Performance Report for http://www.ucsfhealth.org/mychart

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

"[{\"newEngineResult\": {\"cumulativeLayoutShift\": 0.1065201270570146, \"cumulativeLayoutShiftMainFrame\": 0.0014527067723140584}, \"newEngineResultDiffered\": false, \"cumulativeLayoutShiftMainFrame\": 0.0014527067723140584}]"

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:\/\/www.ucsfhealth.org\/mychart\", \"resolution\": \"Allowed\"}]"

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

"[{\"url\": \"http:\/\/www.ucsfhealth.org\/mychart\", \"resolution\": \"Allowed\"}]"

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

"[{\"url\": \"https:\/\/www.ucsfhealth.org\/assets\/ucsf\/fonts\/3a46542f-f429-4821-9a88-62e3be54a640.woff2\", \"wastedMs\": 227.36899995803833}, {\"url\": \"https:\/\/www.ucsfhealth.org\/assets\/ucsf\/fonts\/5b1fbd62-45dc-4433-a7df-a2b24a146411.woff2\", \"wastedMs\": 411.8519997596741}, {\"url\": \"https:\/\/www.ucsfhealth.org\/assets\/ucsf\/fonts\/icomoon.ttf\", \"wastedMs\": 340.3420000076294}, {\"url\": \"https:\/\/www.ucsfhealth.org\/assets\/ucsf\/fonts\/cb249624-c6ac-4fa8-84a6-921dc1627b9c.woff2\", \"wastedMs\": 265.1840000152588}, {\"url\": \"https:\/\/www.ucsfhealth.org\/assets\/ucsf\/fonts\/5661f5e8-4294-4956-b6d5-acb6c42277a7.woff2\", \"wastedMs\": 102.41200017929076}, {\"url\": \"https:\/\/ucsfmychart.ucsfmedicalcenter.org\/UCSFMyChart\/fonts\/sourcesanspro-regular-webfont.woff2\", \"wastedMs\": 960.6180000305176}]"

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.ucsfhealth.org\/mychart\", \"responseTime\": 575.058}]"

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:\/\/www.ucsfhealth.org\/mychart\", \"resolution\": \"Allowed\"}]"

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-DIV\", \"path\": \"5,HTML,2,BODY,1,DIV,0,HEADER,0,DIV,1,DIV,0,DIV,1,DIV\", \"type\": \"node\", \"snippet\": \"<div class=\\\"nav-wrapper\\\">\", \"selector\": \"div#header > div.component > div.component-content > div.nav-wrapper\", \"nodeLabel\": \"mobile_nav_toggle\", \"boundingRect\": {\"top\": 0, \"left\": 0, \"right\": 785, \"width\": 785, \"bottom\": 50, \"height\": 50}}}], \"headings\": [{\"key\": \"node\", \"label\": \"Element\", \"valueType\": \"node\"}]}, {\"type\": \"table\", \"items\": [{\"phase\": \"TTFB\", \"timing\": 800.967, \"percent\": \"12%\"}, {\"phase\": \"Load Delay\", \"timing\": 3620.753224817429, \"percent\": \"56%\"}, {\"phase\": \"Load Time\", \"timing\": 933.6235806150398, \"percent\": \"14%\"}, {\"phase\": \"Render Delay\", \"timing\": 1140.769694567531, \"percent\": \"18%\"}], \"headings\": [{\"key\": \"phase\", \"label\": \"Phase\", \"valueType\": \"text\"}, {\"key\": \"percent\", \"label\": \"% of LCP\", \"valueType\": \"text\"}, {\"key\": \"timing\", \"label\": \"Timing\", \"valueType\": \"ms\"}]}]"

These DOM elements contribute most to the CLS of the page. Learn how to improve CLS

["div#wrap > div#content > main#main > div.login","div#wrap > div#content > main#main > div.signup","div.login > form#loginForm > div.formcontents > input#submit","div#wrap > div#content > main#main > footer#footer","div.login > form#loginForm > div.formcontents > div.ghostInput","div","div#content > main#main > div.signup > a.button","form#loginForm > div.formcontents > div.recovery > a","div.form-wrapper > div.form-account-links-wrapper > div.create-account-links > div","div.form-account-links-wrapper > div.create-account-links > div > a","div.form-account-links-wrapper > div.create-account-links > div > a","div.nav-wrapper > div.main-nav-wrapper > div.main-nav > div.logo","div.form-wrapper > div.form-account-links-wrapper > div.create-account-links > div.eyebrow"]

["div#wrap > div#content > main#main > div.login","div.login > form#loginForm > div.formcontents > input#submit","div#content > main#main > div.signup > a.button","div.form-wrapper > div.form-account-links-wrapper > div.create-account-links > div"]

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

"[{\"url\": \"https:\/\/ucsfmychart.ucsfmedicalcenter.org\/UCSFMyChart\/bundles\/core-3-en-US?v=43-2AAgKW6IN7sPDX8TGjntVKiXbgoPFPF8Of5YKnbQ1\", \"subItems\": {\"type\": \"subitems\", \"items\": [{\"signal\": \"Array.prototype.forEach\", \"location\": {\"url\": \"https:\/\/ucsfmychart.ucsfmedicalcenter.org\/UCSFMyChart\/bundles\/core-3-en-US?v=43-2AAgKW6IN7sPDX8TGjntVKiXbgoPFPF8Of5YKnbQ1\", \"line\": 0, \"type\": \"source-location\", \"column\": 79673, \"urlProvider\": \"network\"}}]}, \"totalBytes\": 0, \"wastedBytes\": 31011}, {\"url\": \"https:\/\/www.ucsfhealth.org\/mychart\", \"subItems\": {\"type\": \"subitems\", \"items\": [{\"signal\": \"@babel\/plugin-transform-classes\", \"location\": {\"url\": \"https:\/\/www.ucsfhealth.org\/mychart\", \"line\": 2, \"type\": \"source-location\", \"column\": 2014, \"urlProvider\": \"network\"}}, {\"signal\": \"Array.prototype.fill\", \"location\": {\"url\": \"https:\/\/www.ucsfhealth.org\/mychart\", \"line\": 2, \"type\": \"source-location\", \"column\": 307081, \"urlProvider\": \"network\"}}, {\"signal\": \"Array.prototype.filter\", \"location\": {\"url\": \"https:\/\/www.ucsfhealth.org\/mychart\", \"line\": 2, \"type\": \"source-location\", \"column\": 307185, \"urlProvider\": \"network\"}}, {\"signal\": \"Array.prototype.find\", \"location\": {\"url\": \"https:\/\/www.ucsfhealth.org\/mychart\", \"line\": 2, \"type\": \"source-location\", \"column\": 307434, \"urlProvider\": \"network\"}}, {\"signal\": \"Array.prototype.findIndex\", \"location\": {\"url\": \"https:\/\/www.ucsfhealth.org\/mychart\", \"line\": 2, \"type\": \"source-location\", \"column\": 307686, \"urlProvider\": \"network\"}}, {\"signal\": \"Array.prototype.forEach\", \"location\": {\"url\": \"https:\/\/www.ucsfhealth.org\/mychart\", \"line\": 2, \"type\": \"source-location\", \"column\": 308352, \"urlProvider\": \"network\"}}, {\"signal\": \"Array.from\", \"location\": {\"url\": \"https:\/\/www.ucsfhealth.org\/mychart\", \"line\": 2, \"type\": \"source-location\", \"column\": 308451, \"urlProvider\": \"network\"}}, {\"signal\": \"Array.isArray\", \"location\": {\"url\": \"https:\/\/www.ucsfhealth.org\/mychart\", \"line\": 2, \"type\": \"source-location\", \"column\": 309014, \"urlProvider\": \"network\"}}, {\"signal\": \"Array.prototype.map\", \"location\": {\"url\": \"https:\/\/www.ucsfhealth.org\/mychart\", \"line\": 2, \"type\": \"source-location\", \"column\": 309424, \"urlProvider\": \"network\"}}, {\"signal\": \"Array.prototype.some\", \"location\": {\"url\": \"https:\/\/www.ucsfhealth.org\/mychart\", \"line\": 2, \"type\": \"source-location\", \"column\": 311114, \"urlProvider\": \"network\"}}, {\"signal\": \"Date.now\", \"location\": {\"url\": \"https:\/\/www.ucsfhealth.org\/mychart\", \"line\": 2, \"type\": \"source-location\", \"column\": 314949, \"urlProvider\": \"network\"}}, {\"signal\": \"Date.prototype.toISOString\", \"location\": {\"url\": \"https:\/\/www.ucsfhealth.org\/mychart\", \"line\": 2, \"type\": \"source-location\", \"column\": 315370, \"urlProvider\": \"network\"}}, {\"signal\": \"Number.isInteger\", \"location\": {\"url\": \"https:\/\/www.ucsfhealth.org\/mychart\", \"line\": 2, \"type\": \"source-location\", \"column\": 322190, \"urlProvider\": \"network\"}}, {\"signal\": \"Number.isSafeInteger\", \"location\": {\"url\": \"https:\/\/www.ucsfhealth.org\/mychart\", \"line\": 2, \"type\": \"source-location\", \"column\": 322510, \"urlProvider\": \"network\"}}, {\"signal\": \"Object.defineProperties\", \"location\": {\"url\": \"https:\/\/www.ucsfhealth.org\/mychart\", \"line\": 2, \"type\": \"source-location\", \"column\": 324986, \"urlProvider\": \"network\"}}, {\"signal\": \"Object.defineProperty\", \"location\": {\"url\": \"https:\/\/www.ucsfhealth.org\/mychart\", \"line\": 2, \"type\": \"source-location\", \"column\": 325095, \"urlProvider\": \"network\"}}, {\"signal\": \"Object.entries\", \"location\": {\"url\": \"https:\/\/www.ucsfhealth.org\/mychart\", \"line\": 2, \"type\": \"source-location\", \"column\": 325425, \"urlProvider\": \"network\"}}, {\"signal\": \"Object.freeze\", \"location\": {\"url\": \"https:\/\/www.ucsfhealth.org\/mychart\", \"line\": 2, \"type\": \"source-location\", \"column\": 325573, \"urlProvider\": \"network\"}}, {\"signal\": \"Object.getOwnPropertyDescriptors\", \"location\": {\"url\": \"https:\/\/www.ucsfhealth.org\/mychart\", \"line\": 2, \"type\": \"source-location\", \"column\": 326113, \"urlProvider\": \"network\"}}, {\"signal\": \"Object.getPrototypeOf\", \"location\": {\"url\": \"https:\/\/www.ucsfhealth.org\/mychart\", \"line\": 2, \"type\": \"source-location\", \"column\": 326510, \"urlProvider\": \"network\"}}, {\"signal\": \"Object.isExtensible\", \"location\": {\"url\": \"https:\/\/www.ucsfhealth.org\/mychart\", \"line\": 2, \"type\": \"source-location\", \"column\": 326747, \"urlProvider\": \"network\"}}, {\"signal\": \"Object.isFrozen\", \"location\": {\"url\": \"https:\/\/www.ucsfhealth.org\/mychart\", \"line\": 2, \"type\": \"source-location\", \"column\": 326919, \"urlProvider\": \"network\"}}, {\"signal\": \"Object.isSealed\", \"location\": {\"url\": \"https:\/\/www.ucsfhealth.org\/mychart\", \"line\": 2, \"type\": \"source-location\", \"column\": 327085, \"urlProvider\": \"network\"}}, {\"signal\": \"Object.keys\", \"location\": {\"url\": \"https:\/\/www.ucsfhealth.org\/mychart\", \"line\": 2, \"type\": \"source-location\", \"column\": 327234, \"urlProvider\": \"network\"}}, {\"signal\": \"Object.preventExtensions\", \"location\": {\"url\": \"https:\/\/www.ucsfhealth.org\/mychart\", \"line\": 2, \"type\": \"source-location\", \"column\": 327887, \"urlProvider\": \"network\"}}, {\"signal\": \"Object.seal\", \"location\": {\"url\": \"https:\/\/www.ucsfhealth.org\/mychart\", \"line\": 2, \"type\": \"source-location\", \"column\": 328093, \"urlProvider\": \"network\"}}, {\"signal\": \"Object.setPrototypeOf\", \"location\": {\"url\": \"https:\/\/www.ucsfhealth.org\/mychart\", \"line\": 2, \"type\": \"source-location\", \"column\": 328224, \"urlProvider\": \"network\"}}, {\"signal\": \"Object.values\", \"location\": {\"url\": \"https:\/\/www.ucsfhealth.org\/mychart\", \"line\": 2, \"type\": \"source-location\", \"column\": 328531, \"urlProvider\": \"network\"}}, {\"signal\": \"Reflect.apply\", \"location\": {\"url\": \"https:\/\/www.ucsfhealth.org\/mychart\", \"line\": 2, \"type\": \"source-location\", \"column\": 333583, \"urlProvider\": \"network\"}}, {\"signal\": \"Reflect.construct\", \"location\": {\"url\": \"https:\/\/www.ucsfhealth.org\/mychart\", \"line\": 2, \"type\": \"source-location\", \"column\": 333955, \"urlProvider\": \"network\"}}, {\"signal\": \"Reflect.defineProperty\", \"location\": {\"url\": \"https:\/\/www.ucsfhealth.org\/mychart\", \"line\": 2, \"type\": \"source-location\", \"column\": 334493, \"urlProvider\": \"network\"}}, {\"signal\": \"Reflect.deleteProperty\", \"location\": {\"url\": \"https:\/\/www.ucsfhealth.org\/mychart\", \"line\": 2, \"type\": \"source-location\", \"column\": 334758, \"urlProvider\": \"network\"}}, {\"signal\": \"Reflect.get\", \"location\": {\"url\": \"https:\/\/www.ucsfhealth.org\/mychart\", \"line\": 2, \"type\": \"source-location\", \"column\": 334945, \"urlProvider\": \"network\"}}, {\"signal\": \"Reflect.getOwnPropertyDescriptor\", \"location\": {\"url\": \"https:\/\/www.ucsfhealth.org\/mychart\", \"line\": 2, \"type\": \"source-location\", \"column\": 335202, \"urlProvider\": \"network\"}}, {\"signal\": \"Reflect.getPrototypeOf\", \"location\": {\"url\": \"https:\/\/www.ucsfhealth.org\/mychart\", \"line\": 2, \"type\": \"source-location\", \"column\": 335344, \"urlProvider\": \"network\"}}, {\"signal\": \"Reflect.has\", \"location\": {\"url\": \"https:\/\/www.ucsfhealth.org\/mychart\", \"line\": 2, \"type\": \"source-location\", \"column\": 335452, \"urlProvider\": \"network\"}}, {\"signal\": \"Reflect.isExtensible\", \"location\": {\"url\": 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\"location\": {\"url\": \"https:\/\/www.ucsfhealth.org\/mychart\", \"line\": 2, \"type\": \"source-location\", \"column\": 341042, \"urlProvider\": \"network\"}}, {\"signal\": \"String.raw\", \"location\": {\"url\": \"https:\/\/www.ucsfhealth.org\/mychart\", \"line\": 2, \"type\": \"source-location\", \"column\": 342497, \"urlProvider\": \"network\"}}, {\"signal\": \"String.prototype.repeat\", \"location\": {\"url\": \"https:\/\/www.ucsfhealth.org\/mychart\", \"line\": 2, \"type\": \"source-location\", \"column\": 342709, \"urlProvider\": \"network\"}}]}, \"totalBytes\": 0, \"wastedBytes\": 19501}, {\"url\": \"https:\/\/cdn.jsdelivr.net\/npm\/clipboard@2\/dist\/clipboard.min.js\", \"subItems\": {\"type\": \"subitems\", \"items\": [{\"signal\": \"@babel\/plugin-transform-classes\", \"location\": {\"url\": \"https:\/\/cdn.jsdelivr.net\/npm\/clipboard@2\/dist\/clipboard.min.js\", \"line\": 6, \"type\": \"source-location\", \"column\": 3853, \"urlProvider\": \"network\"}}]}, \"totalBytes\": 0, \"wastedBytes\": 59}, {\"url\": \"https:\/\/player.vimeo.com\/api\/player.js\", \"subItems\": {\"type\": \"subitems\", \"items\": [{\"signal\": \"@babel\/plugin-transform-classes\", \"location\": {\"url\": \"https:\/\/player.vimeo.com\/api\/player.js\", \"line\": 1, \"type\": \"source-location\", \"column\": 7732, \"urlProvider\": \"network\"}}]}, \"totalBytes\": 0, \"wastedBytes\": 50}, {\"url\": \"https:\/\/www.ucsfhealth.org\/assets\/ucsf\/main.js\", \"subItems\": {\"type\": \"subitems\", \"items\": [{\"signal\": \"@babel\/plugin-transform-classes\", \"location\": {\"url\": \"https:\/\/www.ucsfhealth.org\/assets\/ucsf\/main.js\", \"line\": 25, \"type\": \"source-location\", \"column\": 89208, \"urlProvider\": \"network\"}}]}, \"totalBytes\": 0, \"wastedBytes\": 46}, {\"url\": \"https:\/\/assets.adobedtm.com\/db5f13cb240b\/b1130ce1ceae\/launch-db8f55f3e131.min.js\", \"subItems\": {\"type\": \"subitems\", \"items\": [{\"signal\": \"@babel\/plugin-transform-classes\", \"location\": {\"url\": \"https:\/\/assets.adobedtm.com\/db5f13cb240b\/b1130ce1ceae\/launch-db8f55f3e131.min.js\", \"line\": 6, \"type\": \"source-location\", \"column\": 28540, \"urlProvider\": \"network\"}}]}, \"totalBytes\": 0, \"wastedBytes\": 28}]"

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.component-content > ul > li > img","div.component-content > ul > li > img"]

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.sub-nav > div > a > img"]

If the LCP element is dynamically added to the page, you should preload the image in order to improve LCP. Learn more about preloading LCP elements.

["div#header > div.component > div.component-content > div.nav-wrapper"]

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

"[{\"url\": \"http:\/\/www.ucsfhealth.org\/mychart\", \"wastedMs\": 616.1089999999999}, {\"url\": \"https:\/\/www.ucsfhealth.org\/mychart\", \"wastedMs\": 0}]"

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:\/\/www.ucsfhealth.org\/assets\/ucsf\/main.css\", \"wastedMs\": 909, \"totalBytes\": 73417}]"

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

"[{\"url\": \"http:\/\/www.ucsfhealth.org\/mychart\", \"resolution\": \"Allowed\"}]"

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.component-content > ul > li > img","div.component-content > ul > li > img"]

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

["div.component-content > ul > li > img","div.component-content > ul > li > img"]

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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