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Lighthouse Mobile

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

Audit breakdown by category with detailed findings.

34

Performance

Insights

Remove large, duplicate JavaScript modules from bundles to reduce unnecessary bytes consumed by network activity.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Polyfills and transforms enable older browsers to use new JavaScript features. However, many aren't necessary for modern browsers. Consider modifying your JavaScript build process to not transpile Baseline features, unless you know you must support older browsers. Learn why most sites can deploy ES6+ code without transpiling

Why this matters

Performance issues directly impact user engagement and conversion rates.

3rd party code can significantly impact load performance. Reduce and defer loading of 3rd party code to prioritize your page's content.

Why this matters

Performance issues directly impact user engagement and conversion rates.

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

RequestCache TTLTransfer Size
/raqLBDcUp1E8/rcFwkY/VqJiC1/9Q3EJVGO3k3thzciza/KBgHAQ/LAl...21600.0 s162.4 KiB
nexus.ensighten.com/mayo_clinic/clinic_aem_prod/Bootstrap.js300.0 s74.3 KiB
assets.mayoclinic.org/content/dam/cpm-transcend/ui.js5460.0 s83.3 KiB
transcend-cdn.com/cm/03274c75-bbc2-448d-a72f-379289a8e380/airgap.js60.0 s57.6 KiB
xih9lsprjt.kameleoon.io/engine.js14400.0 s71.5 KiB
tagdelivery.mayoclinic.org/dotorg-aem/prod/utag.js300.0 s37.9 KiB
www.mayoclinic.org/_next/static/chunks/pages/_app-e9eb2b17d733a952.js365813.0 s167.2 KiB
tagdelivery.mayoclinic.org/dotorg-aem/prod/utag.36.js?utv=ut4.54.202508071341300.0 s17.2 KiB
tagdelivery.mayoclinic.org/dotorg-aem/prod/utag.2.js?utv=ut4.54.202603302122300.0 s8.9 KiB
www.mayoclinic.org/_next/static/chunks/framework-a6b401aab1c737ef.js466348.0 s49.3 KiB
/content/dam/mayoclinic/images/badges/App_Store_Badge_EN.svg19387.0 s7.1 KiB
www.mayoclinic.org/_next/static/chunks/1508.30cb27dcf6ff94a8.js365814.0 s26.6 KiB
www.mayoclinic.org/_next/static/chunks/main-778d51de2c630e22.js385309.0 s27.4 KiB
s.go-mpulse.net/boomerang/AE377-TGE2S-92GPZ-AE4B3-VR4DY604800.0 s43.3 KiB
assets.mayoclinic.org/content/dam/cpm-transcend/cm.css27852.0 s3.8 KiB
/content/dam/mayoclinic/images/badges/Google_Play_Store_b...15750.0 s3.3 KiB
tagdelivery.mayoclinic.org/dotorg-aem/prod/utag.8.js?utv=ut4.54.202410212136300.0 s2.0 KiB
tagdelivery.mayoclinic.org/dotorg-aem/prod/utag.5.js?utv=ut4.54.202511051642300.0 s1.9 KiB
tagdelivery.mayoclinic.org/dotorg-aem/prod/utag.24.js?utv=ut4.54.202602091708300.0 s1.8 KiB
tagdelivery.mayoclinic.org/dotorg-aem/prod/utag.17.js?utv=ut4.54.202602091708300.0 s1.6 KiB
tagdelivery.mayoclinic.org/dotorg-aem/prod/utag.6.js?utv=ut4.54.202410212136300.0 s1.5 KiB
assets.mayoclinic.org/content/dam/mayoclinic/images/logos/mayo-clinic-logo.svg20043.0 s2.1 KiB
www.mayoclinic.org/_next/static/chunks/250.0e87e38b6eda9d8c.js408941.0 s5.1 KiB
assets.mayoclinic.org/content/dam/mayoclinic/images/icons/giving-charity.svg7098.0 s977 B
www.mayoclinic.org/_next/static/chunks/6314.a6ea5b88b5c724ae.js365816.0 s3.6 KiB
www.mayoclinic.org/_next/static/chunks/2765.88d29488f71f8c08.js398312.0 s3.7 KiB
tagdelivery.mayoclinic.org/dotorg-aem/prod/utag.sync.js300.0 s614 B
www.mayoclinic.org/styles/js/gbs/align-language.js16154.0 s825 B
www.mayoclinic.org/_next/static/chunks/9802.f3a34fcce8d7054e.js385211.0 s3.2 KiB
www.mayoclinic.org/_next/static/chunks/webpack-ea9c59c224bf73d9.js365813.0 s3.1 KiB
www.mayoclinic.org/_next/static/chunks/7778.687f1b806aec4dab.js369228.0 s3.1 KiB
www.mayoclinic.org/_next/static/chunks/7439.dcd229dd39f7c5af.js368806.0 s2.9 KiB
/dotorg-aem/prod/utag.v.js?a=mc/dotorg-aem/202603302121&c...300.0 s513 B
www.mayoclinic.org/_next/static/chunks/3349.fbb7ca6a84ca47db.js365815.0 s2.5 KiB
www.mayoclinic.org/_next/static/chunks/4526.a5cdd12f9c6c7eea.js403927.0 s1.9 KiB
www.mayoclinic.org/_next/static/chunks/338.c3bc386a285fdac8.js365817.0 s1.1 KiB
/_next/static/chunks/pages/[[...slug]]-ace70359570f9ea9.js365813.0 s991 B
www.mayoclinic.org/_next/static/chunks/6642.5288611e77103dcb.js365814.0 s728 B
www.mayoclinic.org/_next/static/cjm9hDl_hxA_CrllorPAu/_buildManifest.js365813.0 s727 B
www.mayoclinic.org/_next/static/cjm9hDl_hxA_CrllorPAu/_ssgManifest.js365814.0 s511 B

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.

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:51.641 source:map[type:text value:[unattributed]]]]

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: Play video
path: 1,HTML,1,BODY,1,DIV,0,DIV,0,DIV,2,DIV,0,MAIN,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV
selector: div.cmp-media > div.cmp-media__asset-container > div.cmp-media-video > div.cmp-media__poster
snippet: <div class="cmp-media__poster" style="background-image: url(&quot;https://assets.mayoclinic.org/content/dam/media/glo…&quot;);">

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.

More than 4 preconnect connections were found. These should be used sparingly and only to the most important origins.
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

Reducing the download time of images can improve the perceived load time of the page and LCP. Learn more about optimizing image size

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLResource SizeEst Savings
Buildings on the Mayo Clinic campus in Jacksonville, Florida. div.cmp-media > div.cmp-media__asset-container > picture > img.cmp-media__image
assets.mayoclinic.org/content/dam/media/global/images/2023/06/26/Florida.png148.2 KiB96.1 KiB
Buildings on the Mayo Clinic campus in Phoenix, Arizona. div.cmp-media > div.cmp-media__asset-container > picture > img.cmp-media__image
assets.mayoclinic.org/content/dam/media/global/images/2023/06/26/Arizona.png98.1 KiB46.0 KiB

Requests are blocking the page's initial render, which may delay LCP. Deferring or inlining can move these network requests out of the critical path.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTransfer Size
/raqLBDcUp1E8/rcFwkY/VqJiC1/9Q3EJVGO3k3thzciza/KBgHAQ/LAl...162.4 KiB
www.mayoclinic.org/mayofonts/Fonts/tajawal/mayo-clinic-fonts-arabic.css621 B
www.mayoclinic.org/mayofonts/Fonts/mayo/fonts.css649 B

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

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.

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 1.4 s
URLTime Spent
mayoclinic.org/1.4 s
www.mayoclinic.org/0.0 ms

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

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: 900 ms 247.6 KiB
URLTransfer SizeEst Savings
/wdcwest/160107/onsite/generic1774895978140.js86.1 KiB43.2 KiB
nexus.ensighten.com/mayo_clinic/clinic_aem_prod/Bootstrap.js73.8 KiB42.6 KiB
www.mayoclinic.org/_next/static/chunks/pages/_app-e9eb2b17d733a952.js166.7 KiB40.1 KiB
assets.mayoclinic.org/content/dam/cpm-transcend/ui.js82.9 KiB37.8 KiB
/raqLBDcUp1E8/rcFwkY/VqJiC1/9Q3EJVGO3k3thzciza/KBgHAQ/LAl...161.3 KiB31.6 KiB
transcend-cdn.com/cm/03274c75-bbc2-448d-a72f-379289a8e380/airgap.js57.3 KiB26.8 KiB
www.mayoclinic.org/_next/static/chunks/framework-a6b401aab1c737ef.js48.9 KiB25.3 KiB

Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to reduce Javascript execution time.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTotal CPU TimeScript EvaluationScript Parse
www.mayoclinic.org/_next/static/chunks/framework-a6b401aab1c737ef.js1.8 s1.5 s27 ms
tagdelivery.mayoclinic.org/dotorg-aem/prod/utag.2.js?utv=ut4.54.2026033021221.5 s1.5 s4.6 ms
Unattributable1.2 s87 ms0.0 ms
tagdelivery.mayoclinic.org/dotorg-aem/prod/utag.js1.2 s1.0 s24 ms
/raqLBDcUp1E8/rcFwkY/VqJiC1/9Q3EJVGO3k3thzciza/KBgHAQ/LAl...1.1 s944 ms85 ms
www.mayoclinic.org/748 ms26 ms5.0 ms
www.mayoclinic.org/_next/static/chunks/pages/_app-e9eb2b17d733a952.js498 ms258 ms169 ms
xih9lsprjt.kameleoon.io/engine.js425 ms341 ms59 ms
nexus.ensighten.com/mayo_clinic/clinic_aem_prod/Bootstrap.js361 ms299 ms43 ms
tagdelivery.mayoclinic.org/dotorg-aem/prod/utag.6.js?utv=ut4.54.202410212136332 ms2.2 ms0.7 ms
assets.mayoclinic.org/content/dam/cpm-transcend/ui.js293 ms200 ms52 ms
/wdcwest/160107/onsite/generic1774895978140.js265 ms152 ms50 ms
s.go-mpulse.net/boomerang/AE377-TGE2S-92GPZ-AE4B3-VR4DY254 ms99 ms20 ms
transcend-cdn.com/cm/03274c75-bbc2-448d-a72f-379289a8e380/airgap.js161 ms127 ms18 ms
www.mayoclinic.org/_next/static/chunks/main-778d51de2c630e22.js86 ms67 ms18 ms

Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to minimize main-thread work

Why this matters

Performance issues directly impact user engagement and conversion rates.

CategoryTime Spent
Script Evaluation7.0 s
Other1.6 s
Script Parsing & Compilation641 ms
Style & Layout526 ms
Garbage Collection425 ms
Parse HTML & CSS301 ms
Rendering187 ms

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 reasonFailure type
The page has an unload handler in the main frame.Actionable

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 44.9 KiB
URLTransfer SizeEst Savings
.aem-Grid{display:block;width:auto} …34.9 KiB34.2 KiB
.cmp-column-control__container{-webkit-margin-start:var(--mc-spacing-1-5x); … } …12.1 KiB10.8 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
Android App on Google Play div#image-38c2e437cf > div.cmp-link > a.cmp-anchor--plain > img.cmp-image__image
/content/dam/mayoclinic/images/badges/Google_Play_Store_b...
Apple Download on the App Store div#image-c0db523039 > div.cmp-link > a.cmp-anchor--plain > img.cmp-image__image
/content/dam/mayoclinic/images/badges/App_Store_Badge_EN.svg
Mayo Clinic Home Page div#header__mobile-logo > div.cmp-link > a.cmp-anchor--plain > img.cmp-image__image
assets.mayoclinic.org/content/dam/mayoclinic/images/logos/mayo-clinic-logo.svg

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

●Layout shift culprits
●Optimize DOM size
●Font display
●LCP breakdown
●Modern HTTP
●Optimize viewport for mobile
●Minify CSS
●Minify JavaScript
●Avoids enormous network payloads Total size was 1,920 KiB
●User Timing marks and measures 4 user timings
●Avoid long main-thread tasks 20 long tasks found
●Network Requests
●Network Round Trip Times 250 ms
●Server Backend Latencies 510 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Initial server response time was short Root document took 30 ms
●Avoid large layout shifts 2 layout shifts found
○INP breakdown
○Avoid non-composited animations
100

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.

○Interactive controls are keyboard focusable
○Interactive elements indicate their purpose and state
○The page has a logical tab order
○Visual order on the page follows DOM order
○User focus is not accidentally trapped in a region
○The user's focus is directed to new content added to the page
○HTML5 landmark elements are used to improve navigation
○Offscreen content is hidden from assistive technology
○Custom controls have associated labels
○Custom controls have ARIA roles
●`[aria-*]` attributes match their roles
●`[aria-hidden="true"]` is not present on the document `<body>`
●`[role]`s have all required `[aria-*]` attributes
●`[role]` values are valid
●`[aria-*]` attributes have valid values
●`[aria-*]` attributes are valid and not misspelled
●Buttons have an accessible name
●Image elements have `[alt]` attributes
●Form elements have associated labels
●`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
●ARIA attributes are used as specified for the element's role
●Elements with `role="dialog"` or `role="alertdialog"` have accessible names.
●`[aria-hidden="true"]` elements do not contain focusable descendents
●Elements use only permitted ARIA attributes
●Elements with the `role=text` attribute do not have focusable descendents.
●Background and foreground colors have a sufficient contrast ratio
●Document has a `<title>` element
●`<html>` element has a `[lang]` attribute
●`<html>` element has a valid value for its `[lang]` attribute
●Links are distinguishable without relying on color.
●Links have a discernible name
●Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
●List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements
●No element has a `[tabindex]` value greater than 0
●Touch targets have sufficient size and spacing.
●Heading elements appear in a sequentially-descending order
●Skip links are focusable.
●Document has a main landmark.
●Deprecated ARIA roles were not used
●Elements with visible text labels have matching accessible names.
○`[accesskey]` values are unique
○`button`, `link`, and `menuitem` elements have accessible names
○ARIA input fields have accessible names
○ARIA `meter` elements have accessible names
○ARIA `progressbar` elements have accessible names
○Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
○`[role]`s are contained by their required parent element
○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
○`<frame>` or `<iframe>` elements have a title
○`<html>` element has an `[xml:lang]` attribute with the same base language as the `[lang]` attribute.
○Input buttons have discernible text.
○`<input type="image">` elements have `[alt]` text
○The document does not use `<meta http-equiv="refresh">`
○`<object>` elements have alternate text
○Select elements have associated label elements.
○Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
○`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.
○`[lang]` attributes have a valid value
○`<video>` elements contain a `<track>` element with `[kind="captions"]`
○Tables have different content in the summary attribute and `<caption>`.
○All heading elements contain content.
○Uses ARIA roles only on compatible elements
○Image elements do not have `[alt]` attributes that are redundant text.
○Identical links have the same purpose.
○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.
81

Best Practices

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 / WarningSource
Unload event listeners are deprecated and will be removed.
tagdelivery.mayoclinic.org/dotorg-aem/prod/utag.36.js?utv=ut4.54.202508071341 line 6, col 4083

Source maps translate minified code to the original source code. This helps developers debug in production. In addition, Lighthouse is able to provide further insights. Consider deploying source maps to take advantage of these benefits. Learn more about source maps.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL
/raqLBDcUp1E8/rcFwkY/VqJiC1/9Q3EJVGO3k3thzciza/KBgHAQ/LAl...
www.mayoclinic.org/_next/static/chunks/pages/_app-e9eb2b17d733a952.js
●Uses HTTPS
●Avoids third-party cookies
●Allows users to paste into input fields
●Avoids requesting the geolocation permission on page load
●Avoids requesting the notification permission on page load
●Displays images with correct aspect ratio
●Serves images with appropriate resolution
●Page has the HTML doctype
●Properly defines charset
●No browser errors logged to the console
●No issues in the `Issues` panel in Chrome Devtools
●Ensure CSP is effective against XSS attacks
●Use a strong HSTS policy
●Ensure proper origin isolation with COOP
●Mitigate DOM-based XSS with Trusted Types
●Detected JavaScript libraries
○Redirects HTTP traffic to HTTPS
○Mitigate clickjacking with XFO or CSP
92

SEO

These checks ensure that your page is following basic search engine optimization advice. There are many additional factors Lighthouse does not score here that may affect your search ranking, including performance on Core Web Vitals. Learn more about Google Search Essentials.

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
Manage Cookies ul.cmp-list__container > li.cmp-list__item > div.cmp-link > a#privacyManageCookies
Manage Cookies ul.cmp-list__container > li.cmp-list__item > div.cmp-link > a#privacyManageCookiesMobile

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
●Document has a meta description
●Page has successful HTTP status code
●Links have descriptive text
●robots.txt is valid
●Image elements have `[alt]` attributes
●Document has a valid `hreflang`
●Document has a valid `rel=canonical`

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