Singapore · Singapore Completed: Apr 21, 2026 18:44 UTCMobile 375 × 812
Desktop 1440 × 900
Score: 76 / 100
Based on 8 categories, 0 sections
Decent speed, but optimizing further could improve engagement.
Several missing protections leave your users and data exposed.
Mostly accessible, but some users still face barriers.
Well-optimized for search — your content is discoverable.
Good server performance with room for optimization.
Mostly compliant — a few items need attention.
Rich content metadata — your pages look great everywhere.
Heavier than average — reducing page weight saves energy and bandwidth.
The overall score is a weighted average of individual category scores. Categories with more impact on user experience and security carry more weight.
Weights reflect general web best practices. Individual needs may differ.
Content-Security-Policy header is missing
Security gaps expose your site and users to attacks, eroding trust.
HSTS header is missing
Security gaps expose your site and users to attacks, eroding trust.
No Content-Security-Policy header found
Security gaps expose your site and users to attacks, eroding trust.
1 link(s) with no accessible text
Accessibility issues exclude users with disabilities — up to 15% of your potential audience.
5 image-only link(s) without alt text
Accessibility issues exclude users with disabilities — up to 15% of your potential audience.
High impact, low effort — start here.
High impact, requires investment.
Small gains, minimal effort.
Nothing in this quadrant — good news.
Low impact, high effort — do last.
Nothing in this quadrant — good news.
[](https://beavercheck.com/results/c591fd30-72c1-45ee-8cbb-e8c4bd13b331)<a href="https://beavercheck.com/results/c591fd30-72c1-45ee-8cbb-e8c4bd13b331"><img src="https://beavercheck.com/badge?url=https%3A%2F%2Fpbs.org" alt="BeaverCheck Score"></a>https://beavercheck.com/badge?url=https%3A%2F%2Fpbs.orgThis badge auto-updates with your latest scan result.
Your site performs reasonably well, but a few targeted fixes could meaningfully improve results. Addressing the critical issues below would have the most immediate impact on your user trust.
5 barrier(s) likely increasing bounce by ~28%.
Page takes 13.0s to load
+12% bounceUsers abandon at ~3s — you're 10.5s over the 2.5s threshold
Fix: Optimize render-blocking resources, preload the hero image, and compress images
Page feels frozen for 2.1s
+5% bounceClicks on the primary CTA are ignored while JavaScript runs
Fix: Break up long tasks; defer non-critical JavaScript to post-hydration
No HSTS header
+1% bounceReturning visitors are briefly exposed to downgrade attacks on first request
Fix: Set Strict-Transport-Security: max-age=31536000; includeSubDomains
No Content-Security-Policy header
+1% bounceHigher XSS blast radius — one compromised script can exfiltrate the checkout form
Fix: Ship a reporting-only CSP first, then enforce once violations are clean
Severe layout shift during page load
+6% bounceUsers mis-click when content jumps — converting intent into frustration
Fix: Reserve space for images, ads, and embeds with explicit width/height
Preliminary CRO audit — each barrier links to the tab with detailed analysis.
€383 investment → €1,732/month returns + EUR 120,500,000 risk avoided
€383
4h · 5 findings
€1,732 /mo
~€20,785 / year
EUR 120,500,000
if kept compliant
€128 — in quick wins — start here for the fastest payback
Figures combine localized regulatory fine ceilings, search/conversion value priced against local CPC, and bandwidth waste estimates. Results depend on implementation quality and audience composition. Not legal or financial advice.
4.5 developer hours at €85/hr
Based on European Union rates (€85/hr)
Start here for the best return on investment
€10,041,667 / month at risk
~€120,500,007 / year if left unfixed
€120,500,000
+5 more
€0.56 /mo
7570.8 MB/mo × 0.074 EUR/GB
Compliance figures represent the statutory maximum fine for the most severe triggered category, capped per regulation — not the sum of per-finding penalties. Based on published regulatory fine ranges. This is not legal advice.
Unique monthly visitors from your analytics
Purchases, signups, or key actions
Optional — for revenue estimation
more engaged visitors from reduced bounce
Fix 5 critical issues to capture this value
Based on Google/Deloitte research ("Milliseconds Make Millions") showing a ~7% bounce rate increase per additional second of LCP above the 2.5s "Good" threshold.
Your site's LCP: → estimated after fixes.
These are estimates based on industry research — actual results vary
Your data stays in your browser — nothing is sent to our servers
Thanks for your feedback!
We'll use a cached audit if available, or offer to scan.
Industry-standard audits powered by Google Lighthouse.
Key metrics that affect user experience.
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
5.87 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
13.01 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
2.11 s
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
1.023
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
8.10 s
Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.
16.53 s
Audit breakdown by category with detailed findings.
Remove large, duplicate JavaScript modules from bundles to reduce unnecessary bytes consumed by network activity.
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
Shipping ES5 transpiled code to modern browsers wastes bytes — every user with an evergreen browser pays for compatibility you don't need.
Most users today run browsers that natively support ES6+, async/await, optional chaining, and the rest of modern JavaScript. Transpiling to ES5 'just in case' adds 20-40% to your bundle for no benefit. Configure your build to target a modern browserslist, or ship a differential bundle pair (modern + legacy) with the module/nomodule pattern.
Source: Google web.dev / Lighthouse
3rd party code can significantly impact load performance. Reduce and defer loading of 3rd party code to prioritize your page's content.
Performance issues directly impact user engagement and conversion rates.
Layout shifts occur when elements move absent any user interaction. Investigate the causes of layout shifts, such as elements being added, removed, or their fonts changing as the page loads.
Performance issues directly impact user engagement and conversion rates.
Your first network request is the most important. Reduce its latency by avoiding redirects, ensuring a fast server response, and enabling text compression.
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.
Performance issues directly impact user engagement and conversion rates.
Reducing the download time of images can improve the perceived load time of the page and LCP. Learn more about optimizing image size
Performance issues directly impact user engagement and conversion rates.
| URL | Resource Size | Est Savings | |
|---|---|---|---|
body > div#google_image_div > a#aw0 > img.img_ad body > div#google_image_div > a#aw0 > img.img_ad | tpc.googlesyndication.com/simgad/17305951147302659319 | 27.5 KiB | 24.8 KiB |
The Black Church ul#splide05-list > li#splide05-slide01 > a.ShowPoster-module-scss-module__nhmUXq__show_poster__link > img | /contentchannels/qkJ22cN-show-poster2x3-IR4c3y5.jpg?forma... | 36.3 KiB | 21.1 KiB |
Hemingway ul#splide05-list > li#splide05-slide04 > a.ShowPoster-module-scss-module__nhmUXq__show_poster__link > img | /contentchannels/n8LSv1u-show-poster2x3-TdXlueR.jpg?forma... | 28.9 KiB | 13.7 KiB |
Battles of the American Revolution li#splide03-slide01 > div.FeaturedNewsThumbnail-module-scss-module__NgWMRG__featured_news_thumbnail_wrapper > a > img.FeaturedNewsThumbnail-module-scss-module__NgWMRG__featured_news_thumbnail_image | image.pbs.org/curate/battle-map-thumbnail-o04j7h.jpg?format=avif&resize=250x141 | 15.9 KiB | 10.2 KiB |
Subcultured ul#splide05-list > li#splide05-slide03 > a.ShowPoster-module-scss-module__nhmUXq__show_poster__link > img | /contentchannels/s1lO48Z-show-poster2x3-V6gBIDl.png?forma... | 23.7 KiB | 8.6 KiB |
Happiness: Everything You Need to Know li#splide03-slide02 > div.FeaturedNewsThumbnail-module-scss-module__NgWMRG__featured_news_thumbnail_wrapper > a > img.FeaturedNewsThumbnail-module-scss-module__NgWMRG__featured_news_thumbnail_image | image.pbs.org/curate/happiness-f9xoay.jpg?format=avif&resize=250x141 | 13.6 KiB | 7.9 KiB |
Hungary’s Magyar Wants To Take Over As Prime Minister May 5 li#splide02-slide03 > div.LatestNewsThumbnail-module-scss-module__Xdv-3q__latest_news_thumbnail_wrapper > a.LatestNewsThumbnail-module-scss-module__Xdv-3q__latest_news_thumbnail > img.LatestNewsThumbnail-module-scss-module__Xdv-3q__latest_news_thumbnail_image | image.pbs.org/curate/hungary-v4e5wz.jpg?format=avif&crop=390x220 | 21.0 KiB | 7.0 KiB |
Muhammad Ali ul#splide04-list > li#splide04-slide03 > a.ShowPoster-module-scss-module__nhmUXq__show_poster__link > img | /contentchannels/ObiHToF-show-poster2x3-BN5GGgv.jpg?forma... | 21.4 KiB | 6.3 KiB |
The U.S. and the Holocaust ul#splide04-list > li#splide04-slide02 > a.ShowPoster-module-scss-module__nhmUXq__show_poster__link > img | /contentchannels/CfrrjS4-show-poster2x3-d9mwxtG.jpg?forma... | 20.6 KiB | 5.4 KiB |
What To Know About Trump’s Tax Breaks for Tips and Overtime li#splide02-slide01 > div.LatestNewsThumbnail-module-scss-module__Xdv-3q__latest_news_thumbnail_wrapper > a.LatestNewsThumbnail-module-scss-module__Xdv-3q__latest_news_thumbnail > img.LatestNewsThumbnail-module-scss-module__Xdv-3q__latest_news_thumbnail_image | image.pbs.org/curate/taxes-ooyv9x.jpg?format=avif&crop=390x220 | 19.2 KiB | 5.2 KiB |
div.PageTransition-module-scss-module__3E4t1q__page_transition > div.Newsletter-module-scss-module__quCLyG__newsletter > picture.Newsletter-module-scss-module__quCLyG__background > img div.PageTransition-module-scss-module__3E4t1q__page_transition > div.Newsletter-module-scss-module__quCLyG__newsletter > picture.Newsletter-module-scss-module__quCLyG__background > img | www.pbs.org/images/newsletter/general/newsletter-signup-background_375@2x.avif | 42.4 KiB | 4.7 KiB |
What is Art in the Twenty-First Century? li#splide03-slide03 > div.FeaturedNewsThumbnail-module-scss-module__NgWMRG__featured_news_thumbnail_wrapper > a > img.FeaturedNewsThumbnail-module-scss-module__NgWMRG__featured_news_thumbnail_image | image.pbs.org/curate/art21-gyk7cq.jpg?format=avif&resize=250x141 | 10.3 KiB | 4.6 KiB |
Each subpart has specific improvement strategies. Ideally, most of the LCP time should be spent on loading the resources, not within delays.
Performance issues directly impact user engagement and conversion rates.
Optimize LCP by making the LCP image discoverable from the HTML immediately, and avoiding lazy-loading
Performance issues directly impact user engagement and conversion rates.
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.
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.
Performance issues directly impact user engagement and conversion rates.
| Request | Cache TTL | Transfer Size |
|---|---|---|
| cdn.ketchjs.com/ketchtag/stable/v2.12/ketch-sdk.js | 1200.0 s | 257.5 KiB |
| /pagead/managed/js/activeview/current/ufs_web_display.js | 3600.0 s | 73.1 KiB |
| global.ketchcdn.com/web/v3/config/pbs/website_smart_tag/boot.js | 1200.0 s | 4.7 KiB |
| /pagead/js/r20260420/r20110914/client/window_focus_fy2021.js | 1209600.0 s | 1.6 KiB |
These insights are also available in the Chrome DevTools Performance Panel - record a trace to view more detailed information.
Redirects introduce additional delays before the page can be loaded. Learn how to avoid page redirects.
Performance issues directly impact user engagement and conversion rates.
| URL | Time Spent |
|---|---|
| pbs.org/ | 1.5 s |
| www.pbs.org/ | 0.0 ms |
These are the largest layout shifts observed on the page. Each table item represents a single layout shift, and shows the element that shifted the most. Below each item are possible root causes that led to the layout shift. Some of these layout shifts may not be included in the CLS metric value due to windowing. Learn how to improve CLS
Performance issues directly impact user engagement and conversion rates.
| Element | Layout shift score |
|---|---|
body body | 1.000 |
Continue Watching
Dive back in right where you left off.
Sign In to Access body > main#maincontent > div.PageTransition-module-scss-module__3E4t1q__page_transition > div.SignedOutContinueWatching-module-scss-module__QM48qa__signed_out_continue_watching | 0.023 |
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.
Performance issues directly impact user engagement and conversion rates.
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.
Performance issues directly impact user engagement and conversion rates.
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.
Performance issues directly impact user engagement and conversion rates.
| URL | Transfer Size | Est Savings |
|---|---|---|
| 22.1 KiB | 22.1 KiB | |
| www.pbs.org/_next/static/chunks/0hl59ti7b81wd.css | 12.5 KiB | 12.4 KiB |
| www.pbs.org/_next/static/chunks/0f3_~aw_l8mhy.css | 13.2 KiB | 11.8 KiB |
| www.pbs.org/_next/static/chunks/0brysxoqq8n3i.css | 12.3 KiB | 11.5 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.
Multi-megabyte JavaScript bundles delay every interactive feature on the page.
This is the Lighthouse audit fired when too much JS is shipped relative to what executes. The fix isn't a config flag — it requires bundle analysis (webpack-bundle-analyzer, rollup-plugin-visualizer), splitting routes into chunks, lazy-loading off-screen components, and removing unused dependencies. Fundamentally different from minification: minifying reduces byte count, this reduces what's downloaded at all.
Source: Google web.dev / Lighthouse
| URL | Transfer Size | Est Savings |
|---|---|---|
| cdn.ketchjs.com/ketchtag/stable/v2.12/ketch-sdk.js | 257.0 KiB | 155.6 KiB |
| /pagead/managed/js/gpt/m202604090101/pubads_impl.js?cb=31... | 185.9 KiB | 96.2 KiB |
| www.googletagmanager.com/gtag/js?id=G-QCNNW9XL0J&l=GTMDataLayer&cx=c>m=4e64h1 | 171.2 KiB | 66.8 KiB |
| www.googletagmanager.com/gtm.js?id=GTM-TWTDGH&l=GTMDataLayer | 152.2 KiB | 55.5 KiB |
| /pagead/managed/js/activeview/current/ufs_web_display.js | 73.1 KiB | 30.3 KiB |
| www.pbs.org/_next/static/chunks/0s2nm2ovzd~eb.js | 70.2 KiB | 24.4 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.
Performance issues directly impact user engagement and conversion rates.
| URL | Total CPU Time | Script Evaluation | Script Parse |
|---|---|---|---|
| www.pbs.org/_next/static/chunks/0s2nm2ovzd~eb.js | 2.1 s | 1.4 s | 33 ms |
| Unattributable | 1.1 s | 124 ms | 0.0 ms |
| /pagead/managed/js/gpt/m202604090101/pubads_impl.js?cb=31... | 800 ms | 517 ms | 108 ms |
| www.pbs.org/ | 733 ms | 37 ms | 29 ms |
| cdn.ketchjs.com/ketchtag/stable/v2.12/ketch-sdk.js | 653 ms | 437 ms | 213 ms |
| www.googletagmanager.com/gtm.js?id=GTM-TWTDGH&l=GTMDataLayer | 426 ms | 316 ms | 78 ms |
| www.googletagmanager.com/gtag/js?id=G-QCNNW9XL0J&l=GTMDataLayer&cx=c>m=4e64h1 | 384 ms | 309 ms | 69 ms |
| www.pbs.org/_next/static/chunks/01-omjevdmk4c.js | 352 ms | 303 ms | 20 ms |
| /pagead/managed/js/activeview/current/ufs_web_display.js | 339 ms | 298 ms | 32 ms |
| www.pbs.org/_next/static/chunks/161x_6-equb._.js | 141 ms | 19 ms | 11 ms |
| securepubads.g.doubleclick.net/tag/js/gpt.js | 125 ms | 109 ms | 15 ms |
| ep2.adtrafficquality.google/sodar/sodar2.js | 58 ms | 51 ms | 3.1 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
Performance issues directly impact user engagement and conversion rates.
| Category | Time Spent |
|---|---|
| Script Evaluation | 4.0 s |
| Other | 1.2 s |
| Style & Layout | 1.2 s |
| Script Parsing & Compilation | 689 ms |
| Parse HTML & CSS | 140 ms |
| Rendering | 130 ms |
| Garbage Collection | 109 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
Performance issues directly impact user engagement and conversion rates.
| Failure reason | Failure type |
|---|---|
| Pages with cache-control:no-store header cannot enter back/forward cache. | Actionable |
| Pages whose main resource has cache-control:no-store cannot enter back/forward cache. | Not actionable |
| Back/forward cache is disabled because some JavaScript network request received resource with Cache-Control: no-store header. | Not actionable |
More information about the performance of your application. These numbers don't directly affect the Performance score.
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.
Deprecated APIs will eventually be removed from the browser. Learn more about deprecated APIs.
Performance issues directly impact user engagement and conversion rates.
| Deprecation / Warning | Source |
|---|---|
| SharedStorage | /pagead/managed/js/activeview/current/ufs_web_display.js line 252, col 234 |
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
Performance issues directly impact user engagement and conversion rates.
| Source | Description |
|---|---|
/pagead/managed/js/gpt/m202604090101/pubads_impl.js?cb=31... line 18, col 380265 | Loading the script 'https://ads.pubmatic.com/AdServer/js/google-esp.js' violates the following Content Security Policy directive: "script-src 'self' 'unsafe-eval' 'unsafe-inline' *.pbs.org *.googlesyndication.com *.adtrafficquality.google adservice.google.com adservice.google.co.in connect.facebook.net fundingchoicesmessages.google.com *.2mdn.net *.nr-data.net sb.scorecardresearch.com securepubads.g.doubleclick.net www.google-analytics.com analytics.google.com www.googletagmanager.com *.googletagservices.com 'unsafe-inline' 'unsafe-eval' *.cookielaw.org www.redditstatic.com alb.reddit.com analytics.tiktok.com s.pinimg.com *.ketchcdn.com *.ketchjs.com static.cloudflareinsights.com". Note that 'script-src-elem' was not explicitly set, so 'script-src' is used as a fallback. The action has been blocked. |
/pagead/managed/js/gpt/m202604090101/pubads_impl.js?cb=31... line 18, col 380265 | Loading the script 'https://connectid.analytics.yahoo.com/connectId-gpt.js' violates the following Content Security Policy directive: "script-src 'self' 'unsafe-eval' 'unsafe-inline' *.pbs.org *.googlesyndication.com *.adtrafficquality.google adservice.google.com adservice.google.co.in connect.facebook.net fundingchoicesmessages.google.com *.2mdn.net *.nr-data.net sb.scorecardresearch.com securepubads.g.doubleclick.net www.google-analytics.com analytics.google.com www.googletagmanager.com *.googletagservices.com 'unsafe-inline' 'unsafe-eval' *.cookielaw.org www.redditstatic.com alb.reddit.com analytics.tiktok.com s.pinimg.com *.ketchcdn.com *.ketchjs.com static.cloudflareinsights.com". Note that 'script-src-elem' was not explicitly set, so 'script-src' is used as a fallback. The action has been blocked. |
/pagead/managed/js/gpt/m202604090101/pubads_impl.js?cb=31... line 18, col 380265 | Loading the script 'https://invstatic101.creativecdn.com/encrypted-signals/encrypted-tag-g.js' violates the following Content Security Policy directive: "script-src 'self' 'unsafe-eval' 'unsafe-inline' *.pbs.org *.googlesyndication.com *.adtrafficquality.google adservice.google.com adservice.google.co.in connect.facebook.net fundingchoicesmessages.google.com *.2mdn.net *.nr-data.net sb.scorecardresearch.com securepubads.g.doubleclick.net www.google-analytics.com analytics.google.com www.googletagmanager.com *.googletagservices.com 'unsafe-inline' 'unsafe-eval' *.cookielaw.org www.redditstatic.com alb.reddit.com analytics.tiktok.com s.pinimg.com *.ketchcdn.com *.ketchjs.com static.cloudflareinsights.com". Note that 'script-src-elem' was not explicitly set, so 'script-src' is used as a fallback. The action has been blocked. |
/pagead/managed/js/gpt/m202604090101/pubads_impl.js?cb=31... line 18, col 380265 | Loading the script 'https://static.criteo.net/js/ld/publishertag.ids.js' violates the following Content Security Policy directive: "script-src 'self' 'unsafe-eval' 'unsafe-inline' *.pbs.org *.googlesyndication.com *.adtrafficquality.google adservice.google.com adservice.google.co.in connect.facebook.net fundingchoicesmessages.google.com *.2mdn.net *.nr-data.net sb.scorecardresearch.com securepubads.g.doubleclick.net www.google-analytics.com analytics.google.com www.googletagmanager.com *.googletagservices.com 'unsafe-inline' 'unsafe-eval' *.cookielaw.org www.redditstatic.com alb.reddit.com analytics.tiktok.com s.pinimg.com *.ketchcdn.com *.ketchjs.com static.cloudflareinsights.com". Note that 'script-src-elem' was not explicitly set, so 'script-src' is used as a fallback. The action has been blocked. |
Issues logged to the `Issues` panel in Chrome Devtools indicate unresolved problems. They can come from network request failures, insufficient security controls, and other browser concerns. Open up the Issues panel in Chrome DevTools for more details on each issue.
Performance issues directly impact user engagement and conversion rates.
| Issue type |
|---|
| Content security policy |
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.
Industry-standard audits powered by Google Lighthouse. — Desktop
Key metrics that affect user experience. — Desktop
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
2.86 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
4.60 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
255 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
1.544
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
3.59 s
Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.
5.56 s
Audit breakdown by category with detailed findings.
Remove large, duplicate JavaScript modules from bundles to reduce unnecessary bytes consumed by network activity.
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
Shipping ES5 transpiled code to modern browsers wastes bytes — every user with an evergreen browser pays for compatibility you don't need.
Most users today run browsers that natively support ES6+, async/await, optional chaining, and the rest of modern JavaScript. Transpiling to ES5 'just in case' adds 20-40% to your bundle for no benefit. Configure your build to target a modern browserslist, or ship a differential bundle pair (modern + legacy) with the module/nomodule pattern.
Source: Google web.dev / Lighthouse
3rd party code can significantly impact load performance. Reduce and defer loading of 3rd party code to prioritize your page's content.
Performance issues directly impact user engagement and conversion rates.
Layout shifts occur when elements move absent any user interaction. Investigate the causes of layout shifts, such as elements being added, removed, or their fonts changing as the page loads.
Performance issues directly impact user engagement and conversion rates.
Your first network request is the most important. Reduce its latency by avoiding redirects, ensuring a fast server response, and enabling text compression.
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.
Performance issues directly impact user engagement and conversion rates.
Reducing the download time of images can improve the perceived load time of the page and LCP. Learn more about optimizing image size
Performance issues directly impact user engagement and conversion rates.
| URL | Resource Size | Est Savings | |
|---|---|---|---|
The Black Church ul#splide05-list > li#splide05-slide01 > a.ShowPoster-module-scss-module__nhmUXq__show_poster__link > img | /contentchannels/qkJ22cN-show-poster2x3-IR4c3y5.jpg?forma... | 36.3 KiB | 27.1 KiB |
Hemingway ul#splide05-list > li#splide05-slide04 > a.ShowPoster-module-scss-module__nhmUXq__show_poster__link > img | /contentchannels/n8LSv1u-show-poster2x3-TdXlueR.jpg?forma... | 28.9 KiB | 13.7 KiB |
Battles of the American Revolution li#splide03-slide01 > div.FeaturedNewsThumbnail-module-scss-module__NgWMRG__featured_news_thumbnail_wrapper > a > img.FeaturedNewsThumbnail-module-scss-module__NgWMRG__featured_news_thumbnail_image | image.pbs.org/curate/battle-map-thumbnail-o04j7h.jpg?format=avif&resize=250x141 | 15.9 KiB | 10.2 KiB |
Subcultured ul#splide05-list > li#splide05-slide03 > a.ShowPoster-module-scss-module__nhmUXq__show_poster__link > img | /contentchannels/s1lO48Z-show-poster2x3-V6gBIDl.png?forma... | 23.7 KiB | 8.6 KiB |
Happiness: Everything You Need to Know li#splide03-slide02 > div.FeaturedNewsThumbnail-module-scss-module__NgWMRG__featured_news_thumbnail_wrapper > a > img.FeaturedNewsThumbnail-module-scss-module__NgWMRG__featured_news_thumbnail_image | image.pbs.org/curate/happiness-f9xoay.jpg?format=avif&resize=250x141 | 13.6 KiB | 7.9 KiB |
The Bigger Picture ul#splide05-list > li#splide05-slide05 > a.ShowPoster-module-scss-module__nhmUXq__show_poster__link > img | /contentchannels/Sic0NKu-show-poster2x3-IFnMMPq.jpg?forma... | 22.2 KiB | 7.0 KiB |
Austin City Limits ul#splide06-list > li#splide06-slide06 > a.ShowPoster-module-scss-module__nhmUXq__show_poster__link > img | /contentchannels/8/wAVrVuEMRuOkdvCt9BWVg.jpg?format=avif&... | 22.1 KiB | 7.0 KiB |
Muhammad Ali ul#splide04-list > li#splide04-slide03 > a.ShowPoster-module-scss-module__nhmUXq__show_poster__link > img | /contentchannels/ObiHToF-show-poster2x3-BN5GGgv.jpg?forma... | 21.4 KiB | 6.3 KiB |
The U.S. and the Holocaust ul#splide04-list > li#splide04-slide02 > a.ShowPoster-module-scss-module__nhmUXq__show_poster__link > img | /contentchannels/CfrrjS4-show-poster2x3-d9mwxtG.jpg?forma... | 20.6 KiB | 5.4 KiB |
What is Art in the Twenty-First Century? li#splide03-slide03 > div.FeaturedNewsThumbnail-module-scss-module__NgWMRG__featured_news_thumbnail_wrapper > a > img.FeaturedNewsThumbnail-module-scss-module__NgWMRG__featured_news_thumbnail_image | image.pbs.org/curate/art21-gyk7cq.jpg?format=avif&resize=250x141 | 10.3 KiB | 4.6 KiB |
Each subpart has specific improvement strategies. Ideally, most of the LCP time should be spent on loading the resources, not within delays.
Performance issues directly impact user engagement and conversion rates.
Optimize LCP by making the LCP image discoverable from the HTML immediately, and avoiding lazy-loading
Performance issues directly impact user engagement and conversion rates.
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.
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.
Performance issues directly impact user engagement and conversion rates.
| Request | Cache TTL | Transfer Size |
|---|---|---|
| cdn.ketchjs.com/ketchtag/stable/v2.12/ketch-sdk.js | 1200.0 s | 257.5 KiB |
| global.ketchcdn.com/web/v3/config/pbs/website_smart_tag/boot.js | 1200.0 s | 4.7 KiB |
These insights are also available in the Chrome DevTools Performance Panel - record a trace to view more detailed information.
Redirects introduce additional delays before the page can be loaded. Learn how to avoid page redirects.
Performance issues directly impact user engagement and conversion rates.
| URL | Time Spent |
|---|---|
| pbs.org/ | 967 ms |
| www.pbs.org/ | 0.0 ms |
These are the largest layout shifts observed on the page. Each table item represents a single layout shift, and shows the element that shifted the most. Below each item are possible root causes that led to the layout shift. Some of these layout shifts may not be included in the CLS metric value due to windowing. Learn how to improve CLS
Performance issues directly impact user engagement and conversion rates.
| Element | Layout shift score |
|---|---|
body body | 1.000 |
PBS
Featured Shows
Continue Watching
Dive back in right where you left off.
S… body > main#maincontent > div.PageTransition-module-scss-module__3E4t1q__page_transition | 0.519 |
Continue Watching
Dive back in right where you left off.
Sign In to Access body > main#maincontent > div.PageTransition-module-scss-module__3E4t1q__page_transition > div.SignedOutContinueWatching-module-scss-module__QM48qa__signed_out_continue_watching | 0.024 |
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.
Performance issues directly impact user engagement and conversion rates.
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.
Performance issues directly impact user engagement and conversion rates.
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.
Performance issues directly impact user engagement and conversion rates.
| URL | Transfer Size | Est Savings |
|---|---|---|
| 22.1 KiB | 22.1 KiB | |
| www.pbs.org/_next/static/chunks/0hl59ti7b81wd.css | 12.5 KiB | 12.4 KiB |
| www.pbs.org/_next/static/chunks/0f3_~aw_l8mhy.css | 13.2 KiB | 11.5 KiB |
| www.pbs.org/_next/static/chunks/0brysxoqq8n3i.css | 12.3 KiB | 11.1 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.
Multi-megabyte JavaScript bundles delay every interactive feature on the page.
This is the Lighthouse audit fired when too much JS is shipped relative to what executes. The fix isn't a config flag — it requires bundle analysis (webpack-bundle-analyzer, rollup-plugin-visualizer), splitting routes into chunks, lazy-loading off-screen components, and removing unused dependencies. Fundamentally different from minification: minifying reduces byte count, this reduces what's downloaded at all.
Source: Google web.dev / Lighthouse
| URL | Transfer Size | Est Savings |
|---|---|---|
| cdn.ketchjs.com/ketchtag/stable/v2.12/ketch-sdk.js | 257.0 KiB | 155.6 KiB |
| /pagead/managed/js/gpt/m202604200101/pubads_impl.js?cb=31... | 187.7 KiB | 131.5 KiB |
| www.googletagmanager.com/gtag/js?id=G-QCNNW9XL0J&l=GTMDataLayer&cx=c>m=4e64h1 | 171.2 KiB | 68.2 KiB |
| www.googletagmanager.com/gtm.js?id=GTM-TWTDGH&l=GTMDataLayer | 152.2 KiB | 55.5 KiB |
| www.pbs.org/_next/static/chunks/0s2nm2ovzd~eb.js | 70.2 KiB | 24.0 KiB |
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
Performance issues directly impact user engagement and conversion rates.
| Failure reason | Failure type |
|---|---|
| Pages with cache-control:no-store header cannot enter back/forward cache. | Actionable |
| Pages whose main resource has cache-control:no-store cannot enter back/forward cache. | Not actionable |
| Back/forward cache is disabled because some JavaScript network request received resource with Cache-Control: no-store header. | Not actionable |
More information about the performance of your application. These numbers don't directly affect the Performance score.
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.
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
Performance issues directly impact user engagement and conversion rates.
| Source | Description |
|---|---|
/pagead/managed/js/gpt/m202604200101/pubads_impl.js?cb=31... line 18, col 381650 | Loading the script 'https://ads.pubmatic.com/AdServer/js/google-esp.js' violates the following Content Security Policy directive: "script-src 'self' 'unsafe-eval' 'unsafe-inline' *.pbs.org *.googlesyndication.com *.adtrafficquality.google adservice.google.com adservice.google.co.in connect.facebook.net fundingchoicesmessages.google.com *.2mdn.net *.nr-data.net sb.scorecardresearch.com securepubads.g.doubleclick.net www.google-analytics.com analytics.google.com www.googletagmanager.com *.googletagservices.com 'unsafe-inline' 'unsafe-eval' *.cookielaw.org www.redditstatic.com alb.reddit.com analytics.tiktok.com s.pinimg.com *.ketchcdn.com *.ketchjs.com static.cloudflareinsights.com". Note that 'script-src-elem' was not explicitly set, so 'script-src' is used as a fallback. The action has been blocked. |
/pagead/managed/js/gpt/m202604200101/pubads_impl.js?cb=31... line 18, col 381650 | Loading the script 'https://connectid.analytics.yahoo.com/connectId-gpt.js' violates the following Content Security Policy directive: "script-src 'self' 'unsafe-eval' 'unsafe-inline' *.pbs.org *.googlesyndication.com *.adtrafficquality.google adservice.google.com adservice.google.co.in connect.facebook.net fundingchoicesmessages.google.com *.2mdn.net *.nr-data.net sb.scorecardresearch.com securepubads.g.doubleclick.net www.google-analytics.com analytics.google.com www.googletagmanager.com *.googletagservices.com 'unsafe-inline' 'unsafe-eval' *.cookielaw.org www.redditstatic.com alb.reddit.com analytics.tiktok.com s.pinimg.com *.ketchcdn.com *.ketchjs.com static.cloudflareinsights.com". Note that 'script-src-elem' was not explicitly set, so 'script-src' is used as a fallback. The action has been blocked. |
/pagead/managed/js/gpt/m202604200101/pubads_impl.js?cb=31... line 18, col 381650 | Loading the script 'https://invstatic101.creativecdn.com/encrypted-signals/encrypted-tag-g.js' violates the following Content Security Policy directive: "script-src 'self' 'unsafe-eval' 'unsafe-inline' *.pbs.org *.googlesyndication.com *.adtrafficquality.google adservice.google.com adservice.google.co.in connect.facebook.net fundingchoicesmessages.google.com *.2mdn.net *.nr-data.net sb.scorecardresearch.com securepubads.g.doubleclick.net www.google-analytics.com analytics.google.com www.googletagmanager.com *.googletagservices.com 'unsafe-inline' 'unsafe-eval' *.cookielaw.org www.redditstatic.com alb.reddit.com analytics.tiktok.com s.pinimg.com *.ketchcdn.com *.ketchjs.com static.cloudflareinsights.com". Note that 'script-src-elem' was not explicitly set, so 'script-src' is used as a fallback. The action has been blocked. |
/pagead/managed/js/gpt/m202604200101/pubads_impl.js?cb=31... line 18, col 381650 | Loading the script 'https://static.criteo.net/js/ld/publishertag.ids.js' violates the following Content Security Policy directive: "script-src 'self' 'unsafe-eval' 'unsafe-inline' *.pbs.org *.googlesyndication.com *.adtrafficquality.google adservice.google.com adservice.google.co.in connect.facebook.net fundingchoicesmessages.google.com *.2mdn.net *.nr-data.net sb.scorecardresearch.com securepubads.g.doubleclick.net www.google-analytics.com analytics.google.com www.googletagmanager.com *.googletagservices.com 'unsafe-inline' 'unsafe-eval' *.cookielaw.org www.redditstatic.com alb.reddit.com analytics.tiktok.com s.pinimg.com *.ketchcdn.com *.ketchjs.com static.cloudflareinsights.com". Note that 'script-src-elem' was not explicitly set, so 'script-src' is used as a fallback. The action has been blocked. |
Issues logged to the `Issues` panel in Chrome Devtools indicate unresolved problems. They can come from network request failures, insufficient security controls, and other browser concerns. Open up the Issues panel in Chrome DevTools for more details on each issue.
Performance issues directly impact user engagement and conversion rates.
| Issue type |
|---|
| Content security policy |
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.
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