Performance Report for https://www.businessinsider.com/science

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.

["a.tout-image-link > div.tout-play-icon-wrapper > svg.svg-icon > title","nav.component > ul.simplified-hamburger-menu > li > ul"]

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.

"[]"

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.businessinsider.com\/science\", \"responseTime\": 498.128}]"

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

"[{\"type\": \"table\", \"items\": [{\"node\": {\"lhId\": \"page-0-IMG\", \"path\": \"1,HTML,1,BODY,6,SECTION,1,SECTION,1,SECTION,0,DIV,0,SECTION,0,DIV,1,A,0,DIV,0,IMG\", \"type\": \"node\", \"snippet\": \"<img src=\\\"https:\/\/i.insider.com\/66145f253f923f7dab05b8ed?width=1000&amp;format=jpeg&amp;auto\u2026\\\" srcset=\\\"https:\/\/i.insider.com\/66145f253f923f7dab05b8ed?width=400&amp;format=jpeg&amp;auto=\u2026\\\" sizes=\\\"(min-width: 1280px) 900px\\\" alt=\\\"On the right, the green Devil comet streaks through a starry sky with a br\u2026\\\" decoding=\\\"async\\\">\", \"selector\": \"div.top-vertical-trio-item > a.three-column-tout-image > div.aspect-ratio > img\", \"nodeLabel\": \"On the right, the green Devil comet streaks through a starry sky with a bright \u2026\", \"boundingRect\": {\"top\": 288, \"left\": 15, \"right\": 770, \"width\": 755, \"bottom\": 666, \"height\": 378}}}], \"headings\": [{\"key\": \"node\", \"label\": \"Element\", \"valueType\": \"node\"}]}, {\"type\": \"table\", \"items\": [{\"phase\": \"TTFB\", \"timing\": 671.0260000000001, \"percent\": \"20%\"}, {\"phase\": \"Load Delay\", \"timing\": 362.92357518031895, \"percent\": \"11%\"}, {\"phase\": \"Load Time\", \"timing\": 1033.785774169197, \"percent\": \"30%\"}, {\"phase\": \"Render Delay\", \"timing\": 1339.0076506504845, \"percent\": \"39%\"}], \"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

"[{\"url\": \"https:\/\/s.yimg.com\/wi\/ytc.js\", \"subItems\": {\"type\": \"subitems\", \"items\": [{\"signal\": \"Array.from\", \"location\": {\"url\": \"https:\/\/s.yimg.com\/wi\/ytc.js\", \"line\": 0, \"type\": \"source-location\", \"column\": 2145, \"urlProvider\": \"network\"}}]}, \"totalBytes\": 0, \"wastedBytes\": 11376}, {\"url\": \"https:\/\/static.criteo.net\/js\/ld\/publishertag.prebid.144.js\", \"subItems\": {\"type\": \"subitems\", \"items\": [{\"signal\": \"Array.isArray\", \"location\": {\"url\": \"https:\/\/static.criteo.net\/js\/ld\/publishertag.prebid.144.js\", \"line\": 1, \"type\": \"source-location\", \"column\": 74871, \"urlProvider\": \"network\"}}, {\"signal\": \"Array.prototype.filter\", \"location\": {\"url\": \"https:\/\/static.criteo.net\/js\/ld\/publishertag.prebid.144.js\", \"line\": 1, \"type\": \"source-location\", \"column\": 75344, \"urlProvider\": \"network\"}}]}, \"totalBytes\": 0, \"wastedBytes\": 10024}, {\"url\": \"https:\/\/c.amazon-adsystem.com\/aax2\/apstag.js\", \"subItems\": {\"type\": \"subitems\", \"items\": [{\"signal\": \"@babel\/plugin-transform-classes\", \"location\": {\"url\": \"https:\/\/c.amazon-adsystem.com\/aax2\/apstag.js\", \"line\": 3, \"type\": \"source-location\", \"column\": 22025, \"urlProvider\": \"network\"}}]}, \"totalBytes\": 0, \"wastedBytes\": 117}, {\"url\": \"https:\/\/snap.licdn.com\/li.lms-analytics\/insight.min.js\", \"subItems\": {\"type\": \"subitems\", \"items\": [{\"signal\": \"@babel\/plugin-transform-classes\", \"location\": {\"url\": \"https:\/\/snap.licdn.com\/li.lms-analytics\/insight.min.js\", \"line\": 0, \"type\": \"source-location\", \"column\": 680, \"urlProvider\": \"network\"}}]}, \"totalBytes\": 0, \"wastedBytes\": 58}, {\"url\": \"https:\/\/micro.rubiconproject.com\/prebid\/dynamic\/10306.js\", \"subItems\": {\"type\": \"subitems\", \"items\": [{\"signal\": \"@babel\/plugin-transform-classes\", \"location\": {\"url\": \"https:\/\/micro.rubiconproject.com\/prebid\/dynamic\/10306.js\", \"line\": 8, \"type\": \"source-location\", \"column\": 4680, \"urlProvider\": \"network\"}}]}, \"totalBytes\": 0, \"wastedBytes\": 47}]"

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\": 3732.214799999986, \"groupLabel\": \"Script Evaluation\"}, {\"group\": \"other\", \"duration\": 693.6495000000082, \"groupLabel\": \"Other\"}, {\"group\": \"styleLayout\", \"duration\": 353.55539999999985, \"groupLabel\": \"Style & Layout\"}, {\"group\": \"scriptParseCompile\", \"duration\": 120.7335, \"groupLabel\": \"Script Parsing & Compilation\"}, {\"group\": \"garbageCollection\", \"duration\": 82.23119999999989, \"groupLabel\": \"Garbage Collection\"}, {\"group\": \"parseHTML\", \"duration\": 50.46689999999989, \"groupLabel\": \"Parse HTML & CSS\"}, {\"group\": \"paintCompositeRender\", \"duration\": 18.71670000000002, \"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.

[]

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.

[]

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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