Page summary

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

Tested 2025-12-07 16:46:18 using Chrome 142.0.7444.59 (runtime settings).

SummaryWaterfall MetricsVideoFilmstrip CoachPageXrayCPU
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Summary

MetricValue
Page metrics
Performance Score71
Total Page Transfer Size1.5 MB
Requests102
Timing metrics
TTFB [median]488 ms
First Paint [median]1.432 s
Fully Loaded [median]11.540 s
Google Web Vitals
TTFB [median]488 ms
First Contentful Paint (FCP) [median]1.432 s
Largest Contentful Paint (LCP) [median]1.432 s
Cumulative Layout Shift (CLS) [median]0.15
Interaction To Next Paint (INP) [median]920 ms
Total Blocking Time [median]845 ms
Max Potential FID [median]395 ms
CPU metrics
CPU long tasks [median]8
CPU longest task duration460 ms
CPU last long task happens at10.675 s
Visual Metrics
First Visual Change [median]1.433 s
Speed Index [median]3.430 s
Visual Complete 85% [median]12.000 s
Visual Complete 99% [median]14.700 s
Last Visual Change [median]14.933 s
Screenshot of run 5

Timings Summary

Metricminmedianmeanmax
Visual Metrics
FirstVisualChange1.400 s1.433 s1.428 s1.433 s
LastVisualChange14.833 s14.933 s15.390 s18.166 s
SpeedIndex3.369 s3.430 s3.505 s4.032 s
LargestImage11.866 s12.000 s11.981 s12.033 s
Heading11.866 s12.000 s11.981 s12.033 s
LargestContentfulPaint11.866 s12.000 s11.981 s12.033 s
LastMeaningfulPaint11.866 s12.000 s11.981 s12.033 s
VisualReadiness13.400 s13.500 s13.962 s16.766 s
VisualComplete8511.433 s12.000 s11.895 s12.033 s
VisualComplete9512.833 s12.900 s13.633 s18.066 s
VisualComplete9913.966 s14.700 s15.009 s18.066 s
Google Web Vitals
Time To First Byte (TTFB)486 ms488 ms490 ms504 ms
Largest Contentful Paint (LCP)1.412 s1.432 s1.428 s1.444 s
First Contentful Paint (FCP)1.412 s1.432 s1.428 s1.444 s
Cumulative Layout Shift (CLS)0.15270.15420.15450.156
More metrics
firstPaint1.412 s1.432 s1.428 s1.444 s
loadEventEnd2.193 s2.200 s2.304 s2.926 s
User Timing
mwStartup1.418 s1.423 s1.430 s1.451 s
mwCentralNoticeBanner2.767 s2.908 s2.880 s2.950 s
CPU
Total Blocking Time832 ms845 ms849 ms872 ms
Max Potential FID389 ms395 ms398 ms417 ms
CPU long tasks 8888
CPU last long task happens at10.566 s10.675 s10.653 s10.719 s
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Waterfall

Run 5 SpeedIndex median

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Video

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| Filmstrip | 

Filmstrip

Use--filmstrip.showAll to show all filmstrips.

0 s
1 sCPU Long Task duration 438 ms
1.5 smwStartup 1.426 sFirst Contentful Paint 1.432 sLCP <P> 1.432 sFirst Visual Change 1.433 sDOM Content Loaded Time 1.438 s
1.6 s
1.7 s
2.3 sPage Load Time 2.206 s
2.4 sCPU Long Task duration 142 ms
2.5 sCPU Long Task duration 106 ms
2.6 sCPU Long Task duration 96 ms
2.7 sCPU Long Task duration 61 ms
2.8 s
2.9 smwCentralNoticeBanner 2.810 sCPU Long Task duration 121 ms
3 sCPU Long Task duration 400 ms
3.4 s
9.8 s
9.9 s
10.1 s
10.6 sCPU Long Task duration 292 ms
11 sLayout Shift 0.00229 10.977 s
11.1 sLayout Shift 0.00310 11.010 sLayout Shift 0.00353 11.037 sLayout Shift 0.00222 11.051 sLayout Shift 0.00234 11.081 s
11.2 sLayout Shift 0.00937 11.112 sLayout Shift 0.00386 11.138 sLayout Shift 0.00448 11.155 sLayout Shift 0.01125 11.182 s
11.3 sLayout Shift 0.00686 11.202 sLayout Shift 0.00778 11.223 sLayout Shift 0.01744 11.243 sLayout Shift 0.00870 11.266 sLayout Shift 0.00827 11.292 s
11.4 sLayout Shift 0.01356 11.319 sLayout Shift 0.01067 11.344 sLayout Shift 0.00438 11.377 sLayout Shift 0.00745 11.398 s
11.5 sLayout Shift 0.00327 11.421 sLayout Shift 0.00284 11.436 sLayout Shift 0.00280 11.458 sLayout Shift 0.00449 11.477 sLayout Shift 0.00196 11.498 s
11.6 sLayout Shift 0.00188 11.517 sFully Loaded 11.540 sLayout Shift 0.00188 11.542 sLayout Shift 0.00292 11.565 sLayout Shift 0.00055 11.587 s
11.7 sLayout Shift 0.00235 11.633 sLayout Shift 0.00163 11.676 s
11.8 s
11.9 sVisual Complete 85% 11.900 sLargest Image 11.900 sHeading 11.900 s
12 s
12.1 s
12.2 s
12.3 s
12.4 s
12.5 s
12.6 s
12.7 s
12.8 s
12.9 sVisual Complete 95% 12.833 s
13 s
13.1 s
13.2 s
13.3 s
13.4 s
13.5 s
13.6 s
13.7 s
13.8 s
13.9 s
14 s
14.1 s
14.2 s
14.3 s
14.4 s
14.5 s
14.6 s
14.7 sVisual Complete 99% 14.700 s
14.8 s
14.9 sLast Visual Change 14.833 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 8.1.3.

I am the coach

Coach score

Performance advice (71)

TitleAdviceScore
Avoid slowing down the critical rendering path (avoidRenderBlocking)The page has 2 blocking requests and 0 in body parser blocking (0 JavaScript and 2 CSS). There are 1 potentially render blocking requests. You need to verify if it is render blocking: https://en.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=vector-202299
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 7 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.30
    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://en.wikipedia.org/static/images/mobile/copyright/wikipedia-wordmark-en.svg
  • https://en.wikipedia.org/static/images/mobile/copyright/wikipedia-tagline-en.svg
  • 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
  • https://upload.wikimedia.org/wikipedia/commons/thumb/7/79/PPACA_Premium_Chart.jp...Premium_Chart.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/2/28/Former_President_Barac...%28cropped%29.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/4/4b/Michelle_Obama_2013_of...cial_portrait.jpg
    • 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.
    Avoid CPU Long Tasks (longTasks)The page has 8 CPU long tasks with the total of 1.625 s. The total blocking time is 845 ms and 1 long task before first contentful paint with total time of 430 ms. However the CPU Long Task is depending on the computer/phones actual CPU speed, so you should measure this on the same type of the device that your user is using. Use Geckoprofiler for Firefox or Chromes tracelog to debug your long tasks.0
    Description: Long CPU tasks locks the thread. To the user this is commonly visible as a "locked up" page where the browser is unable to respond to user input; this is a major source of bad user experience on the web today. However the CPU Long Task is depending on the computer/phones actual CPU speed, so you should measure this on the same type of the device that your user is using. To debug you should use the Chrome timeline log and drag/drop it into devtools or use Firefox Geckoprofiler.
    Offenders:
  • unknown
  • self
  • self
  • self
  • unknown
  • self
  • self
  • self
    • Avoid doing redirects (assetsRedirects)The page has 1 redirect. 1 of the redirects are from the base domain, please fix them! 90
    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?useformat=desktop&type=script&usesul3=1
    • Avoid extra requests by setting cache headers (cacheHeaders)The page has 69 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 808.9 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/8/8c/Extended-protection-shackle...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/e/e7/Obama_2008_portrait_cr...se_cropped%29.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/3/36/Seal_of_the_President_...ed_States.svg.png
  • https://upload.wikimedia.org/wikipedia/en/thumb/3/33/Ann_Dunham_with_father_and_..._and_children.jpg
  • https://upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/2...ory_class.svg.png
  • https://upload.wikimedia.org/wikipedia/en/thumb/d/db/Symbol_list_class.svg/20px-...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/120px-Nobel_Prize.png
  • 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/2/24/ElectoralCollege2008.s...llege2008.svg.png
  • 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/4/44/ElectoralCollege2012.s...llege2012.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/5/5b/Greater_coat_of_arms_o...ed_States.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/1/1b/Yellow_flag_waving.svg...ag_waving.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/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/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/25...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/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/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/commons/thumb/2/28/Former_President_Barac...%28cropped%29.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/c/c0/Gallup_Poll-Approval_R...ack_Obama.svg.png
  • https://upload.wikimedia.org/wikipedia/en/thumb/6/69/P_vip.svg/40px-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/40p...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/9/9d/IPhone5white.png/20px-IPhone5white.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/40px...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/20px-Speaker_Icon.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg
  • 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/d/d6/Lock-gray-alt-2.svg
  • https://en.wikipedia.org/wiki/Special:CentralAutoLogin/start?useformat=desktop&type=script&usesul3=1
  • https://meta.wikimedia.org/w/index.php...a.org/w/index.php
  • https://auth.wikimedia.org/metawiki/wiki/Special:CentralAutoLogin/checkLoggedIn...gin/checkLoggedIn
    • Long cache headers is good (cacheHeadersLong)The page has 5 requests that have a shorter cache time than 30 days (but still a cache time).95
    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
  • https://en.wikipedia.org/api/rest_v1/page/summary/Columbia_University
  • https://en.wikipedia.org/api/rest_v1/page/summary/Illinois_state_senator
    • Total image size shouldn't be too big (imageSize)The page total image size is 710.4 kB. It's really big. Is the page using the right format for the images? Can they be lazy loaded? Are they compressed as good as they can be? Make them smaller by using https://imageoptim.com/.50
    Description: Avoid having too many large images on the page. The images will not affect the first paint of the page, but it will eat bandwidth for the user.
    Total JavaScript size shouldn't be too big (javascriptSize)The total JavaScript transfer size is 411.1 kB and the uncompressed size is 1.5 MB. This is totally crazy! There is really room for improvement here. 0
    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 21.2 KB63.6 KB
    https://en.wikipedia.org/w/load.php...ia.org/w/load.php 7.8 KB22.4 KB
    https://en.wikipedia.org/w/load.php...ia.org/w/load.php 17.6 KB60.1 KB
    https://en.wikipedia.org/w/load.php...ia.org/w/load.php 211.5 KB846.2 KB
    https://en.wikipedia.org/w/load.php...ia.org/w/load.php 24.7 KB116.8 KB
    https://en.wikipedia.org/w/load.php...ia.org/w/load.php 2.8 KB14.8 KB
    https://meta.wikimedia.org/w/index.php...a.org/w/index.php 56.6 KB220.3 KB
    https://auth.wikimedia.org/metawiki/wiki/Special:CentralAutoLogin/checkLoggedIn...gin/checkLoggedIn 1.4 KB254 B
    https://en.wikipedia.org/w/load.php?lang=en&modules=vue&skin=vector-2022&version=1hv35 57.8 KB156.2 KB
    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 24.7 kB (24663) 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 24.1 KB185.0 KB
    Don't use private headers on static content (privateAssets)The page has 4 requests with private headers. The main page has a private header. It could be right in some cases where the user can be logged in and served specific content. But if your asset is static it should never be private. Make sure that the assets really should be private and only used by one user. Otherwise, make it cacheable for everyone.70
    Description: If you set private headers on content, that means that the content are specific for that user. Static content should be able to be cached and used by everyone. Avoid setting the cache header to private.
    Offenders:
  • https://en.wikipedia.org/wiki/Barack_Obama
  • https://en.wikipedia.org/wiki/Special:CentralAutoLogin/start?useformat=desktop&type=script&usesul3=1
  • https://meta.wikimedia.org/w/index.php...a.org/w/index.php
  • https://auth.wikimedia.org/metawiki/wiki/Special:CentralAutoLogin/checkLoggedIn...gin/checkLoggedIn

    • Best practice advice (80)

    TitleAdviceScore
    Cumulative Layout Shift (cumulativeLayoutShift)You have a cumulative layout shift score (0.1554) that needs improvements. It is in the Google Web Vitals needs improvement range, shift higher than 0.1. You should manually check the filmstrip or video and check if it will affect the user.50
    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 1311 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 use too many response headers (manyHeaders)https://en.wikipedia...lumbia_University has 31 headers.https://en.wikipedia...ois_state_senator has 31 headers.98
    Description: Avoid send too many response headers.
    Offenders:
  • https://en.wikipedia.org/api/rest_v1/page/summary/Columbia_University
  • https://en.wikipedia.org/api/rest_v1/page/summary/Illinois_state_senator
    • Avoid unnecessary headers (unnecessaryHeaders)There are 26 responses that sets both a max-age and expires header. There are 102 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
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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 1.46.0-wmf.5
    Width1904
    Height58161
    DOM elements22145
    Avg DOM depth17
    Max DOM depth32
    Iframes0
    Script tags6
    Local storage975.5 KB
    Session storage63 B
    Network Information API3g
    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 6.10.54. 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
    Apache Traffic Server 9.2.11100  Web servers
    HSTS 100  Security
    | Browser metrics | Visual Metrics | Largest Contentful Paint | Cumulative Layout Shift | Interaction To Next Paint | Long Aninimation Frames | Visual Elements | Server timings | 

    Data from run 5

    Visual Metrics

    Visual Metrics
    First Visual Change1.433 s
    Speed Index3.430 s
    Largest Image11.900 s
    Heading11.900 s
    LargestContentfulPaint11.900 s
    Last Meaningful Paint11.900 s
    Largest Contentful Paint11.900 s
    Visual Complete 85%11.900 s
    Visual Complete 95%12.833 s
    Visual Complete 99%14.700 s
    Last Visual Change14.833 s
    Visual Readiness13.400 s

    Browser Metrics

    Navigation Timing
    backEndTime488 ms
    domContentLoadedTime1.438 s
    domInteractiveTime1.438 s
    domainLookupTime88 ms
    frontEndTime1.322 s
    pageDownloadTime396 ms
    pageLoadTime2.206 s
    redirectionTime0 ms
    serverConnectionTime201 ms
    serverResponseTime591 ms
    Google Web Vitals
    Time to first byte (TTFB)488 ms
    First Contentful Paint (FCP)1.432 s
    Largest Contentful Paint (LCP)1.432 s
    Cumulative Layout Shift (CLS)0.15
    Interaction to next paint (INP)928 ms
    Total Blocking Time (TBT)868 ms
    First Contentful Paint info
    Elements that needed recalculate style before FCP15893
    Time spent in recalculate style before FCP216.708 ms
    Extra timings
    TTFB488 ms
    First Paint1.432 s
    Load Event End2.206 s
    Fully loaded11.540 s
    User Timing marks
    mwStartup1.426 s
    mwCentralNoticeBanner2.810 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 typeP
    Element/tag<p></p>
    Render time 1.432 s
    Element render delay944 ms
    TTFB488 ms
    Resource delay0 ms
    Resource load duration0 ms
    Elements that needed recalculate style before LCP15893
    Time spent in recalculate style before LCP216.708 ms
    Load time0 ms
    Size (width*height)173125
    DOM path
    div:eq(3) > div > div:eq(2) > main#content > div#bodyContent > div#mw-content-text > div:eq(0) > p:eq(2)> div:eq(3) > div > div:eq(2) > main#content > div#bodyContent > div#mw-content-text > div:eq(0) > p:eq(2)>
    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.

    Detected Cumulative Layout Shift

    0.15413 cumulative layout shift collected from the Cumulative Layout Shift API.

    These HTML elements contribute most to the Cumulative Layout Shifts of the page. The higher score, the more layout shift.

    ScoreHTML Element
    0.01744<div id="wmde-banner-app" data-v-app=""></div>,<header class="vector-header mw-header no-font-mode-scale"></header>,<span class="cdx-text-input__icon cdx-text-input__start-icon"></span>,<div class="mw-page-container"></div>
    body > div#wmde-banner-app,body > div:eq(2) > header,body > div:eq(2) > header > div:eq(1) > div#p-search > div > div > form#searchform > div#simpleSearch > div > span,body > div:eq(3)
    0.01356<div id="wmde-banner-app" data-v-app=""></div>,<header class="vector-header mw-header no-font-mode-scale"></header>,<span class="cdx-text-input__icon cdx-text-input__start-icon"></span>,<div class="mw-page-container"></div>
    body > div#wmde-banner-app,body > div:eq(2) > header,body > div:eq(2) > header > div:eq(1) > div#p-search > div > div > form#searchform > div#simpleSearch > div > span,body > div:eq(3)
    0.01125<div id="wmde-banner-app" data-v-app=""></div>,<header class="vector-header mw-header no-font-mode-scale"></header>,<span class="cdx-text-input__icon cdx-text-input__start-icon"></span>,<div class="mw-page-container"></div>
    body > div#wmde-banner-app,body > div:eq(2) > header,body > div:eq(2) > header > div:eq(1) > div#p-search > div > div > form#searchform > div#simpleSearch > div > span,body > div:eq(3)
    0.01067<div id="wmde-banner-app" data-v-app=""></div>,<header class="vector-header mw-header no-font-mode-scale"></header>,<span class="cdx-text-input__icon cdx-text-input__start-icon"></span>,<div class="mw-page-container"></div>
    body > div#wmde-banner-app,body > div:eq(2) > header,body > div:eq(2) > header > div:eq(1) > div#p-search > div > div > form#searchform > div#simpleSearch > div > span,body > div:eq(3)
    0.00937<div id="wmde-banner-app" data-v-app=""></div>,<header class="vector-header mw-header no-font-mode-scale"></header>,<span class="cdx-text-input__icon cdx-text-input__start-icon"></span>,<div class="mw-page-container"></div>
    body > div#wmde-banner-app,body > div:eq(2) > header,body > div:eq(2) > header > div:eq(1) > div#p-search > div > div > form#searchform > div#simpleSearch > div > span,body > div:eq(3)
    0.00870<div id="wmde-banner-app" data-v-app=""></div>,<header class="vector-header mw-header no-font-mode-scale"></header>,<span class="cdx-text-input__icon cdx-text-input__start-icon"></span>,<div class="mw-page-container"></div>
    body > div#wmde-banner-app,body > div:eq(2) > header,body > div:eq(2) > header > div:eq(1) > div#p-search > div > div > form#searchform > div#simpleSearch > div > span,body > div:eq(3)
    0.00827<div id="wmde-banner-app" data-v-app=""></div>,<header class="vector-header mw-header no-font-mode-scale"></header>,<div class="mw-page-container"></div>
    body > div#wmde-banner-app,body > div:eq(2) > header,body > div:eq(3)
    0.00778<div id="wmde-banner-app" data-v-app=""></div>,<header class="vector-header mw-header no-font-mode-scale"></header>,<div class="mw-page-container"></div>
    body > div#wmde-banner-app,body > div:eq(2) > header,body > div:eq(3)
    0.00745<div id="wmde-banner-app" data-v-app=""></div>,<header class="vector-header mw-header no-font-mode-scale"></header>,<div class="mw-page-container"></div>
    body > div#wmde-banner-app,body > div:eq(2) > header,body > div:eq(3)
    0.00686<div id="wmde-banner-app" data-v-app=""></div>,<header class="vector-header mw-header no-font-mode-scale"></header>,<div class="mw-page-container"></div>
    body > div#wmde-banner-app,body > div:eq(2) > header,body > div:eq(3)
    0.00449<div id="wmde-banner-app" data-v-app=""></div>,<header class="vector-header mw-header no-font-mode-scale"></header>,<div class="mw-page-container"></div>
    body > div#wmde-banner-app,body > div:eq(2) > header,body > div:eq(3)
    0.00448<div id="wmde-banner-app" data-v-app=""></div>,<header class="vector-header mw-header no-font-mode-scale"></header>,<div class="mw-page-container"></div>
    body > div#wmde-banner-app,body > div:eq(2) > header,body > div:eq(3)
    0.00438<div id="wmde-banner-app" data-v-app=""></div>,<header class="vector-header mw-header no-font-mode-scale"></header>,<div class="mw-page-container"></div>
    body > div#wmde-banner-app,body > div:eq(2) > header,body > div:eq(3)
    0.00386<div id="wmde-banner-app" data-v-app=""></div>,<header class="vector-header mw-header no-font-mode-scale"></header>,<div class="mw-page-container"></div>
    body > div#wmde-banner-app,body > div:eq(2) > header,body > div:eq(3)
    0.00353<div id="wmde-banner-app" data-v-app=""></div>,<header class="vector-header mw-header no-font-mode-scale"></header>,<div class="mw-page-container"></div>
    body > div#wmde-banner-app,body > div:eq(2) > header,body > div:eq(3)
    0.00327<div id="wmde-banner-app" data-v-app=""></div>,<header class="vector-header mw-header no-font-mode-scale"></header>,<div class="mw-page-container"></div>
    body > div#wmde-banner-app,body > div:eq(2) > header,body > div:eq(3)
    0.00310<div id="wmde-banner-app" data-v-app=""></div>,<header class="vector-header mw-header no-font-mode-scale"></header>,<div class="mw-page-container"></div>
    body > div#wmde-banner-app,body > div:eq(2) > header,body > div:eq(3)
    0.00292<div id="wmde-banner-app" data-v-app=""></div>,<header class="vector-header mw-header no-font-mode-scale"></header>,<div class="mw-page-container"></div>
    body > div#wmde-banner-app,body > div:eq(2) > header,body > div:eq(3)
    0.00284<div id="wmde-banner-app" data-v-app=""></div>,<header class="vector-header mw-header no-font-mode-scale"></header>,<div class="mw-page-container"></div>
    body > div#wmde-banner-app,body > div:eq(2) > header,body > div:eq(3)
    0.00280<div id="wmde-banner-app" data-v-app=""></div>,<header class="vector-header mw-header no-font-mode-scale"></header>,<div class="mw-page-container"></div>
    body > div#wmde-banner-app,body > div:eq(2) > header,body > div:eq(3)
    0.00235<div id="wmde-banner-app" data-v-app=""></div>,<header class="vector-header mw-header no-font-mode-scale"></header>,<div class="mw-page-container"></div>
    body > div#wmde-banner-app,body > div:eq(2) > header,body > div:eq(3)
    0.00234<div id="wmde-banner-app" data-v-app=""></div>,<header class="vector-header mw-header no-font-mode-scale"></header>,<div class="mw-page-container"></div>
    body > div#wmde-banner-app,body > div:eq(2) > header,body > div:eq(3)
    0.00229<div id="wmde-banner-app" data-v-app=""></div>,<header class="vector-header mw-header no-font-mode-scale"></header>,<div class="mw-page-container"></div>
    body > div#wmde-banner-app,body > div:eq(2) > header,body > div:eq(3)
    0.00222<div id="wmde-banner-app" data-v-app=""></div>,<header class="vector-header mw-header no-font-mode-scale"></header>,<div class="mw-page-container"></div>
    body > div#wmde-banner-app,body > div:eq(2) > header,body > div:eq(3)
    0.00196<div id="wmde-banner-app" data-v-app=""></div>,<header class="vector-header mw-header no-font-mode-scale"></header>,<div class="mw-page-container"></div>
    body > div#wmde-banner-app,body > div:eq(2) > header,body > div:eq(3)
    0.00188<div id="wmde-banner-app" data-v-app=""></div>,<header class="vector-header mw-header no-font-mode-scale"></header>,<div class="mw-page-container"></div>
    body > div#wmde-banner-app,body > div:eq(2) > header,body > div:eq(3)
    0.00188<div id="wmde-banner-app" data-v-app=""></div>,<header class="vector-header mw-header no-font-mode-scale"></header>,<div class="mw-page-container"></div>
    body > div#wmde-banner-app,body > div:eq(2) > header,body > div:eq(3)
    0.00163<div id="wmde-banner-app" data-v-app=""></div>,<header class="vector-header mw-header no-font-mode-scale"></header>,<div class="mw-page-container"></div>
    body > div#wmde-banner-app,body > div:eq(2) > header,body > div:eq(3)
    0.00055<div id="wmde-banner-app" data-v-app=""></div>
    body > div#wmde-banner-app
    Layout shift

    The elements that have shifted place is highlighted in the image (that have a higher value than 0.01). If the element shifted outside of the viewport, you will not see it there. It can be hard to understand what content that has shifted, if that's the case, checkout the video or the filmstrip of the run.

    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 928 ms.

    Event typepointerover
    Element typeA
    Element class namemw-redirect
    Event target#mw-content-text>div.mw-content-ltr.mw-parser-output>p>a.mw-redirect
    Load state when the event happenedloading

    Long Animation Frames

    Read more about the Long Animation Frames API here here.

    The top 10 longest animation frames entries

    Blocking duration Work durationRender durationPreLayout DurationStyle And Layout Duration
    360.4 ms840.9 ms2.9 ms2.8 ms0.1 ms
    No availible script information.
    Blocking duration Work durationRender durationPreLayout DurationStyle And Layout Duration
    357.6 ms400.5 ms7.1 ms5.7 ms1.4 ms
    https://en.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=vector-2022

    Forced Style And Layout Duration: 333 ms

    Invoker:  IdleRequestCallback
    Invoker Type: user-callback
    Source Function Name:  doPropagation
    Window attribution: self
    Source char position: 4314

    Blocking duration Work durationRender durationPreLayout DurationStyle And Layout Duration
    246.7 ms292.3 ms4.4 ms4.4 ms0 ms

    Forced Style And Layout Duration: 288 ms

    Invoker:  TimerHandler:setTimeout
    Invoker Type: user-callback
    Window attribution: self
    Source char position: 78937

    Blocking duration Work durationRender durationPreLayout DurationStyle And Layout Duration
    194.6 ms166.6 ms102 ms97.8 ms4.2 ms
    https://en.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=vector-2022

    Invoker:  IdleRequestCallback
    Invoker Type: user-callback
    Source Function Name:  doPropagation
    Window attribution: self
    Source char position: 4314

    https://en.wikipedia.org/w/load.php?lang=en&modules=ext.centralNotice.bannerHistoryLogger%2CchoiceData%2Cdisplay%2CgeoIP%2CimpressionDiet%2CkvStore%2ClargeBannerLimit%2ClegacySupport%2CstartUp%7Cext.centralauth.ForeignApi%2Ccentralautologin%7Cext.checkUser.clientHints%7Cext.cite.ux-enhancements%7Cext.cx.eventlogging.campaigns%7Cext.cx.model%7Cext.cx.uls.quick.actions%7Cext.echo.centralauth%7Cext.eventLogging%2CnavigationTiming%2Cpopups%2CwikimediaEvents%2CxLab%7Cext.eventLogging.metricsPlatform%7Cext.growthExperiments.SuggestedEditSession%7Cext.phonos.init%7Cext.scribunto.logs%7Cext.tmh.OgvJsSupport%2Cplayer%7Cext.uls.common%2Cinterface%2Cpreferences%2Cwebfonts%7Cext.urlShortener.toolbar%7Cext.wikimediaEvents.xLab%7Cjquery%2Coojs%2Csite%7Cjquery.client%2CmakeCollapsible%2CtextSelection%7Cjquery.uls.data%7Cmediawiki.ForeignApi%2CString%2CTitle%2Capi%2Cbase%2Ccldr%2Ccookie%2Cexperiments%2CjqueryMsg%2Clanguage%2Crouter%2Cstorage%2Ctoc%2Cuser%2Cutil%2CvisibleTimeout%7Cmediawiki.ForeignApi.core%7Cmediawiki.editfont.styles%7Cmediawiki.libs.pluralruleparser%7Cmediawiki.page.media%2Cready%7Cmediawiki.page.watch.ajax%7Cmmv.bootstrap%2Ccodex%7Cmw.cx.SiteMapper%7Cskins.vector.clientPreferences%2Cjs%7Cskins.vector.icons.js%7Cwikibase.client.vector-2022%7Cwikibase.databox.fromWikidata&skin=vector-2022&version=1bfa0

    Invoker:  TimerHandler:setTimeout
    Invoker Type: user-callback
    Window attribution: self
    Source char position: 353049

    https://en.wikipedia.org/w/load.php?lang=en&modules=ext.centralNotice.bannerHistoryLogger%2CchoiceData%2Cdisplay%2CgeoIP%2CimpressionDiet%2CkvStore%2ClargeBannerLimit%2ClegacySupport%2CstartUp%7Cext.centralauth.ForeignApi%2Ccentralautologin%7Cext.checkUser.clientHints%7Cext.cite.ux-enhancements%7Cext.cx.eventlogging.campaigns%7Cext.cx.model%7Cext.cx.uls.quick.actions%7Cext.echo.centralauth%7Cext.eventLogging%2CnavigationTiming%2Cpopups%2CwikimediaEvents%2CxLab%7Cext.eventLogging.metricsPlatform%7Cext.growthExperiments.SuggestedEditSession%7Cext.phonos.init%7Cext.scribunto.logs%7Cext.tmh.OgvJsSupport%2Cplayer%7Cext.uls.common%2Cinterface%2Cpreferences%2Cwebfonts%7Cext.urlShortener.toolbar%7Cext.wikimediaEvents.xLab%7Cjquery%2Coojs%2Csite%7Cjquery.client%2CmakeCollapsible%2CtextSelection%7Cjquery.uls.data%7Cmediawiki.ForeignApi%2CString%2CTitle%2Capi%2Cbase%2Ccldr%2Ccookie%2Cexperiments%2CjqueryMsg%2Clanguage%2Crouter%2Cstorage%2Ctoc%2Cuser%2Cutil%2CvisibleTimeout%7Cmediawiki.ForeignApi.core%7Cmediawiki.editfont.styles%7Cmediawiki.libs.pluralruleparser%7Cmediawiki.page.media%2Cready%7Cmediawiki.page.watch.ajax%7Cmmv.bootstrap%2Ccodex%7Cmw.cx.SiteMapper%7Cskins.vector.clientPreferences%2Cjs%7Cskins.vector.icons.js%7Cwikibase.client.vector-2022%7Cwikibase.databox.fromWikidata&skin=vector-2022&version=1bfa0

    Invoker:  TimerHandler:setTimeout
    Invoker Type: user-callback
    Window attribution: self
    Source char position: 353049

    https://en.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=vector-2022

    Forced Style And Layout Duration: 17 ms

    Invoker:  FrameRequestCallback
    Invoker Type: user-callback
    Source Function Name:  flushCssBuffer
    Window attribution: self
    Source char position: 3240

    Blocking duration Work durationRender durationPreLayout DurationStyle And Layout Duration
    104.5 ms116.3 ms58.3 ms58.1 ms0.2 ms
    https://en.wikipedia.org/w/load.php?lang=en&modules=ext.centralNotice.bannerHistoryLogger%2CchoiceData%2Cdisplay%2CgeoIP%2CimpressionDiet%2CkvStore%2ClargeBannerLimit%2ClegacySupport%2CstartUp%7Cext.centralauth.ForeignApi%2Ccentralautologin%7Cext.checkUser.clientHints%7Cext.cite.ux-enhancements%7Cext.cx.eventlogging.campaigns%7Cext.cx.model%7Cext.cx.uls.quick.actions%7Cext.echo.centralauth%7Cext.eventLogging%2CnavigationTiming%2Cpopups%2CwikimediaEvents%2CxLab%7Cext.eventLogging.metricsPlatform%7Cext.growthExperiments.SuggestedEditSession%7Cext.phonos.init%7Cext.scribunto.logs%7Cext.tmh.OgvJsSupport%2Cplayer%7Cext.uls.common%2Cinterface%2Cpreferences%2Cwebfonts%7Cext.urlShortener.toolbar%7Cext.wikimediaEvents.xLab%7Cjquery%2Coojs%2Csite%7Cjquery.client%2CmakeCollapsible%2CtextSelection%7Cjquery.uls.data%7Cmediawiki.ForeignApi%2CString%2CTitle%2Capi%2Cbase%2Ccldr%2Ccookie%2Cexperiments%2CjqueryMsg%2Clanguage%2Crouter%2Cstorage%2Ctoc%2Cuser%2Cutil%2CvisibleTimeout%7Cmediawiki.ForeignApi.core%7Cmediawiki.editfont.styles%7Cmediawiki.libs.pluralruleparser%7Cmediawiki.page.media%2Cready%7Cmediawiki.page.watch.ajax%7Cmmv.bootstrap%2Ccodex%7Cmw.cx.SiteMapper%7Cskins.vector.clientPreferences%2Cjs%7Cskins.vector.icons.js%7Cwikibase.client.vector-2022%7Cwikibase.databox.fromWikidata&skin=vector-2022&version=1bfa0

    Invoker:  TimerHandler:setTimeout
    Invoker Type: user-callback
    Window attribution: self
    Source char position: 353049

    Blocking duration Work durationRender durationPreLayout DurationStyle And Layout Duration
    83.3 ms24.9 ms118.2 ms97.2 ms21 ms
    https://en.wikipedia.org/w/load.php?lang=en&modules=ext.centralNotice.bannerHistoryLogger%2CchoiceData%2Cdisplay%2CgeoIP%2CimpressionDiet%2CkvStore%2ClargeBannerLimit%2ClegacySupport%2CstartUp%7Cext.centralauth.ForeignApi%2Ccentralautologin%7Cext.checkUser.clientHints%7Cext.cite.ux-enhancements%7Cext.cx.eventlogging.campaigns%7Cext.cx.model%7Cext.cx.uls.quick.actions%7Cext.echo.centralauth%7Cext.eventLogging%2CnavigationTiming%2Cpopups%2CwikimediaEvents%2CxLab%7Cext.eventLogging.metricsPlatform%7Cext.growthExperiments.SuggestedEditSession%7Cext.phonos.init%7Cext.scribunto.logs%7Cext.tmh.OgvJsSupport%2Cplayer%7Cext.uls.common%2Cinterface%2Cpreferences%2Cwebfonts%7Cext.urlShortener.toolbar%7Cext.wikimediaEvents.xLab%7Cjquery%2Coojs%2Csite%7Cjquery.client%2CmakeCollapsible%2CtextSelection%7Cjquery.uls.data%7Cmediawiki.ForeignApi%2CString%2CTitle%2Capi%2Cbase%2Ccldr%2Ccookie%2Cexperiments%2CjqueryMsg%2Clanguage%2Crouter%2Cstorage%2Ctoc%2Cuser%2Cutil%2CvisibleTimeout%7Cmediawiki.ForeignApi.core%7Cmediawiki.editfont.styles%7Cmediawiki.libs.pluralruleparser%7Cmediawiki.page.media%2Cready%7Cmediawiki.page.watch.ajax%7Cmmv.bootstrap%2Ccodex%7Cmw.cx.SiteMapper%7Cskins.vector.clientPreferences%2Cjs%7Cskins.vector.icons.js%7Cwikibase.client.vector-2022%7Cwikibase.databox.fromWikidata&skin=vector-2022&version=1bfa0

    Invoker:  TimerHandler:setTimeout
    Invoker Type: user-callback
    Window attribution: self
    Source char position: 353049

    Blocking duration Work durationRender durationPreLayout DurationStyle And Layout Duration
    12.2 ms42.2 ms20.2 ms10.6 ms9.6 ms
    https://en.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=vector-2022

    Invoker:  IdleRequestCallback
    Invoker Type: user-callback
    Source Function Name:  doPropagation
    Window attribution: self
    Source char position: 4314

    https://en.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=vector-2022

    Invoker:  FrameRequestCallback
    Invoker Type: user-callback
    Source Function Name:  flushCssBuffer
    Window attribution: self
    Source char position: 3240

    Server timings

    namedurationdescription
    cache0hit-front
    host0cp3070

    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)11.900 s 1146 669 250 312
    <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="250" height="312" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/8d/President_Barack_Obama.jpg/500px-President_Barack_Obama.jpg 1.5x" data-file-width="2687" data-file-height="3356">
    Heading11.900 s 478 445 789 40
    <h1 id="firstHeading" class="firstHeading mw-first-heading"></h1>
    LargestContentfulPaint11.900 s 478 774 948 286
    <p></p>
    | Summary  | Largest responses  | Requests and sizes per content type  | Data per domain | Expires and last modified statistics  | Requests loaded after onLoad event  | Render blocking requests  | 

    PageXray

    How the page is built.

    Summary
    HTTP versionHTTP/2.0
    Total requests102
    Total domains4
    Total transfer size1.5 MB
    Total content size4.1 MB
    Responses missing compression16
    Number of cookies74
    Third party cookies0
    Requests per response code
    200100
    2041
    3021

    Largest assets on the page (by transfer size)

    URLTypeTransfer SizeContent Size
    https://en.wikipedia...wiki/Barack_Obamahtml303.9 KB1.7 MB
    https://en.wikipedia...ia.org/w/load.phpjavascript211.5 KB846.2 KB
    https://en.wikipedia...ia.org/w/load.phpjavascript57.8 KB156.2 KB
    https://meta.wikimed...a.org/w/index.phpjavascript56.6 KB220.3 KB
    https://upload.wikim...llege2008.svg.pngimage37.0 KB35.9 KB
    https://upload.wikim...Premium_Chart.jpgimage30.3 KB29.2 KB
    https://upload.wikim...resident_-_v1.pngimage29.8 KB28.6 KB
    https://upload.wikim..._Barack_Obama.jpgimage26.8 KB25.7 KB
    https://upload.wikim...y_bill_cramer.jpgimage26.0 KB24.9 KB
    https://en.wikipedia...ia.org/w/load.phpjavascript24.7 KB116.8 KB
    https://en.wikipedia...ia.org/w/load.phpcss24.1 KB185.0 KB
    https://upload.wikim..._2016_%289%29.jpgimage24.0 KB22.8 KB
    https://upload.wikim...school_record.jpgimage23.5 KB22.4 KB
    https://upload.wikim...llege2012.svg.pngimage22.2 KB21.1 KB
    https://upload.wikim...5471954323%29.jpgimage21.4 KB20.2 KB
    https://en.wikipedia...ia.org/w/load.phpjavascript21.2 KB63.6 KB
    https://upload.wikim..._and_children.jpgimage20.1 KB19.0 KB
    https://upload.wikim...cial_portrait.jpgimage19.9 KB18.7 KB
    https://upload.wikim...ed_States.svg.pngimage19.6 KB18.5 KB
    https://upload.wikim...2067439422%29.jpgimage19.6 KB18.4 KB

    Requests and sizes per content type

    ContentHeader SizeTransfer SizeContent SizeRequests
    html0 b303.9 KB1.7 MB1
    css0 b27.2 KB191.7 KB2
    javascript0 b401.5 KB1.5 MB9
    image0 b741.3 KB669.9 KB64
    svg0 b30.2 KB23.9 KB21
    favicon0 b1.8 KB2.7 KB1
    plain0 b611 B0 b1
    json0 b4.7 KB5.8 KB2
    Total0 b1.5 MB4.1 MB101

    Data per domain

    DomainTotal download timeTransfer SizeContent SizeRequests
    en.wikipedia.org6.704 s721.2 KB3.2 MB34
    upload.wikimedia.org48.964 s732.0 KB659.8 KB66
    meta.wikimedia.org151 ms56.6 KB220.3 KB1
    auth.wikimedia.org192 ms1.4 KB254 B1

    Expires and last modified statistics

    typeminmedianmax
    Expires0 seconds0 seconds1 year
    Last modified27 minutes29 weeks12 years

    Requests loaded after onLoad event

    Included requests done after load event end.

    ContentTransfer SizeRequests
    html0 b0
    css0 b0
    javascript143.3 KB5
    image0 b0
    font0 b0
    svg11.3 KB10
    favicon1.8 KB1
    plain611 B1
    json4.7 KB2
    Total161.6 KB20

    Requests loaded after onContentLoad

    Includes requests done after DOM content loaded.

    ContentTransfer SizeRequests
    html0 b0
    css0 b0
    javascript380.2 KB8
    image0 b0
    font0 b0
    svg11.3 KB10
    favicon1.8 KB1
    plain611 B1
    json4.7 KB2
    Total398.6 KB23

    Render blocking requests

    Render blocking information directly from Chrome.

    BlockingIn body parser blockingPotentially blocking
    201

    Render information

    URLType
    https://en.wikipedia...ia.org/w/load.phpnon_blocking
    https://en.wikipedia...ia.org/w/load.phpnon_blocking
    https://meta.wikimed...a.org/w/index.phpnon_blocking
    https://en.wikipedia...ia.org/w/load.phpnon_blocking
    https://en.wikipedia...ia.org/w/load.phpblocking
    https://en.wikipedia...ia.org/w/load.phppotentially_blocking
    https://en.wikipedia...ia.org/w/load.phpnon_blocking
    https://en.wikipedia...ia.org/w/load.phpnon_blocking
    https://en.wikipedia...ia.org/w/load.phpblocking
    https://en.wikipedia...ia.org/w/load.phpnon_blocking
    https://auth.wikimed...gin/checkLoggedInnon_blocking
    https://en.wikipedia...alAutoLogin/startnon_blocking
    CPU Long Tasks | CPU Time Spent | CPU Time Spent Per Request | 

    CPU

    Download the Chrome trace log and drag and drop it into Developer Tools / Performance in Chrome.

    Download trace log

    Long Tasks

    Collected using the Long Task API. A long task is a task that take 50 milliseconds or more.

    TypeQuantityTotal duration (ms)
    Total Blocking Time 868
    Max Potential First Input Delay 400
    Long Tasks before First Paint1438
    Long Tasks before First Contentful Paint1438
    Long Tasks before Largest Contentful Paint1438
    Long Tasks after Load Event End71218
    Total Long Tasks81656

    CPU last long task happened at 10.579 s

    Individual Long Tasks

    namestartTimedurationcontainerIdcontainerNamecontainerSrccontainerType
    unknown933438window
    self2305142window
    self2447106window
    self256396window
    unknown267061window
    self2813121window
    self2969400window
    self10579292window

    CPU time spent

    Calculated using Tracium.

    Categories (ms)
    parseHTML108
    styleLayout1531
    paintCompositeRender282
    scriptParseCompile6
    scriptEvaluation509
    garbageCollection14
    other1196
    Events (ms)
    UpdateLayoutTree1010
    PrePaint657
    Layout518
    FunctionCall434
    RunTask351
    Paint188
    ParseHTML104
    Layerize93
    HitTest48
    PaintImage37
    RunMicrotasks26
    V8.HandleInterrupts22
    DocumentLoader::BodyLoadingFinished19
    IntersectionObserverController::computeIntersections19
    Commit18
    v8.run14
    CpuProfiler::StartProfiling11

    Time spent per request

    URLCPU time (ms)
    https://en.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=vector-2022540
    https://en.wikipedia.org/w/load.php?lang=en&modules=ext.centralNotice.bannerHistoryLogger%2CchoiceData%2Cdisplay%2CgeoIP%2CimpressionDiet%2CkvStore%2ClargeBannerLimit%2ClegacySupport%2CstartUp%7Cext.centralauth.ForeignApi%2Ccentralautologin%7Cext.checkUser.clientHints%7Cext.cite.ux-enhancements%7Cext.cx.eventlogging.campaigns%7Cext.cx.model%7Cext.cx.uls.quick.actions%7Cext.echo.centralauth%7Cext.eventLogging%2CnavigationTiming%2Cpopups%2CwikimediaEvents%2CxLab%7Cext.eventLogging.metricsPlatform%7Cext.growthExperiments.SuggestedEditSession%7Cext.phonos.init%7Cext.scribunto.logs%7Cext.tmh.OgvJsSupport%2Cplayer%7Cext.uls.common%2Cinterface%2Cpreferences%2Cwebfonts%7Cext.urlShortener.toolbar%7Cext.wikimediaEvents.xLab%7Cjquery%2Coojs%2Csite%7Cjquery.client%2CmakeCollapsible%2CtextSelection%7Cjquery.uls.data%7Cmediawiki.ForeignApi%2CString%2CTitle%2Capi%2Cbase%2Ccldr%2Ccookie%2Cexperiments%2CjqueryMsg%2Clanguage%2Crouter%2Cstorage%2Ctoc%2Cuser%2Cutil%2CvisibleTimeout%7Cmediawiki.ForeignApi.core%7Cmediawiki.editfont.styles%7Cmediawiki.libs.pluralruleparser%7Cmediawiki.page.media%2Cready%7Cmediawiki.page.watch.ajax%7Cmmv.bootstrap%2Ccodex%7Cmw.cx.SiteMapper%7Cskins.vector.clientPreferences%2Cjs%7Cskins.vector.icons.js%7Cwikibase.client.vector-2022%7Cwikibase.databox.fromWikidata&skin=vector-2022&version=1bfa0307
    https://meta.wikimedia.org/w/index.php?title=Special:BannerLoader&campaign=WMDE_FR_2025_Desktop_EN_05&banner=WMDE_FR_2025_Desktop_EN_05_ctrl&uselang=en&debug=false16