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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.

32

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
pl.tedcdn.com/fonts/InterVariable.woff20.0 ms344.6 KiB
/fss/fve7g7/b69e7dfa-6829-4033-8ec2-a82ec67eaceb/TEDGAMES...0.0 ms192.3 KiB
cdn.yourbow.com/ted/hbyb.js3600.0 s196.3 KiB
cdn.fundraiseup.com/widget/AVFWZGUV0.0 ms65.3 KiB
ak.sail-horizon.com/spm/spm.v1.min.js600.0 s48.1 KiB
b-code.liadm.com/a-091g.min.js86400.0 s47.0 KiB
cmp.osano.com/AzqTgHUHUGJa7gInt/9e4d9097-fa02-474b-9ac9-958cf3f54337/osano-ui.js86400.0 s29.1 KiB
static.cdn.prismic.io/prismic.js?new=true&repo=tedconf0.0 ms9.8 KiB
cdn.rudderlabs.com/3.21.0/modern/plugins/rsa-plugins-RetryQueue.min.js3600.0 s3.9 KiB
cdn.rudderlabs.com/3.21.0/modern/plugins/rsa-plugins-common.min.js3600.0 s3.6 KiB
vz-8bbc7bbf-a1e.b-cdn.net/44455006-1a54-4b23-bfe8-c6187b9478d5/720p/video.m3u830.0 s1.8 KiB
vz-8bbc7bbf-a1e.b-cdn.net/44455006-1a54-4b23-bfe8-c6187b9478d5/480p/video.m3u830.0 s1.8 KiB
vz-8bbc7bbf-a1e.b-cdn.net/c0618340-2751-4cb8-bcbd-3992c694dac3/480p/video.m3u830.0 s1.8 KiB
vz-8bbc7bbf-a1e.b-cdn.net/c0618340-2751-4cb8-bcbd-3992c694dac3/720p/video.m3u830.0 s1.8 KiB
vz-8bbc7bbf-a1e.b-cdn.net/42e70133-846c-4d82-b891-6715daa034dc/480p/video.m3u830.0 s1.7 KiB
vz-8bbc7bbf-a1e.b-cdn.net/42e70133-846c-4d82-b891-6715daa034dc/720p/video.m3u830.0 s1.7 KiB
vz-8bbc7bbf-a1e.b-cdn.net/bde3fe3d-fa23-4257-b5bb-c42dfa9086eb/480p/video.m3u830.0 s1.6 KiB
vz-8bbc7bbf-a1e.b-cdn.net/bde3fe3d-fa23-4257-b5bb-c42dfa9086eb/720p/video.m3u830.0 s1.6 KiB
vz-8bbc7bbf-a1e.b-cdn.net/49a16d6c-9839-438c-a814-ee646f5b515f/480p/video.m3u830.0 s1.4 KiB
vz-8bbc7bbf-a1e.b-cdn.net/7740cf90-8213-4c38-8b2f-68813d73045d/480p/video.m3u830.0 s1.4 KiB
vz-8bbc7bbf-a1e.b-cdn.net/49a16d6c-9839-438c-a814-ee646f5b515f/720p/video.m3u830.0 s1.4 KiB
vz-8bbc7bbf-a1e.b-cdn.net/d8644e4c-8639-4796-b1fa-8eacec07c26a/480p/video.m3u830.0 s1.4 KiB
vz-8bbc7bbf-a1e.b-cdn.net/d8644e4c-8639-4796-b1fa-8eacec07c26a/1080p/video.m3u830.0 s1.4 KiB
vz-8bbc7bbf-a1e.b-cdn.net/7740cf90-8213-4c38-8b2f-68813d73045d/1080p/video.m3u830.0 s1.4 KiB
vz-8bbc7bbf-a1e.b-cdn.net/a1599794-4c67-4c14-9161-d08bf188b37c/480p/video.m3u830.0 s1.4 KiB
cdn.rudderlabs.com/3.21.0/modern/plugins/rsa-plugins-remote-XhrQueue.min.js3600.0 s1.6 KiB
vz-8bbc7bbf-a1e.b-cdn.net/e921c045-0f6e-4a88-a7cc-0695fa6b5153/480p/video.m3u830.0 s1.2 KiB
vz-8bbc7bbf-a1e.b-cdn.net/e921c045-0f6e-4a88-a7cc-0695fa6b5153/1080p/video.m3u830.0 s1.2 KiB
vz-8bbc7bbf-a1e.b-cdn.net/a442ca3a-9e00-40c5-8a76-33ee6472d589/480p/video.m3u830.0 s1.1 KiB
vz-8bbc7bbf-a1e.b-cdn.net/a442ca3a-9e00-40c5-8a76-33ee6472d589/720p/video.m3u830.0 s1.1 KiB
vz-8bbc7bbf-a1e.b-cdn.net/44455006-1a54-4b23-bfe8-c6187b9478d5/playlist.m3u830.0 s1.0 KiB
vz-8bbc7bbf-a1e.b-cdn.net/bde3fe3d-fa23-4257-b5bb-c42dfa9086eb/playlist.m3u830.0 s1.0 KiB
vz-8bbc7bbf-a1e.b-cdn.net/7740cf90-8213-4c38-8b2f-68813d73045d/playlist.m3u830.0 s1.0 KiB
vz-8bbc7bbf-a1e.b-cdn.net/e921c045-0f6e-4a88-a7cc-0695fa6b5153/playlist.m3u830.0 s1.0 KiB
vz-8bbc7bbf-a1e.b-cdn.net/42e70133-846c-4d82-b891-6715daa034dc/playlist.m3u830.0 s1.0 KiB
vz-8bbc7bbf-a1e.b-cdn.net/a442ca3a-9e00-40c5-8a76-33ee6472d589/playlist.m3u830.0 s1.0 KiB
vz-8bbc7bbf-a1e.b-cdn.net/a1599794-4c67-4c14-9161-d08bf188b37c/playlist.m3u830.0 s1.0 KiB
vz-8bbc7bbf-a1e.b-cdn.net/d8644e4c-8639-4796-b1fa-8eacec07c26a/playlist.m3u830.0 s1.0 KiB
vz-8bbc7bbf-a1e.b-cdn.net/49a16d6c-9839-438c-a814-ee646f5b515f/playlist.m3u830.0 s934 B
vz-8bbc7bbf-a1e.b-cdn.net/c0618340-2751-4cb8-bcbd-3992c694dac3/playlist.m3u830.0 s933 B
cdn.rudderlabs.com/3.21.0/modern/plugins/rsa-plugins.js3600.0 s990 B
sli.ted.com/baker?dtstmp=17763621716280.0 ms536 B
/usersync/liveintent/?cb=//i.liadm.com/s/35004?bidder_id%...0.0 ms200 B
cdn.fundraiseup.com/embed-data/elements-global/AVFWZGUV.js0.0 ms174 B
match.adsrvr.org/track/cmf/generic?ttd_pid=liveintent&ttd_tpi=1&gdpr=00.0 ms149 B
vz-8bbc7bbf-a1e.b-cdn.net/a442ca3a-9e00-40c5-8a76-33ee6472d589/480p/video.m3u830.0 s0 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:Top function call valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]
items: [map[reflowTime:201.401 source:map[column:137515 line:1 type:source-location url:https://www.ted.com/_next/static/chunks/10ve7kro4jeja.js urlProvider:network]]]
headings: [map[key:source label:Source valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]
items: [map[reflowTime:137.084 source:map[type:text value:[unattributed]]] map[reflowTime:77.321 source:map[column:4871 line:0 type:source-location url:https://www.ted.com/_next/static/chunks/0ez-x3h3dxkrv.js urlProvider:network]] map[reflowTime:152.117 source:map[column:26857 line:0 type:source-location url:https://www.ted.com/_next/static/chunks/0ez-x3h3dxkrv.js urlProvider:network]] map[reflowTime:2.268 source:map[column:33340 line:0 type:source-location url:https://www.ted.com/_next/static/chunks/0ez-x3h3dxkrv.js urlProvider:network]] map[reflowTime:10.045 source:map[column:34152 line:0 type:source-location url:https://www.ted.com/_next/static/chunks/12yqivmg51ele.js urlProvider:network]] map[reflowTime:5.038 source:map[column:27358 line:0 type:source-location url:https://www.ted.com/_next/static/chunks/0ez-x3h3dxkrv.js urlProvider:network]] map[reflowTime:10.917 source:map[column:30031 line:1 type:source-location url:https://cmp.osano.com/AzqTgHUHUGJa7gInt/9e4d9097-fa02-474b-9ac9-958cf3f54337/osano-ui.js urlProvider:network]] map[reflowTime:3.43 source:map[column:62355 line:1 type:source-location url:https://cmp.osano.com/AzqTgHUHUGJa7gInt/9e4d9097-fa02-474b-9ac9-958cf3f54337/osano-ui.js urlProvider:network]] map[reflowTime:0.966 source:map[column:62714 line:1 type:source-location url:https://cmp.osano.com/AzqTgHUHUGJa7gInt/9e4d9097-fa02-474b-9ac9-958cf3f54337/osano-ui.js urlProvider:network]] map[reflowTime:3.171 source:map[column:26 line:803 type:source-location url:https://media.begenuin.com/sdk/chunks/vendor-external-O5cr870B.js urlProvider:network]] map[reflowTime:21.853 source:map[column:40 line:8184 type:source-location url:https://media.begenuin.com/sdk/chunks/vendor-animation-Cov7gVAf.js urlProvider:network]] map[reflowTime:24.662 source:map[column:86 line:8419 type:source-location url:https://media.begenuin.com/sdk/chunks/vendor-animation-Cov7gVAf.js urlProvider:network]] map[reflowTime:31.033 source:map[column:15 line:7691 type:source-location url:https://media.begenuin.com/sdk/chunks/feed-C4rzC3fy.js urlProvider:network]] map[reflowTime:9.537 source:map[column:20327 line:0 type:source-location url:https://www.ted.com/_next/static/chunks/0ez-x3h3dxkrv.js urlProvider:network]]]

Each subpart has specific improvement strategies. Ideally, most of the LCP time should be spent on loading the resources, not within delays.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:label label:Subpart valueType:text] map[key:duration label:Duration valueType:ms]]
items: [map[duration:375.338 label:Time to first byte subpart:timeToFirstByte] map[duration:1923.054 label:Resource load delay subpart:resourceLoadDelay] map[duration:94.971 label:Resource load duration subpart:resourceLoadDuration] map[duration:349.42 label:Element render delay subpart:elementRenderDelay]]
lhId: page-0-IMG
nodeLabel: Promo image
path: 1,HTML,1,BODY,1,DIV,1,DIV,1,DIV,1,MAIN,0,DIV,0,SECTION,0,SECTION,0,DIV,1,DIV,1,DIV,0,DIV,0,A,0,IMG
selector: div.swiper-slide > div.relative > a.block > img.object-cover
snippet: <img alt="Promo image" loading="eager" decoding="async" data-nimg="fill" class="object-cover object-top" sizes="(min-width: 1920px) 33vw, (min-width: 1024px) 50vw, (min-width: 768px) 66v…" srcset="https://pi.tedcdn.com/r/images.prismic.io/tedconf/ad1DqZ1ZCF7ETJlO_TEDLive…" src="https://pi.tedcdn.com/r/images.prismic.io/tedconf/ad1DqZ1ZCF7ETJlO_TEDLive…" style="position: absolute; height: 100%; width: 100%; inset: 0px;">

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-IMG
nodeLabel: Promo image
path: 1,HTML,1,BODY,1,DIV,1,DIV,1,DIV,1,MAIN,0,DIV,0,SECTION,0,SECTION,0,DIV,1,DIV,1,DIV,0,DIV,0,A,0,IMG
selector: div.swiper-slide > div.relative > a.block > img.object-cover
snippet: <img alt="Promo image" loading="eager" decoding="async" data-nimg="fill" class="object-cover object-top" sizes="(min-width: 1920px) 33vw, (min-width: 1024px) 50vw, (min-width: 768px) 66v…" srcset="https://pi.tedcdn.com/r/images.prismic.io/tedconf/ad1DqZ1ZCF7ETJlO_TEDLive…" src="https://pi.tedcdn.com/r/images.prismic.io/tedconf/ad1DqZ1ZCF7ETJlO_TEDLive…" style="position: absolute; height: 100%; width: 100%; inset: 0px;">

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
Promo image div.swiper-slide > div.relative > a.block > img.object-cover
/r/images.prismic.io/tedconf/ad1DqZ1ZCF7ETJlO_TEDLivehome...503.2 KiB417.8 KiB
div.swiper-slide > div.gencl:h-full > div.gencl:relative > video.gencl:w-auto div.swiper-slide > div.gencl:h-full > div.gencl:relative > video.gencl:w-auto
/7740cf90-8213-4c38-8b2f-68813d73045d/thumbnail_47deaab8.jpg424.3 KiB382.0 KiB
div.swiper-slide > div.gencl:h-full > div.gencl:relative > video.gencl:w-auto div.swiper-slide > div.gencl:h-full > div.gencl:relative > video.gencl:w-auto
/bde3fe3d-fa23-4257-b5bb-c42dfa9086eb/thumbnail_12373bac.jpg420.2 KiB377.9 KiB
div.swiper-slide > div.gencl:h-full > div.gencl:relative > video.gencl:w-auto div.swiper-slide > div.gencl:h-full > div.gencl:relative > video.gencl:w-auto
/d8644e4c-8639-4796-b1fa-8eacec07c26a/thumbnail_830e788d.jpg418.8 KiB376.5 KiB
div.swiper-slide > div.gencl:h-full > div.gencl:relative > video.gencl:w-auto div.swiper-slide > div.gencl:h-full > div.gencl:relative > video.gencl:w-auto
/a442ca3a-9e00-40c5-8a76-33ee6472d589/thumbnail_b0c7edff.jpg406.4 KiB364.1 KiB
div.swiper-slide > div.gencl:h-full > div.gencl:relative > video.gencl:w-auto div.swiper-slide > div.gencl:h-full > div.gencl:relative > video.gencl:w-auto
/c0618340-2751-4cb8-bcbd-3992c694dac3/thumbnail_e067781e.jpg381.2 KiB339.0 KiB
div.swiper-slide > div.gencl:h-full > div.gencl:relative > video.gencl:w-auto div.swiper-slide > div.gencl:h-full > div.gencl:relative > video.gencl:w-auto
/a1599794-4c67-4c14-9161-d08bf188b37c/thumbnail_5ab14752.jpg424.3 KiB317.4 KiB
div.swiper-slide > div.gencl:h-full > div.gencl:relative > video.gencl:w-auto div.swiper-slide > div.gencl:h-full > div.gencl:relative > video.gencl:w-auto
/44455006-1a54-4b23-bfe8-c6187b9478d5/thumbnail_d2276f67.jpg419.2 KiB312.3 KiB
div.swiper-slide > div.gencl:h-full > div.gencl:relative > video.gencl:w-auto div.swiper-slide > div.gencl:h-full > div.gencl:relative > video.gencl:w-auto
/49a16d6c-9839-438c-a814-ee646f5b515f/thumbnail_9a7724e0.jpg410.9 KiB304.0 KiB
div.swiper-slide > div.gencl:h-full > div.gencl:relative > video.gencl:w-auto div.swiper-slide > div.gencl:h-full > div.gencl:relative > video.gencl:w-auto
/e921c045-0f6e-4a88-a7cc-0695fa6b5153/thumbnail_b29f394e.jpg405.9 KiB299.0 KiB
div.swiper-slide > div.gencl:h-full > div.gencl:relative > video.gencl:w-auto div.swiper-slide > div.gencl:h-full > div.gencl:relative > video.gencl:w-auto
/42e70133-846c-4d82-b891-6715daa034dc/thumbnail_7bf13db5.jpg377.2 KiB270.3 KiB
ted_idea_search_buenos_aires_argentina a.relative > div.relative > div.aspect-h-9 > img.object-cover
/r/talkstar-assets.s3.amazonaws.com/production/talks/talk...19.5 KiB6.0 KiB

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

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

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: 1.0 s
URLTime Spent
ted.com/1.0 s
www.ted.com/0.0 ms

Diagnostics

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: 490 ms 49.8 KiB
URLTransfer SizeEst Savings
www.ted.com/_next/static/chunks/0jza3jk8q64jw.css51.1 KiB49.8 KiB

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: 910 ms 1.7 MiB
URLTransfer SizeEst Savings
static.fundraiseup.com/checkout.2fb913ca26161876.js402.5 KiB359.0 KiB
media.begenuin.com/sdk/chunks/feed-C4rzC3fy.js194.6 KiB172.2 KiB
media.begenuin.com/sdk/chunks/index-8EYXbSqT.js285.6 KiB159.7 KiB
cdn.yourbow.com/ted/hbyb.js195.8 KiB143.9 KiB
/pagead/managed/js/gpt/m202604130101/pubads_impl.js187.5 KiB130.8 KiB
media.begenuin.com/sdk/chunks/vendor-forms-BRAWdd6O.js159.5 KiB119.9 KiB
static.fundraiseup.com/checkout-sentry-vendor.dda4c7629502a974.js111.6 KiB111.6 KiB
media.begenuin.com/sdk/chunks/vendor-animation-Cov7gVAf.js130.2 KiB99.4 KiB
static.fundraiseup.com/checkout-vendors.78ab7844d94042df.js105.2 KiB87.4 KiB
www.ted.com/_next/static/chunks/0ohty3wb33a.t.js83.8 KiB62.0 KiB
media.begenuin.com/sdk/chunks/vendor-radix-pOLIplXM.js54.5 KiB48.4 KiB
www.ted.com/_next/static/chunks/0bmiy_96-93.m.js70.1 KiB45.2 KiB
www.ted.com/_next/static/chunks/0x.hrftbimb3a.js35.3 KiB35.2 KiB
www.ted.com/_next/static/chunks/092zji5u07qgk.js52.3 KiB33.2 KiB
media.begenuin.com/sdk/chunks/vendor-external-O5cr870B.js75.0 KiB26.8 KiB
media.begenuin.com/sdk/chunks/vendor-utils-CoqRx-ES.js73.9 KiB24.3 KiB
media.begenuin.com/sdk/chunks/vendor-react-query-Cdnp5BQu.js45.6 KiB24.0 KiB
static.fundraiseup.com/checkout-styles.8d2f5640734b6a7c.js22.2 KiB22.2 KiB
cdn.fundraiseup.com/widget/AVFWZGUV64.4 KiB22.0 KiB
www.ted.com/_next/static/chunks/0-1uuud_vkogc.js42.8 KiB21.8 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
Unattributable7.3 s275 ms0.0 ms
www.ted.com/_next/static/chunks/10ve7kro4jeja.js5.2 s3.3 s30 ms
www.ted.com/4.7 s77 ms11 ms
www.ted.com/_next/static/chunks/13mh4qsg0ojc3.js4.6 s300 ms13 ms
www.ted.com/_next/static/chunks/0.jna.w-3mqdg.js2.4 s1.7 s0.7 ms
cmp.osano.com/AzqTgHUHUGJa7gInt/9e4d9097-fa02-474b-9ac9-958cf3f54337/osano.js1.7 s1.5 s38 ms
www.ted.com/_next/static/chunks/0bokogfw9jzpb.js1.3 s862 ms3.5 ms
www.ted.com/_next/static/chunks/turbopack-0li4q.l8idl5g.js1.1 s1.1 s2.2 ms
media.begenuin.com/sdk/chunks/index-8EYXbSqT.js1.1 s807 ms8.2 ms
www.ted.com/_next/static/chunks/0-1uuud_vkogc.js950 ms192 ms25 ms
www.ted.com/_next/static/chunks/03ifowo1fb7pw.js941 ms418 ms6.7 ms
www.ted.com/_next/static/chunks/turbopack-0azua~rknfwv~.js814 ms770 ms2.1 ms
media.begenuin.com/sdk/chunks/vendor-external-O5cr870B.js789 ms539 ms2.1 ms
cdn.yourbow.com/ted/hbyb.js775 ms663 ms107 ms
cdn.fundraiseup.com/widget/AVFWZGUV535 ms445 ms55 ms
/pagead/managed/js/gpt/m202604130101/pubads_impl.js526 ms432 ms90 ms
www.ted.com/_next/static/chunks/0cvhe6ikgdp0s.js521 ms302 ms1.7 ms
static.fundraiseup.com/checkout-vendors.78ab7844d94042df.js492 ms440 ms51 ms
static.cdn.prismic.io/prismic.js?new=true&repo=tedconf482 ms472 ms6.9 ms
www.ted.com/_next/static/chunks/0a6fv4704bgj..js477 ms332 ms2.2 ms
b-code.liadm.com/a-091g.min.js359 ms283 ms57 ms
static.fundraiseup.com/checkout.2fb913ca26161876.js292 ms4.1 ms287 ms
securepubads.g.doubleclick.net/tag/js/gpt.js285 ms189 ms25 ms
www.ted.com/_next/static/chunks/01cs1jed1svz9.js262 ms227 ms9.3 ms
www.ted.com/_next/static/chunks/0bmiy_96-93.m.js237 ms189 ms47 ms
ak.sail-horizon.com/spm/spm.v1.min.js174 ms134 ms34 ms
www.ted.com/_next/static/chunks/0ez-x3h3dxkrv.js171 ms43 ms13 ms
www.ted.com/_next/static/chunks/0jza3jk8q64jw.css164 ms0.0 ms0.0 ms
static.fundraiseup.com/elementsApi.6ed9e57bcd3c1e31.js148 ms126 ms20 ms
cmp.osano.com/AzqTgHUHUGJa7gInt/9e4d9097-fa02-474b-9ac9-958cf3f54337/osano-ui.js147 ms66 ms19 ms
www.ted.com/_next/static/chunks/07zl3_penlz_s.js145 ms133 ms9.3 ms
www.ted.com/_next/static/chunks/0k~1425khwm0-.js120 ms114 ms1.8 ms
www.ted.com/_next/static/chunks/0hjo6tipsibej.js118 ms110 ms0.7 ms
www.ted.com/_next/static/chunks/0ix-kc_hcigst.js110 ms103 ms0.7 ms
www.ted.com/_next/static/chunks/0ohty3wb33a.t.js110 ms8.4 ms99 ms
www.ted.com/_next/static/chunks/0ho7~tksmakix.js105 ms99 ms0.8 ms
www.ted.com/_next/static/chunks/0f~to27mkl57p.js87 ms54 ms17 ms
media.begenuin.com/sdk/chunks/feed-C4rzC3fy.js87 ms7.2 ms7.1 ms
www.ted.com/_next/static/chunks/0b_a71hvct1_x.js76 ms73 ms2.2 ms
www.ted.com/_next/static/chunks/0t5s37rpo-ubb.js65 ms39 ms4.7 ms
www.ted.com/_next/static/chunks/0gn9txcop7as8.js62 ms48 ms7.0 ms
www.ted.com/_next/static/chunks/103m93trk0.3-.js60 ms50 ms0.7 ms
www.ted.com/_next/static/chunks/00a9rq1vyqi9..js60 ms5.0 ms53 ms
static.fundraiseup.com/checkout-sentry-vendor.dda4c7629502a974.js58 ms1.9 ms55 ms
www.ted.com/_next/static/chunks/11fcdtdwh7wq2.js56 ms1.3 ms54 ms
www.ted.com/_next/static/chunks/0-l5m6uj81ywf.js55 ms30 ms22 ms
www.ted.com/_next/static/chunks/14m6_ev9cp687.js55 ms50 ms0.7 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 Evaluation17.8 s
Other13.9 s
Style & Layout5.6 s
Script Parsing & Compilation1.7 s
Rendering1.6 s
Garbage Collection491 ms
Parse HTML & CSS368 ms

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 0.0 ms 327.0 KiB
URLTransfer SizeEst Savings
media.begenuin.com/sdk/chunks/index-8EYXbSqT.js285.6 KiB97.4 KiB
media.begenuin.com/sdk/chunks/feed-C4rzC3fy.js194.6 KiB68.4 KiB
media.begenuin.com/sdk/chunks/vendor-forms-BRAWdd6O.js159.6 KiB41.2 KiB
media.begenuin.com/sdk/chunks/vendor-animation-Cov7gVAf.js130.2 KiB32.3 KiB
media.begenuin.com/sdk/chunks/vendor-utils-CoqRx-ES.js73.9 KiB28.4 KiB
media.begenuin.com/sdk/chunks/vendor-external-O5cr870B.js75.0 KiB22.1 KiB
media.begenuin.com/sdk/chunks/vendor-radix-pOLIplXM.js54.5 KiB19.0 KiB
media.begenuin.com/sdk/chunks/vendor-react-query-Cdnp5BQu.js45.6 KiB13.6 KiB
media.begenuin.com/sdk/chunks/embed-YjuMENHE.js12.4 KiB4.6 KiB

Large network payloads cost users real money and are highly correlated with long load times. Learn how to reduce payload sizes.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTransfer Size
vz-8bbc7bbf-a1e.b-cdn.net/d8644e4c-8639-4796-b1fa-8eacec07c26a/1080p/video2.ts2.0 MiB
vz-8bbc7bbf-a1e.b-cdn.net/e921c045-0f6e-4a88-a7cc-0695fa6b5153/1080p/video2.ts1.8 MiB
vz-8bbc7bbf-a1e.b-cdn.net/bde3fe3d-fa23-4257-b5bb-c42dfa9086eb/720p/video2.ts900.6 KiB
vz-8bbc7bbf-a1e.b-cdn.net/c0618340-2751-4cb8-bcbd-3992c694dac3/720p/video2.ts895.4 KiB
vz-8bbc7bbf-a1e.b-cdn.net/44455006-1a54-4b23-bfe8-c6187b9478d5/720p/video2.ts760.6 KiB
vz-8bbc7bbf-a1e.b-cdn.net/d8644e4c-8639-4796-b1fa-8eacec07c26a/480p/video0.ts741.9 KiB
vz-8bbc7bbf-a1e.b-cdn.net/49a16d6c-9839-438c-a814-ee646f5b515f/720p/video2.ts735.1 KiB
vz-8bbc7bbf-a1e.b-cdn.net/e921c045-0f6e-4a88-a7cc-0695fa6b5153/480p/video1.ts726.6 KiB
vz-8bbc7bbf-a1e.b-cdn.net/a442ca3a-9e00-40c5-8a76-33ee6472d589/720p/video2.ts668.6 KiB
vz-8bbc7bbf-a1e.b-cdn.net/d8644e4c-8639-4796-b1fa-8eacec07c26a/480p/video1.ts653.9 KiB

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
●Modern HTTP
●Render blocking requests
●Optimize viewport for mobile
●Minify CSS
●User Timing marks and measures 16 user timings
●Avoid long main-thread tasks 20 long tasks found
●Avoid non-composited animations 1 animated element found
●Image elements have explicit `width` and `height`
●Page didn't prevent back/forward cache restoration
●Network Requests
●Network Round Trip Times 100 ms
●Server Backend Latencies 140 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Initial server response time was short Root document took 0 ms
●Avoid large layout shifts 2 layout shifts found
○INP breakdown
76

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.

ARIA

ARIA dialog elements without accessible names may prevent screen readers users from discerning the purpose of these elements. Learn how to make ARIA dialog elements more accessible.

Why this matters

Informational: a Permissions-Policy directive showing feature -> allowed origins.

Source: MDN Permissions-Policy

Failing Elements
A challenge for your brain Daily word, logic, and strategy games that push your… body.antialiased > section#sailthru-overlay-container

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Names and labels

When a button doesn't have an accessible name, screen readers announce it as "button", making it unusable for users who rely on screen readers. Learn how to make buttons more accessible.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div#hero-slider-images > div.cloned-standard-hero-slider-nav-prev > div.absolute > button.group div#hero-slider-images > div.cloned-standard-hero-slider-nav-prev > div.absolute > button.group
div#hero-slider-images > div.cloned-standard-hero-slider-nav-next > div.absolute > button.group div#hero-slider-images > div.cloned-standard-hero-slider-nav-next > div.absolute > button.group
div.gencl:absolute > div.gencl:absolute > div.gencl:flex > button.gencl:inline-flex div.gencl:absolute > div.gencl:absolute > div.gencl:flex > button.gencl:inline-flex
div.gencl:absolute > div.gencl:absolute > div.gencl:flex > button.gencl:inline-flex div.gencl:absolute > div.gencl:absolute > div.gencl:flex > button.gencl:inline-flex
div.gencl:absolute > div.gencl:absolute > div.gencl:flex > button.gencl:inline-flex div.gencl:absolute > div.gencl:absolute > div.gencl:flex > button.gencl:inline-flex
body.antialiased > section#sailthru-overlay-container > div.sailthru-overlay > button.sailthru-overlay-close body.antialiased > section#sailthru-overlay-container > div.sailthru-overlay > button.sailthru-overlay-close

Labels ensure that form controls are announced properly by assistive technologies, like screen readers. Learn more about form element labels.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.flex > div.mb-8 > div.relative > input.newsletter-input div.flex > div.mb-8 > div.relative > input.newsletter-input

Link text (and alternate text for images, when used as links) that is discernible, unique, and focusable improves the navigation experience for screen reader users. Learn how to make links accessible.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.mx-auto > div.flex > div.h-100 > a div.mx-auto > div.flex > div.h-100 > a
div.mx-auto > div.flex > div.h-100 > a div.mx-auto > div.flex > div.h-100 > a
div.w-full > div > div.mb-2 > a.relative div.w-full > div > div.mb-2 > a.relative
div.w-full > div > div.mb-2 > a.relative div.w-full > div > div.mb-2 > a.relative
div.w-full > div > div.mb-2 > a.relative div.w-full > div > div.mb-2 > a.relative

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Best practices

Disabling zooming is problematic for users with low vision who rely on screen magnification to properly see the contents of a web page. Learn more about the viewport meta tag.

Why this matters

Informational: a Permissions-Policy directive showing feature -> allowed origins.

Source: MDN Permissions-Policy

Failing Elements
head > meta head > meta

Touch targets with sufficient size and spacing help users who may have difficulty targeting small controls to activate the targets. Learn more about touch targets.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Storage Preferences div#befbc0e5-ee15-4e14-8ba1-c77e210294a9 > div.osano-cm-dialog__content > p.osano-cm-content__drawer-links > a.osano-cm-drawer-links__link
Third Parties div#befbc0e5-ee15-4e14-8ba1-c77e210294a9 > div.osano-cm-dialog__content > p.osano-cm-content__drawer-links > a.osano-cm-drawer-links__link
LOVE div.flex > div.flex > div.flex > a.relative
SCIENCE div.flex > div.flex > div.flex > a.relative
BUSINESS div.flex > div.flex > div.flex > a.relative
TECHNOLOGY div.flex > div.flex > div.flex > a.relative
RELATIONSHIPS div.flex > div.flex > div.flex > a.relative
RELATIONSHIPS div.flex > div.flex > div.flex > a.relative
HEALTH div.flex > div.grid > div.flex > a.relative
WAR div.flex > div.grid > div.flex > a.relative
SCIENCE div.flex > div.grid > div.flex > a.relative
TECHNOLOGY div.flex > div.grid > div.flex > a.relative
GLOBAL ISSUES div.flex > div.grid > div.flex > a.relative
TECHNOLOGY div.flex > div.grid > div.flex > a.relative

These items highlight common accessibility best practices.

○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
●Image elements have `[alt]` attributes
●ARIA attributes are used as specified for the element's role
●`[aria-hidden="true"]` elements do not contain focusable descendents
●Elements use only permitted ARIA attributes
●Background and foreground colors have a sufficient contrast ratio
●Document has a `<title>` element
●`<frame>` or `<iframe>` elements have a title
●`<html>` element has a `[lang]` attribute
●`<html>` element has a valid value for its `[lang]` attribute
●Links are distinguishable without relying on color.
●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
●Heading elements appear in a sequentially-descending order
●Document has a main landmark.
●Deprecated ARIA roles were not used
●`<video>` elements contain a `<track>` element with `[kind="captions"]`
●Identical links have the same purpose.
○`[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
○Elements with the `role=text` attribute do not have focusable descendents.
○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
○`<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.
○Skip links are focusable.
○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
○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.
○Elements with visible text labels have matching accessible names.
○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.
96

Best Practices

General

Errors logged to the console indicate unresolved problems. They can come from network request failures and other browser concerns. Learn more about this errors in console diagnostic audit

Why this matters

Performance issues directly impact user engagement and conversion rates.

SourceDescription
www.ted.com/_next/static/chunks/0bokogfw9jzpb.js
[CMP Monitor] Osano failure: timeout Osano did not initialize within 2000ms
●Uses HTTPS
●Avoids deprecated APIs
●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 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
●Page has valid source maps
○Redirects HTTP traffic to HTTPS
○Mitigate clickjacking with XFO or CSP
100

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.

○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
●Links are crawlable
●robots.txt is valid
●Image elements have `[alt]` attributes
●Document has a valid `hreflang`
●Document has a valid `rel=canonical`

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