\": \"Rendering\"}]"

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.

[]

Image formats like WebP and AVIF often provide better compression than PNG or JPEG, which means faster downloads and less data consumption. Learn more about modern image formats.

["div.hero-video > div.video-background > div.video-background__obstruction > img.video-background__poster","div.content__main > div.callout-media-wrapper > div.callout-media-wrapper__helper > img.callout-media-wrapper__image","div.news-related__container > div.news-related__item > div.news-tile > div.news-tile__thumb","div.nyumc-branded-player-wrapper--default > div.content-video > div#bc-6331481733112-callout > div.vjs-poster","div.nyumc-branded-player-wrapper--fullwidth > div.content-video > div#bc-6264725748001-hero > div.vjs-poster","div.news-related__container > div.news-related__item > div.news-tile > div.news-tile__thumb","div.image-callout > div.image-callout__full-image-block > div.image-callout__image-wrapper > img.image-callout__image"]

Consider lazy-loading offscreen and hidden images after all critical resources have finished loading to lower time to interactive. Learn how to defer offscreen images.

["div.news-related__container > div.news-related__item > div.news-tile > div.news-tile__thumb","div.nyumc-branded-player-wrapper--default > div.content-video > div#bc-6331481733112-callout > div.vjs-poster","div.nyumc-branded-player-wrapper--fullwidth > div.content-video > div#bc-6264725748001-hero > div.vjs-poster","div.news-related__container > div.news-related__item > div.news-tile > div.news-tile__thumb","div.news-related__container > div.news-related__item > div.news-tile > div.news-tile__thumb","div.news-related__container > div.news-related__item > div.news-tile > div.news-tile__thumb","div.news-related__container > div.news-related__item > div.news-tile > div.news-tile__thumb","div.news-related__container > div.news-related__item > div.news-tile > div.news-tile__thumb","div.news-related__container > div.news-related__item > div.news-tile > div.news-tile__thumb","div.news-related__container > div.news-related__item > div.news-tile > div.news-tile__thumb","div.news-related__container > div.news-related__item > div.news-tile > div.news-tile__thumb"]

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

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Resources are blocking the first paint of your page. Consider delivering critical JS/CSS inline and deferring all non-critical JS/styles. Learn how to eliminate render-blocking resources.

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Speed Index shows how quickly the contents of a page are visibly populated. Learn more about the Speed Index metric.

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Third-party code can significantly impact load performance. Limit the number of redundant third-party providers and try to load third-party code after your page has primarily finished loading. Learn how to minimize third-party impact.

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Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds. Learn more about the Total Blocking Time metric.

[]

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

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

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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.

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

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HTTP/2 offers many benefits over HTTP/1.1, including binary headers and multiplexing. Learn more about HTTP/2.

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

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Optimized images load faster and consume less cellular data. Learn how to efficiently encode images.

["div.hero-video > div.video-background > div.video-background__obstruction > img.video-background__poster","div.content__main > div.callout-media-wrapper > div.callout-media-wrapper__helper > img.callout-media-wrapper__image","div.nyumc-branded-player-wrapper--default > div.content-video > div#bc-6331481733112-callout > div.vjs-poster","div.nyumc-branded-player-wrapper--fullwidth > div.content-video > div#bc-6264725748001-hero > div.vjs-poster"]

Consider adding `preconnect` or `dns-prefetch` resource hints to establish early connections to important third-party origins. Learn how to preconnect to required origins.

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Serve images that are appropriately-sized to save cellular data and improve load time. Learn how to size images.

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Text-based resources should be served with compression (gzip, deflate or brotli) to minimize total network bytes. Learn more about text compression.

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