Performance Report for https://www.mayoclinic.org/diseases-conditions

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.

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

["span.cmp-title__no-break > span.cmp-icon > svg > path","div.aem-container > div.aem-GridColumn > div#dcalphabetfacet-1c7fd48223 > ul.cmp-alphabet-facet--inner"]

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

"[]"

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

"[]"

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

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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:\/\/www.mayoclinic.org\/diseases-conditions\", \"responseTime\": 54.625}]"

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

"[]"

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

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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\": \"scriptEvaluation\", \"duration\": 3346.5783000000574, \"groupLabel\": \"Script Evaluation\"}, {\"group\": \"other\", \"duration\": 714.7236000000099, \"groupLabel\": \"Other\"}, {\"group\": \"styleLayout\", \"duration\": 242.11799999999997, \"groupLabel\": \"Style & Layout\"}, {\"group\": \"scriptParseCompile\", \"duration\": 94.65419999999996, \"groupLabel\": \"Script Parsing & Compilation\"}, {\"group\": \"garbageCollection\", \"duration\": 70.45139999999978, \"groupLabel\": \"Garbage Collection\"}, {\"group\": \"parseHTML\", \"duration\": 60.35279999999979, \"groupLabel\": \"Parse HTML & CSS\"}, {\"group\": \"paintCompositeRender\", \"duration\": 50.18759999999997, \"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.

[]

For users on slow connections, external scripts dynamically injected via `document.write()` can delay page load by tens of seconds. Learn how to avoid document.write().

"[{\"source\": {\"url\": \"https:\/\/www.mayoclinic.org\/_next\/static\/chunks\/pages\/_app-d0f76172f0a62513.js\", \"line\": 0, \"type\": \"source-location\", \"column\": 175230, \"urlProvider\": \"network\"}}]"

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.

"[{\"url\": \"https:\/\/tagdelivery.mayoclinic.org\/dotorg-aem\/dev\/utag.sync.js\", \"wastedMs\": 778, \"totalBytes\": 642}]"

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

"[]"

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.

[]

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

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

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

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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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