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Performance Report for https://www.mayoclinichealthsystem.org/checksymptoms
Category Audit = performance
The performance audit in Lighthouse consists of several stages:
1. Data collection: Lighthouse launches the browser and loads the web page to collect data about its performance.
2. Metrics analysis: Lighthouse evaluates performance metrics such as page load time, content rendering speed, cache usage, and more. It also provides information on how each metric impacts the user experience.
3. Report: Lighthouse generates a report that contains the results of the performance audit. The report includes a list of recommendations for improving page performance and an assessment of each performance metric.
After conducting the performance audit in Lighthouse, you can use the data and recommendations to optimize your web page's performance and improve the user experience.
| auditthe name of the audit and its description, follow the link for more details | scorethe value of the audit score after the check | valuedetected cause values and check values | details for technician |
|---|---|---|---|
| 🔺bootup-time 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. |
0 | 1.5 s | "[{\"url\": \"https:\/\/dev.visualwebsiteoptimizer.com\/web\/djIkdGU6Ny4wOmFzeW5jJWdxdWVyeQ==\/tag-89c47d4345db0e653df7eb27664fec4f.js\", \"total\": 358.25099999999986, \"scripting\": 324.1598999999998, \"scriptParseCompile\": 2.5932}, {\"url\": \"https:\/\/tagdelivery.mayoclinic.org\/healthsystem\/prod\/utag.js\", \"total\": 162.07379999999998, \"scripting\": 157.4688, \"scriptParseCompile\": 1.5744}, {\"url\": \"https:\/\/dev.visualwebsiteoptimizer.com\/j.php?a=678421&u=https%3A%2F%2Fwww.mayoclinichealthsystem.org%2Fchecksymptoms&f=1&vn=1.4\", \"total\": 154.2258, \"scripting\": 154.0359, \"scriptParseCompile\": 0.126}, {\"url\": \"https:\/\/cdn.decibelinsight.net\/i\/14036\/705830\/di.js\", \"total\": 153.94259999999997, \"scripting\": 129.31709999999995, \"scriptParseCompile\": 6.390300000000001}, {\"url\": \"Unattributable\", \"total\": 143.22299999999933, \"scripting\": 0.5466, \"scriptParseCompile\": 0}, {\"url\": \"https:\/\/aim-tag.hcn.health\/iframe.html?client-origin=https%3A%2F%2Fwww.mayoclinichealthsystem.org&pageview-id=743ef710-02e3-11ef-931c-c3d112ce201b&stps=%7B%7D\", \"total\": 135.57449999999994, \"scripting\": 114.77399999999996, \"scriptParseCompile\": 15.2787}, {\"url\": \"https:\/\/www.mayoclinichealthsystem.org\/Content\/HealthSystemInternet\/js\/vendor\/require.min.js\", \"total\": 132.2424000000001, \"scripting\": 108.73320000000008, \"scriptParseCompile\": 0.105}, {\"url\": \"https:\/\/tagdelivery.mayoclinic.org\/healthsystem\/prod\/utag.13.js?utv=ut4.51.202404021755\", \"total\": 90.9059999999998, \"scripting\": 88.18049999999981, \"scriptParseCompile\": 0.1053}, {\"url\": \"https:\/\/s.go-mpulse.net\/boomerang\/R77RL-8PJY4-PE29E-QAB9Q-FPPHQ\", \"total\": 88.68360000000001, \"scripting\": 87.81210000000002, \"scriptParseCompile\": 0.5829}, {\"url\": \"https:\/\/www.mayoclinichealthsystem.org\/Content\/HealthSystemInternet\/js\/main-mobile.js\", \"total\": 79.05779999999999, \"scripting\": 60.52529999999998, \"scriptParseCompile\": 0.0273}, {\"url\": \"https:\/\/www.medtargetsystem.com\/js\/build\/iframe\/transition.js?1714036140\", \"total\": 77.5602, \"scripting\": 71.74709999999999, \"scriptParseCompile\": 1.119}, {\"url\": \"https:\/\/resources.digital-cloud-west.medallia.com\/wdcwest\/160373\/onsite\/generic1711466374110.js\", \"total\": 73.29719999999999, \"scripting\": 64.5816, \"scriptParseCompile\": 4.0125}, {\"url\": \"https:\/\/solutions.invocacdn.com\/js\/invoca-latest.min.js\", \"total\": 67.5729, \"scripting\": 65.5512, \"scriptParseCompile\": 1.3160999999999998}, {\"url\": \"https:\/\/nexus.ensighten.com\/mayo_clinic\/healthsystemprod\/Bootstrap.js\", \"total\": 57.965699999999984, \"scripting\": 11.8971, \"scriptParseCompile\": 0.6162}, {\"url\": \"https:\/\/www.mayoclinichealthsystem.org\/checksymptoms\", \"total\": 52.59329999999999, \"scripting\": 2.0006999999999997, \"scriptParseCompile\": 0.36540000000000006}]" |
| 🔺first-contentful-paint First Contentful Paint marks the time at which the first text or image is painted. Learn more about the First Contentful Paint metric. |
85 | 2.0 s | "[]" |
| 🔺first-meaningful-paint First Meaningful Paint measures when the primary content of a page is visible. Learn more about the First Meaningful Paint metric. |
95 | 2.0 s | "[]" |
| 🔺interactive 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. |
26 | 10.1 s | "[{\"url\": \"https:\/\/www.mayoclinichealthsystem.org\/checksymptoms\", \"responseTime\": 400.01}]" |
| 🔺largest-contentful-paint Largest Contentful Paint marks the time at which the largest text or image is painted. Learn more about the Largest Contentful Paint metric |
68 | 3.3 s | "[]" |
| 🔺largest-contentful-paint-element This is the largest contentful element painted within the viewport. Learn more about the Largest Contentful Paint element |
0 | 3,340 ms | "[{\"type\": \"table\", \"items\": [{\"node\": {\"lhId\": \"page-0-IMG\", \"path\": \"1,HTML,1,BODY,2,DIV,4,DIV,0,DIV,0,PICTURE,1,IMG\", \"type\": \"node\", \"snippet\": \"<img src=\\\"\/-\/media\/health-system-internet\/hero-banner\/desktop\/general\/check-symptoms\u2026\\\" class=\\\"herobanner__image\\\" alt=\\\"Check Symptoms\\\" style=\\\"opacity: 0.9\\\">\", \"selector\": \"div#mainWrapper > div.herobanner > picture > img.herobanner__image\", \"nodeLabel\": \"Check Symptoms\", \"boundingRect\": {\"top\": 60, \"left\": 0, \"right\": 785, \"width\": 785, \"bottom\": 410, \"height\": 350}}}], \"headings\": [{\"key\": \"node\", \"label\": \"Element\", \"valueType\": \"node\"}]}, {\"type\": \"table\", \"items\": [{\"phase\": \"TTFB\", \"timing\": 796.62, \"percent\": \"24%\"}, {\"phase\": \"Load Delay\", \"timing\": 140.5297178388313, \"percent\": \"4%\"}, {\"phase\": \"Load Time\", \"timing\": 1157.072150104047, \"percent\": \"35%\"}, {\"phase\": \"Render Delay\", \"timing\": 1247.3431320571217, \"percent\": \"37%\"}], \"headings\": [{\"key\": \"phase\", \"label\": \"Phase\", \"valueType\": \"text\"}, {\"key\": \"percent\", \"label\": \"% of LCP\", \"valueType\": \"text\"}, {\"key\": \"timing\", \"label\": \"Timing\", \"valueType\": \"ms\"}]}]" |
| 🔺legacy-javascript 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 |
50 | Potential savings of 31 KiB | "[{\"url\": \"https:\/\/cdn.decibelinsight.net\/i\/14036\/705830\/di.js\", \"subItems\": {\"type\": \"subitems\", \"items\": [{\"signal\": \"Array.prototype.forEach\", \"location\": {\"url\": \"https:\/\/cdn.decibelinsight.net\/i\/14036\/705830\/di.js\", \"line\": 218, \"type\": \"source-location\", \"column\": 29372, \"urlProvider\": \"network\"}}]}, \"totalBytes\": 0, \"wastedBytes\": 12037}, {\"url\": \"https:\/\/cdn.decibelinsight.net\/i\/14036\/705830\/di.js\", \"subItems\": {\"type\": \"subitems\", \"items\": [{\"signal\": \"Array.prototype.forEach\", \"location\": {\"url\": \"https:\/\/cdn.decibelinsight.net\/i\/14036\/705830\/di.js\", \"line\": 218, \"type\": \"source-location\", \"column\": 29372, \"urlProvider\": \"network\"}}]}, \"totalBytes\": 0, \"wastedBytes\": 12037}, {\"url\": \"https:\/\/tagdelivery.mayoclinic.org\/healthsystem\/prod\/utag.1.js?utv=ut4.51.202404021755\", \"subItems\": {\"type\": \"subitems\", \"items\": [{\"signal\": \"Date.prototype.toJSON\", \"location\": {\"url\": \"https:\/\/tagdelivery.mayoclinic.org\/healthsystem\/prod\/utag.1.js?utv=ut4.51.202404021755\", \"line\": 4, \"type\": \"source-location\", \"column\": 46, \"urlProvider\": \"network\"}}]}, \"totalBytes\": 0, \"wastedBytes\": 7373}, {\"url\": \"https:\/\/solutions.invocacdn.com\/js\/invoca-latest.min.js\", \"subItems\": {\"type\": \"subitems\", \"items\": [{\"signal\": \"@babel\/plugin-transform-classes\", \"location\": {\"url\": \"https:\/\/solutions.invocacdn.com\/js\/invoca-latest.min.js\", \"line\": 24, \"type\": \"source-location\", \"column\": 378, \"urlProvider\": \"network\"}}]}, \"totalBytes\": 0, \"wastedBytes\": 79}]" |
| 🔺max-potential-fid 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. |
60 | 220 ms | [] |
| 🔺modern-image-formats 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. |
0 | Potential savings of 41 KiB | ["div#mainWrapper > div.herobanner > picture > img.herobanner__image"] |
| 🔺render-blocking-resources 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. |
0 | Potential savings of 840 ms | "[{\"url\": \"https:\/\/www.mayoclinichealthsystem.org\/Content\/HealthSystemInternet\/css\/jquery-ui.min.css\", \"wastedMs\": 159, \"totalBytes\": 5072}, {\"url\": \"https:\/\/www.mayoclinichealthsystem.org\/Content\/HealthSystemInternet\/css\/mobile.min.css\", \"wastedMs\": 159, \"totalBytes\": 23877}, {\"url\": \"https:\/\/www.mayoclinichealthsystem.org\/Content\/HealthSystemInternet\/js\/vendor\/require.min.js\", \"wastedMs\": 159, \"totalBytes\": 8265}, {\"url\": \"https:\/\/tagdelivery.mayoclinic.org\/healthsystem\/prod\/utag.sync.js\", \"wastedMs\": 965, \"totalBytes\": 640}]" |
| 🔺speed-index Speed Index shows how quickly the contents of a page are visibly populated. Learn more about the Speed Index metric. |
23 | 7.9 s | "[]" |
| 🔺third-party-summary 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. |
0 | Third-party code blocked the main thread for 510 ms | "[{\"entity\": \"VWO\", \"subItems\": {\"type\": \"subitems\", \"items\": [{\"url\": \"https:\/\/dev.visualwebsiteoptimizer.com\/web\/djIkdGU6Ny4wOmFzeW5jJWdxdWVyeQ==\/tag-89c47d4345db0e653df7eb27664fec4f.js\", \"tbtImpact\": 233.00085192137732, \"blockingTime\": 216.6755, \"transferSize\": 52846, \"mainThreadTime\": 358.25100000000015}, {\"url\": \"https:\/\/dev.visualwebsiteoptimizer.com\/j.php?a=678421&u=https%3A%2F%2Fwww.mayoclinichealthsystem.org%2Fchecksymptoms&f=1&vn=1.4\", \"tbtImpact\": 104.0, \"blockingTime\": 103.8124, \"transferSize\": 3564, \"mainThreadTime\": 154.22579999999996}, {\"url\": \"https:\/\/dev.visualwebsiteoptimizer.com\/settings.js?a=678421&settings_type=1&vn=7.0\", \"tbtImpact\": 0, \"blockingTime\": 0, \"transferSize\": 27497, \"mainThreadTime\": 10.8474}, {\"url\": 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| 🔺unused-css-rules 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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| 🔺unused-javascript 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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| 🔺uses-long-cache-ttl A long cache lifetime can speed up repeat visits to your page. Learn more about efficient cache policies. |
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0 | Potential savings of 13 KiB | ["div#mainWrapper > div.herobanner > picture > img.herobanner__image"] |
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