Page summary

https://en.wikipedia.org/wiki/Barack_Obama

Tested 2025-04-05 21:04:45 using Firefox 136.0 (runtime settings).

SummaryWaterfall MetricsVideoFilmstrip CoachPageXrayCPU
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Summary

MetricValue
Page metrics
Performance Score80
Total Page Transfer Size1.3 MB
Requests96
Timing metrics
TTFB [median]513 ms
First Paint [median]1.602 s
Fully Loaded [median]3.252 s
Google Web Vitals
TTFB [median]513 ms
First Contentful Paint (FCP) [median]1.576 s
Largest Contentful Paint (LCP) [median]1.934 s
Interaction To Next Paint (INP) [median]279 ms
Visual Metrics
First Visual Change [median]1.666 s
Speed Index [median]1.725 s
Visual Complete 85% [median]1.666 s
Visual Complete 99% [median]3.066 s
Last Visual Change [median]4.166 s
Screenshot of run 2

Timings Summary

Metricminmedianmeanmax
Visual Metrics
FirstVisualChange1.633 s1.666 s1.673 s1.700 s
LastVisualChange4.166 s4.166 s4.186 s4.233 s
SpeedIndex1.672 s1.725 s1.722 s1.752 s
LargestImage1.633 s1.966 s1.873 s2.033 s
Heading1.633 s1.666 s1.673 s1.700 s
LargestContentfulPaint1.633 s1.966 s1.873 s2.033 s
LastMeaningfulPaint1.633 s1.966 s1.873 s2.033 s
VisualReadiness2.466 s2.500 s2.513 s2.567 s
VisualComplete851.633 s1.666 s1.673 s1.700 s
VisualComplete951.633 s1.900 s1.820 s1.933 s
VisualComplete993.033 s3.066 s3.066 s3.100 s
Google Web Vitals
Time To First Byte (TTFB)494 ms513 ms506 ms515 ms
Largest Contentful Paint (LCP)1.588 s1.934 s1.838 s2.017 s
First Contentful Paint (FCP)1.321 s1.576 s1.497 s1.626 s
More metrics
firstPaint1.588 s1.602 s1.611 s1.633 s
loadEventEnd2.177 s2.202 s2.202 s2.219 s
User Timing
mwStartup1.576 s1.622 s1.616 s1.638 s
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Waterfall

Run 2 SpeedIndex median

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Video

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| Filmstrip | 

Filmstrip

Use--filmstrip.showAll to show all filmstrips.

0 s
1.4 sFirst Contentful Paint 1.321 s
1.7 smwStartup 1.622 sDOM Content Loaded Time 1.627 sFirst Visual Change 1.666 sVisual Complete 85% 1.666 sHeading 1.666 s
1.8 s
1.9 s
2 sVisual Complete 95% 1.933 s
2.1 sLCP <IMG> 2.017 sLargest Image 2.033 s
2.2 s
2.3 sPage Load Time 2.214 s
2.6 s
2.9 s
3.1 sVisual Complete 99% 3.100 s
3.2 s
3.3 sFully Loaded 3.260 s
4.2 s
4.3 sLast Visual Change 4.233 s
| Performance advice | Best practice advice | Privacy advice | Page info | Technologies | 

Coach

The coach helps you find performance problems on your web page using web performance best practice rules. And gives you advice on privacy and best practices. Tested using Coach-core version 8.1.1.

I am the coach

Coach score

Performance advice (80)

TitleAdviceScore
Avoid slowing down the critical rendering path (avoidRenderBlocking)The style https://en.wikipedia.org/w/load.php?lang=en&modules=ext.cite.styles%7Cext.phonos.icons%2Cstyles%7Cext.tmh.player.styles%7Cext.uls.interlanguage%7Cext.visualEditor.desktopArticleTarget.noscript%7Cext.wikimediaBadges%7Cext.wikimediamessages.styles%7Cjquery.makeCollapsible.styles%7Cskins.vector.icons%2Cstyles%7Cskins.vector.search.codex.styles%7Cwikibase.client.init&only=styles&skin=vector-2022 is larger than the magic number TCP window size 14.5 kB. Make the file smaller and the page will render faster. The page has 1 render blocking CSS request and 0 blocking JavaScript request inside of head.95
Description: The critical rendering path is what the browser needs to do to start rendering the page. Every file requested inside of the head element will postpone the rendering of the page, because the browser need to do the request. Avoid loading JavaScript synchronously inside of the head (you should not need JavaScript to render the page), request files from the same domain as the main document (to avoid DNS lookups) and inline CSS for really fast rendering and a short rendering path.
Offenders:
  • https://en.wikipedia.org/w/load.php...ia.org/w/load.php
    • Don't scale images in the browser (avoidScalingImages)The page has 2 images that are scaled more than 100 pixels. It would be better if those images are sent so the browser don't need to scale them.80
    Description: It's easy to scale images in the browser and make sure they look good in different devices, however that is bad for performance! Scaling images in the browser takes extra CPU time and will hurt performance on mobile. And the user will download extra kilobytes (sometimes megabytes) of data that could be avoided. Don't do that, make sure you create multiple version of the same image server-side and serve the appropriate one.
    Offenders:
  • https://upload.wikimedia.org/wikipedia/commons/thumb/1/11/Barack_Obama_signature...signature.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/9/9f/Job_Growth_by_U.S._Pre...resident_-_v1.png
    • Inline CSS for faster first render (inlineCss)The page has both inline CSS and CSS requests even though it uses a HTTP/2-ish connection. If you have many users on slow connections, it can be better to only inline the CSS. Run your own tests and check the waterfall graph to see what happens.95
    Description: In the early days of the Internet, inlining CSS was one of the ugliest things you can do. That has changed if you want your page to start rendering fast for your user. Always inline the critical CSS when you use HTTP/1 and HTTP/2 (avoid doing CSS requests that block rendering) and lazy load and cache the rest of the CSS. It is a little more complicated when using HTTP/2. Does your server support HTTP push? Then maybe that can help. Do you have a lot of users on a slow connection and are serving large chunks of HTML? Then it could be better to use the inline technique, becasue some servers always prioritize HTML content over CSS so the user needs to download the HTML first, before the CSS is downloaded.
    Have a fast largest contentful paint (largestContentfulPaint) You can add fetchPriority="high" to the image to increase the load priority in Chrome.95
    Description: Largest contentful paint is one of Google Web Vitals and reports the render time of the largest image or text block visible within the viewport, relative to when the page first started loading. To be fast according to Google, it needs to render before 2.5 seconds and results over 4 seconds is poor performance.
    Avoid doing redirects (assetsRedirects)The page has 2 redirects. 1 of the redirects are from the base domain, please fix them! 1 request are from other domains, it could be 3rd-party assets doing unnecessary redirects. :(80
    Description: A redirect is one extra step for the user to download the asset. Avoid that if you want to be fast. Redirects are even more of a showstopper on mobile.
    Offenders:
  • https://en.wikipedia.org/wiki/Special:CentralAutoLogin/start?type=script&usesul3=0
  • https://login.wikimedia.org/wiki/Special:CentralAutoLogin/checkLoggedIn...gin/checkLoggedIn
    • Avoid extra requests by setting cache headers (cacheHeaders)The page has 65 requests that are missing a cache time. Configure a cache time so the browser doesn't need to download them every time. It will save 684.1 kB the next access.0
    Description: The easiest way to make your page fast is to avoid doing requests to the server. Setting a cache header on your server response will tell the browser that it doesn't need to download the asset again during the configured cache time! Always try to set a cache time if the content doesn't change for every request.
    Offenders:
  • https://upload.wikimedia.org/wikipedia/en/thumb/1/1b/Semi-protection-shackle.svg...n-shackle.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/8/8d/President_Barack_Obama..._Barack_Obama.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/1/11/Barack_Obama_signature...signature.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/c/c4/President_Barack_Obama...%28cropped%29.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/3/36/Seal_of_the_President_...ed_States.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/f/fc/U.S._Total_Deficits_vs...ses_2001-2010.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/2/25/US_Employment_Statisti...tatistics.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/9/9f/Job_Growth_by_U.S._Pre...resident_-_v1.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/6/63/Obama-venice-la.jpg/22...ama-venice-la.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/7/79/PPACA_Premium_Chart.jp...Premium_Chart.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/8/84/Percentage_of_Individu...%2C_1963-2015.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/9/99/P06409PS-0571_%2835946...3594694537%29.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/6/6f/Barack_Obama%27s_trip_..._2016_%289%29.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/7/70/Barack_Obama_with_Afgh...and_Joe_Biden.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/a/ac/Obama_and_Biden_await_..._on_bin_Laden.jpg
  • https://upload.wikimedia.org/wikipedia/en/thumb/3/33/Ann_Dunham_with_father_and_..._and_children.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/9/99/Barry_Soetoro_school_r...school_record.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/1/1b/Nuvola_apps_kaboodle.s..._kaboodle.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/2/26/Obama_family_portrait_...he_Green_Room.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/3/3d/Obamas_at_church_on_In...tion_Day_2013.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/b/b6/Obamamiltondavis1.jpg/...amiltondavis1.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/a/a4/Chicago%2C_November_2%...5471954323%29.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/f/f1/BarackObamaportrait.jp...Obamaportrait.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/3/33/Barack_obama_by_bill_c...y_bill_cramer.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/2/24/ElectoralCollege2008.s...llege2008.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/4/44/ElectoralCollege2012.s...llege2012.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/d/d7/US_President_Barack_Ob...e_-_2009Jan20.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/e/e9/Official_portrait_of_B..._Barack_Obama.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/3/32/Barack_Obama_addresses...ss_2009-02-24.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/4/4b/Barack_Obama_visiting_...rora_shooting.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/f/f6/Handshake_between_the_...C3%BAl_Castro.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/1/1b/Barack_Obama_welcomes_...e_Oval_Office.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/1/17/Barack_Obama_talks_wit...8637772147%29.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/e/eb/Vladimir_Putin_and_Bar...5-09-29%29_01.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/c/c0/Gallup_Poll-Approval_R...ack_Obama.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/9/96/Obama_Macri_October_20..._October_2017.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/1/15/P20220405AS-1082_%2852...2067439422%29.jpg
  • https://upload.wikimedia.org/wikipedia/en/thumb/6/69/P_vip.svg/28px-P_vip.svg.png
  • https://upload.wikimedia.org/wikipedia/en/thumb/a/a4/Flag_of_the_United_States.s...ed_States.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/e/ef/Flag_of_Hawaii.svg/32p...of_Hawaii.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/9/9b/Flag_of_Chicago%2C_Ill..._Illinois.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/0/01/Flag_of_Illinois.svg/4..._Illinois.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/1/17/Balance%2C_by_David.sv..._by_David.svg.png
  • https://upload.wikimedia.org/wikipedia/en/thumb/0/01/A_coloured_voting_box.svg/4...oting_box.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/c/c1/Blue_iPod_Nano.jpg/20px-Blue_iPod_Nano.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/8/87/IPhone_5.svg/13px-IPhone_5.svg.png
  • https://upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/20px-Commons-logo.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/2/24/Wikinews-logo.svg/40px...news-logo.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/f/fa/Wikiquote-logo.svg/40p...uote-logo.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Wikisource-logo.svg/40...urce-logo.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/f/ff/Wikidata-logo.svg/27px...data-logo.svg.png
  • https://upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progr...ogressive.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/2/21/Speaker_Icon.svg/15px-Speaker_Icon.svg.png
  • https://upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/1...ory_class.svg.png
  • https://upload.wikimedia.org/wikipedia/en/thumb/d/db/Symbol_list_class.svg/16px-...ist_class.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/f/f0/Seal_of_the_United_Sta...es_Senate.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/4/4b/Michelle_Obama_2013_of...cial_portrait.jpg
  • https://upload.wikimedia.org/wikipedia/en/thumb/e/ed/Nobel_Prize.png/80px-Nobel_Prize.png
  • https://upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg
  • https://upload.wikimedia.org/wikipedia/commons/4/4d/Icon_pdf_file.png
  • https://upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg
  • https://upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg
  • https://en.wikipedia.org/wiki/Special:CentralAutoLogin/start?type=script&usesul3=0
  • https://login.wikimedia.org/wiki/Special:CentralAutoLogin/checkLoggedIn...gin/checkLoggedIn
  • https://auth.wikimedia.org/loginwiki/wiki/Special:CentralAutoLogin/checkLoggedIn...gin/checkLoggedIn
    • Long cache headers is good (cacheHeadersLong)The page has 3 requests that have a shorter cache time than 30 days (but still a cache time).97
    Description: Setting a cache header is good. Setting a long cache header (at least 30 days) is even better beacause then it will stay long in the browser cache. But what do you do if that asset change? Rename it and the browser will pick up the new version.
    Offenders:
  • https://en.wikipedia.org/w/load.php...ia.org/w/load.php
  • https://en.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=vector-2022
  • https://en.wikipedia.org/w/load.php?lang=en&modules=site.styles&only=styles&skin=vector-2022
    • Total JavaScript size shouldn't be too big (javascriptSize)The total JavaScript transfer size is 293.6 kB. This is quite large. 50
    Description: A lot of JavaScript often means you are downloading more than you need. How complex is the page and what can the user do on the page? Do you use multiple JavaScript frameworks?
    Offenders:
    URLTransfer sizeContent size
    https://en.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=vector-2022 21.0 KB0 b
    https://en.wikipedia.org/w/load.php...ia.org/w/load.php 7.9 KB0 b
    https://en.wikipedia.org/w/load.php...ia.org/w/load.php 17.3 KB0 b
    https://en.wikipedia.org/w/load.php...ia.org/w/load.php 211.6 KB0 b
    https://en.wikipedia.org/w/load.php...ia.org/w/load.php 24.8 KB0 b
    https://en.wikipedia.org/w/load.php...ia.org/w/load.php 2.9 KB0 b
    https://auth.wikimedia.org/loginwiki/wiki/Special:CentralAutoLogin/checkLoggedIn...gin/checkLoggedIn 1.3 KB0 b
    Make each CSS response small (optimalCssSize)https://en.wikipedia.org/w/load.php?lang=en&modules=ext.cite.styles%7Cext.phonos.icons%2Cstyles%7Cext.tmh.player.styles%7Cext.uls.interlanguage%7Cext.visualEditor.desktopArticleTarget.noscript%7Cext.wikimediaBadges%7Cext.wikimediamessages.styles%7Cjquery.makeCollapsible.styles%7Cskins.vector.icons%2Cstyles%7Cskins.vector.search.codex.styles%7Cwikibase.client.init&only=styles&skin=vector-2022 size is 24.3 kB (24294) and that is bigger than the limit of 14.5 kB. Try to make the CSS files fit into 14.5 KB.90
    Description: Make CSS responses small to fit into the magic number TCP window size of 14.5 KB. The browser can then download the CSS faster and that will make the page start rendering earlier.
    Offenders:
    URLTransfer sizeContent size
    https://en.wikipedia.org/w/load.php...ia.org/w/load.php 23.7 KB0 b

    Best practice advice (72)

    TitleAdviceScore
    Cumulative Layout Shift (cumulativeLayoutShift)Layout Shift is not supported in this browser0
    Description: Cumulative Layout Shift measures the sum total of all individual layout shift scores for unexpected layout shift that occur. The metric is measuring visual stability by quantify how often users experience unexpected layout shifts. It is one of Google Web Vitals.
    Meta description (metaDescription)The page is missing a meta description.0
    Description: Use a page description to make the page more relevant to search engines.
    Do not send too long headers (longHeaders)https://en.wikipedia...ia.org/w/load.php has a header sourcemap that is 1316 characters long. 99
    Description: Do not send response headers that are too long.
    Offenders:
  • https://en.wikipedia.org/w/load.php...ia.org/w/load.php
    • Avoid unnecessary headers (unnecessaryHeaders)There are 27 responses that sets both a max-age and expires header. There are 96 responses that sets a server header. 0
    Description: Do not send headers that you don't need. We look for p3p, cache-control and max-age, pragma, server and x-frame-options headers. Have a look at Andrew Betts - Headers for Hackers talk as a guide https://www.youtube.com/watch?v=k92ZbrY815c or read https://www.fastly.com/blog/headers-we-dont-want.
    Offenders:
  • https://en.wikipedia.org/wiki/Barack_Obama
  • https://en.wikipedia.org/w/load.php...ia.org/w/load.php
  • https://en.wikipedia.org/w/load.php...ia.org/w/load.php
  • https://en.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=vector-2022
  • https://en.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=vector-2022
  • https://en.wikipedia.org/w/load.php?lang=en&modules=site.styles&only=styles&skin=vector-2022
  • https://en.wikipedia.org/w/load.php?lang=en&modules=site.styles&only=styles&skin=vector-2022
  • https://en.wikipedia.org/static/images/icons/wikipedia.png
  • https://en.wikipedia.org/static/images/icons/wikipedia.png
  • https://en.wikipedia.org/static/images/mobile/copyright/wikipedia-wordmark-en.svg
  • https://en.wikipedia.org/static/images/mobile/copyright/wikipedia-wordmark-en.svg
  • https://en.wikipedia.org/static/images/mobile/copyright/wikipedia-tagline-en.svg
  • https://en.wikipedia.org/static/images/mobile/copyright/wikipedia-tagline-en.svg
  • https://upload.wikimedia.org/wikipedia/en/thumb/1/1b/Semi-protection-shackle.svg...n-shackle.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/8/8d/President_Barack_Obama..._Barack_Obama.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/1/11/Barack_Obama_signature...signature.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/c/c4/President_Barack_Obama...%28cropped%29.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/3/36/Seal_of_the_President_...ed_States.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/f/fc/U.S._Total_Deficits_vs...ses_2001-2010.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/2/25/US_Employment_Statisti...tatistics.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/9/9f/Job_Growth_by_U.S._Pre...resident_-_v1.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/6/63/Obama-venice-la.jpg/22...ama-venice-la.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/7/79/PPACA_Premium_Chart.jp...Premium_Chart.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/8/84/Percentage_of_Individu...%2C_1963-2015.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/9/99/P06409PS-0571_%2835946...3594694537%29.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/6/6f/Barack_Obama%27s_trip_..._2016_%289%29.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/7/70/Barack_Obama_with_Afgh...and_Joe_Biden.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/a/ac/Obama_and_Biden_await_..._on_bin_Laden.jpg
  • https://upload.wikimedia.org/wikipedia/en/thumb/3/33/Ann_Dunham_with_father_and_..._and_children.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/9/99/Barry_Soetoro_school_r...school_record.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/1/1b/Nuvola_apps_kaboodle.s..._kaboodle.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/2/26/Obama_family_portrait_...he_Green_Room.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/3/3d/Obamas_at_church_on_In...tion_Day_2013.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/b/b6/Obamamiltondavis1.jpg/...amiltondavis1.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/a/a4/Chicago%2C_November_2%...5471954323%29.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/f/f1/BarackObamaportrait.jp...Obamaportrait.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/3/33/Barack_obama_by_bill_c...y_bill_cramer.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/2/24/ElectoralCollege2008.s...llege2008.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/4/44/ElectoralCollege2012.s...llege2012.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/d/d7/US_President_Barack_Ob...e_-_2009Jan20.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/e/e9/Official_portrait_of_B..._Barack_Obama.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/3/32/Barack_Obama_addresses...ss_2009-02-24.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/4/4b/Barack_Obama_visiting_...rora_shooting.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/f/f6/Handshake_between_the_...C3%BAl_Castro.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/1/1b/Barack_Obama_welcomes_...e_Oval_Office.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/1/17/Barack_Obama_talks_wit...8637772147%29.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/e/eb/Vladimir_Putin_and_Bar...5-09-29%29_01.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/c/c0/Gallup_Poll-Approval_R...ack_Obama.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/9/96/Obama_Macri_October_20..._October_2017.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/1/15/P20220405AS-1082_%2852...2067439422%29.jpg
  • https://upload.wikimedia.org/wikipedia/en/thumb/6/69/P_vip.svg/28px-P_vip.svg.png
  • https://upload.wikimedia.org/wikipedia/en/thumb/a/a4/Flag_of_the_United_States.s...ed_States.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/e/ef/Flag_of_Hawaii.svg/32p...of_Hawaii.svg.png
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    • Privacy advice (88)

    TitleAdviceScore
    Use a good Content-Security-Policy header to make sure you you avoid Cross Site Scripting (XSS) attacks. (contentSecurityPolicyHeader)Set a Content-Security-Policy header to make sure you are not open for Cross Site Scripting (XSS) attacks. You can start with setting a Content-Security-Policy-Report-Only header, that will only report the violation, not stop the download.0
    Description: Content Security Policy is delivered via a HTTP response header, and defines approved sources of content that the browser may load. It can be an effective countermeasure to Cross Site Scripting (XSS) attacks and is also widely supported and usually easily deployed. https://scotthelme.co.uk/content-security-policy-an-introduction/.
    Offenders:
  • https://en.wikipedia.org/wiki/Barack_Obama
    • Set a referrer-policy header to make sure you do not leak user information. (referrerPolicyHeader)Set a referrer-policy header to make sure you do not leak user information.0
    Description: Referrer Policy is a new header that allows a site to control how much information the browser includes with navigations away from a document and should be set by all sites. https://scotthelme.co.uk/a-new-security-header-referrer-policy/.
    Offenders:
  • https://en.wikipedia.org/wiki/Barack_Obama

    • Page info

    Page info
    TitleBarack Obama - Wikipedia
    GeneratorMediaWiki 1.44.0-wmf.23
    Width1920
    Height61921
    DOM elements21483
    Avg DOM depth17
    Max DOM depth32
    Iframes0
    Script tags5
    Local storage984.7 KB
    Session storage0 b
    Network Information APIunknown
    Resource Hints
    dns-prefetch
    https://meta.wikimedia.org/
    https://en.wikipedia.org/wiki/auth.wikimedia.org
    preconnect
    https://upload.wikimedia.org/

    Technologies used to build the page.

    Data collected using Wappalyzer version 6.10.66. With updated code from Webappanalyzer 2024-12-27. Use --browsertime.firefox.includeResponseBodies htmlor --browsertime.chrome.includeResponseBodies htmlto help Wappalyzer find more information about technologies used.

    TechnologyConfidenceCategory
    MediaWiki 100  Wikis
    PHP 100  Programming languages
    HSTS 100  Security
    HTTP/2 100  Miscellaneous
    | Browser metrics | Visual Metrics | Largest Contentful Paint | Interaction To Next Paint | Visual Elements | Server timings | 

    Data from run 2

    Visual Metrics

    Visual Metrics
    First Visual Change1.666 s
    Speed Index1.725 s
    Largest Image2.033 s
    Heading1.666 s
    LargestContentfulPaint2.033 s
    Last Meaningful Paint2.033 s
    Largest Contentful Paint2.033 s
    Visual Complete 85%1.666 s
    Visual Complete 95%1.933 s
    Visual Complete 99%3.100 s
    Last Visual Change4.233 s
    Visual Readiness2.567 s

    Browser Metrics

    Navigation Timing
    backEndTime494 ms
    domContentLoadedTime1.627 s
    domInteractiveTime1.607 s
    domainLookupTime86 ms
    frontEndTime1.720 s
    pageDownloadTime0 ms
    pageLoadTime2.214 s
    redirectionTime0 ms
    serverConnectionTime203 ms
    serverResponseTime193 ms
    Google Web Vitals
    Time to first byte (TTFB)494 ms
    First Contentful Paint (FCP)1.321 s
    Largest Contentful Paint (LCP)2.017 s
    Interaction to next paint (INP)294.06 ms
    Extra timings
    TTFB494 ms
    Time To Contentful Paint1.611 s
    Time To First Interactive3.124 s
    Load Event End2.215 s
    Fully loaded3.260 s
    User Timing marks
    mwStartup1.622 s

    Largest Contentful Paint

    When in time the page main content is rendered (collected using the Largest Contentful Paint API). Read more about Largest Contentful Paint.

    Element typeIMG
    Element/tag<img alt="Obama standing in the Oval Office with his arms folded and smiling" src="//upload.wikimedia.org/wikipedia/commons/thumb/8/8d/President_Barack_Obama.jpg/250px-President_Barack_Obama.jpg" decoding="async" width="220" height="275" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/8d/President_Barack_Obama.jpg/330px-President_Barack_Obama.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/8/8d/President_Barack_Obama.jpg/500px-President_Barack_Obama.jpg 2x" data-file-width="2687" data-file-height="3356">
    Render time 2.017 s
    Element render delay12 ms
    TTFB494 ms
    Resource delay125 ms
    Resource load duration1.386 s
    Load time2.006 s
    URL https://upload.wikim..._Barack_Obama.jpg
    Size (width*height)60500
    DOM path
    div:eq(1) > div > div:eq(2) > main#content > div#bodyContent > div#mw-content-text > div:eq(0) > table:eq(0) > tbody > tr:eq(1) > td > span > a > img> div:eq(1) > div > div:eq(2) > main#content > div#bodyContent > div#mw-content-text > div:eq(0) > table:eq(0) > tbody > tr:eq(1) > td > span > a > img>
    LCP

    The largest contentful paint is highlighted in the image. If no element is highlighted the element was removed before the screenshot or the LCP API couldn't find the element.

    The Largest Contentful Paint API highlighted this image as a part of the LCP.

    LCP

    Interaction to Next Paint

    Interaction to Next Paint (INP) is a metric that try to measure responsiveness. It's useful if you are testing user journeys. Read more about Interaction to Next Paint.

    The measured latency was 294.06 ms.

    Event typemouseover
    Element typeHTML
    Element class nameclient-js vector-feature-language-in-header-enabled vector-feature-language-in-main-page-header-disabled vector-feature-page-tools-pinned-disabled vector-feature-toc-pinned-clientpref-1 vector-feature-main-menu-pinned-disabled vector-feature-limited-width-clientpref-1 vector-feature-limited-width-content-enabled vector-feature-custom-font-size-clientpref-1 vector-feature-appearance-pinned-clientpref-1 vector-feature-night-mode-enabled skin-theme-clientpref-day vector-sticky-header-enabled vector-toc-available vector-animations-ready ve-available
    Event targethtml.client-js.vector-feature-language-in-header-enabled.vector-feature-language-in-main-page-header-disabled.vector-feature-page-tools-pinned-disabled.vector-feature-toc-pinned-clientpref-1.vector-feature-main-menu-pinned-disabled.vector-feature-limited-width-clientpref-1.vector-feature-limited-width-content-enabled.vector-feature-custom-font-size-clientpref-1.vector-feature-appearance-pinned-clientpref-1.vector-feature-night-mode-enabled.skin-theme-clientpref-day.vector-sticky-header-enabled.vector-toc-available.vector-animations-ready.ve-available
    Load state when the event happenedloading

    Server timings

    namedurationdescription
    cache0hit-front
    host0cp3067

    Custom metrics collected through JavaScript

    There are no custom configured scripts.

    Extra metrics collected using scripting

    There are no custom extra metrics from scripting.

    Visual Elements

    NameDisplay TimeX YWidthHeight
    LargestImage (250px-President_Barack_Obama.jpg)2.033 s 1156 314 220 275
    <img alt="Obama standing in the Oval Office with his arms folded and smiling" src="//upload.wikimedia.org/wikipedia/commons/thumb/8/8d/President_Barack_Obama.jpg/250px-President_Barack_Obama.jpg" decoding="async" width="220" height="275" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/8d/President_Barack_Obama.jpg/330px-President_Barack_Obama.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/8/8d/President_Barack_Obama.jpg/500px-President_Barack_Obama.jpg 2x" data-file-width="2687" data-file-height="3356">
    Heading1.666 s 486 90 767 40
    <h1 id="firstHeading" class="firstHeading mw-first-heading"></h1>
    LargestContentfulPaint (250px-President_Barack_Obama.jpg)2.033 s 1156 314 220 275
    <img alt="Obama standing in the Oval Office with his arms folded and smiling" src="//upload.wikimedia.org/wikipedia/commons/thumb/8/8d/President_Barack_Obama.jpg/250px-President_Barack_Obama.jpg" decoding="async" width="220" height="275" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/8d/President_Barack_Obama.jpg/330px-President_Barack_Obama.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/8/8d/President_Barack_Obama.jpg/500px-President_Barack_Obama.jpg 2x" data-file-width="2687" data-file-height="3356">
    | Summary  | Largest responses  | Requests and sizes per content type  | Data per domain | Expires and last modified statistics  | 

    PageXray

    How the page is built.

    Summary
    HTTP versionHTTP/2.0
    Total requests96
    Total domains4
    Total transfer size1.3 MB
    Total content size0 b
    Responses missing compression0
    Number of cookies3
    Third party cookies0
    Requests per response code
    20094
    3022

    Largest assets on the page (by transfer size)

    URLTypeTransfer SizeContent Size
    https://en.wikipedia...wiki/Barack_Obamahtml295.9 KB0 b
    https://en.wikipedia...ia.org/w/load.phpjavascript211.6 KB0 b
    https://upload.wikim...resident_-_v1.pngimage54.6 KB0 b
    https://upload.wikim...llege2008.svg.pngimage31.6 KB0 b
    https://en.wikipedia...ia.org/w/load.phpjavascript24.8 KB0 b
    https://en.wikipedia...ia.org/w/load.phpcss23.7 KB0 b
    https://upload.wikim..._2016_%289%29.jpgimage23.2 KB0 b
    https://upload.wikim...y_bill_cramer.jpgimage23.1 KB0 b
    https://upload.wikim...5471954323%29.jpgimage23.0 KB0 b
    https://upload.wikim..._Barack_Obama.jpgimage22.3 KB0 b
    https://upload.wikim...llege2012.svg.pngimage22.2 KB0 b
    https://upload.wikim...2067439422%29.jpgimage21.2 KB0 b
    https://en.wikipedia...ia.org/w/load.phpjavascript21.0 KB0 b
    https://upload.wikim..._and_children.jpgimage20.9 KB0 b
    https://upload.wikim...school_record.jpgimage19.1 KB0 b
    https://upload.wikim...ack_Obama.svg.pngimage18.7 KB0 b
    https://upload.wikim...amiltondavis1.jpgimage18.5 KB0 b
    https://upload.wikim...e_-_2009Jan20.jpgimage17.5 KB0 b
    https://upload.wikim..._Barack_Obama.jpgimage17.3 KB0 b
    https://en.wikipedia...ia.org/w/load.phpjavascript17.3 KB0 b

    Requests and sizes per content type

    ContentHeader SizeTransfer SizeContent SizeRequests
    html1.4 KB295.9 KB0 b1
    css1.9 KB26.8 KB0 b2
    javascript8.8 KB286.8 KB0 b7
    image63.6 KB676.0 KB0 b61
    svg22.0 KB33.4 KB0 b22
    favicon962 B1.9 KB0 b1
    Total98.6 KB1.3 MB0 b94

    Data per domain

    DomainTotal download timeTransfer SizeContent SizeRequests
    en.wikipedia.org6.588 s656.1 KB0 b32
    upload.wikimedia.org58.898 s664.5 KB0 b62
    login.wikimedia.org191 ms1.3 KB0 b1
    auth.wikimedia.org206 ms1.3 KB0 b1

    Expires and last modified statistics

    typeminmedianmax
    Expires-1 week0 seconds1 year
    Last modified10 minutes39 weeks8 years

    CPU