Run 6 summary

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

Tested 2025-12-07 15:16:17 using Chrome 142.0.7444.59 (script).(runtime settings).

Test visiting multiple pages

First hit the Main_Page with an empty browser cache and then visit Obama

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SummaryWaterfall MetricsVideoFilmstrip CoachPageXrayCPU Screenshots

Summary

MetricValue
Page metrics
Performance score73
Total page size1.2 MB
Requests82
Timing metrics
TTFB119 ms
First Paint1.000 s
Fully Loaded10.309 s
Google Web Vitals
TTFB119 ms
First Contentful Paint (FCP) 1.000 s
Largest Contentful Paint (LCP) 1.000 s
Cumulative Layout Shift (CLS) 0.16
872 ms
Total Blocking Time744 ms
Max Potential FID363 ms
CPU metrics
CPU long tasks9
CPU last long task happens at9.286 s
Visual Metrics
First Visual Change967 ms
Speed Index2.803 s
Visual Complete 85%10.667 s
Visual Complete 99%12.533 s
Last Visual Change13.567 s
Screenshot
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Waterfall

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Video

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| Filmstrip | 

Filmstrip

Use--filmstrip.showAll to show all filmstrips.

0 s
0.2 smwStartup 138 ms
0.5 sCPU Long Task duration 400 msDOM Content Loaded Time 428 ms
0.9 sCPU Long Task duration 79 ms
1 sFirst Visual Change 967 msFirst Contentful Paint 1.000 sLCP <P> 1.000 s
1.1 s
1.2 sCPU Long Task duration 103 ms
1.3 sCPU Long Task duration 54 ms
1.4 sCPU Long Task duration 57 msCPU Long Task duration 86 ms
1.5 s
1.6 sCPU Long Task duration 83 ms
1.7 smwCentralNoticeBanner 1.680 s
1.8 sCPU Long Task duration 363 ms
1.9 s
2.1 sPage Load Time 2.088 s
9.3 sCPU Long Task duration 348 ms
9.4 s
9.6 s
9.7 sLayout Shift 0.00184 9.683 s
9.8 sLayout Shift 0.00266 9.741 sLayout Shift 0.00177 9.771 sLayout Shift 0.00353 9.792 s
9.9 sLayout Shift 0.00222 9.814 sLayout Shift 0.00497 9.837 sLayout Shift 0.00312 9.859 sLayout Shift 0.00357 9.878 s
10 sLayout Shift 0.00832 9.902 sLayout Shift 0.00539 9.922 sLayout Shift 0.00594 9.943 sLayout Shift 0.00685 9.971 sLayout Shift 0.01636 9.991 s
10.1 sLayout Shift 0.01757 10.023 sLayout Shift 0.00827 10.051 sLayout Shift 0.01357 10.075 s
10.2 sLayout Shift 0.00559 10.101 sLayout Shift 0.00931 10.119 sLayout Shift 0.00419 10.144 sLayout Shift 0.00349 10.160 sLayout Shift 0.00607 10.190 s
10.3 sLayout Shift 0.00280 10.209 sLayout Shift 0.00235 10.230 sLayout Shift 0.00411 10.254 sLayout Shift 0.00188 10.276 sLayout Shift 0.00188 10.292 s
10.4 sFully Loaded 10.309 sLayout Shift 0.00152 10.317 sLayout Shift 0.00282 10.340 sLayout Shift 0.00235 10.394 s
10.5 sLayout Shift 0.00163 10.442 s
10.6 s
10.7 sVisual Complete 85% 10.667 sLargest Image 10.667 sHeading 10.667 s
10.8 s
10.9 s
11 s
11.1 s
11.2 s
11.3 s
11.4 s
11.5 s
11.6 sVisual Complete 95% 11.567 s
11.7 s
11.8 s
11.9 s
12 s
12.1 s
12.2 s
12.3 s
12.4 s
12.5 s
12.6 sVisual Complete 99% 12.533 s
12.7 s
12.8 s
12.9 s
13 s
13.1 s
13.2 s
13.3 s
13.4 s
13.5 s
13.6 sLast Visual Change 13.567 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 (73)

TitleAdviceScore
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 9 CPU long tasks with the total of 1.573 s. The total blocking time is 744 ms and 2 long tasks before first contentful paint with total time of 479 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:
  • self
  • unknown
  • self
  • unknown
  • self
  • self
  • unknown
  • self
  • self
    • Avoid extra requests by setting cache headers (cacheHeaders)The page has 62 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 831.4 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/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/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/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/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://meta.wikimedia.org/w/index.php...a.org/w/index.php
    • 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/api/rest_v1/page/summary/Columbia_University
  • https://en.wikipedia.org/api/rest_v1/page/summary/Barack_(disambiguation)
    • Total image size shouldn't be too big (imageSize)The page total image size is 710.8 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 127.4 kB and the uncompressed size is 452 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...ia.org/w/load.php 67.9 KB221.1 KB
    https://meta.wikimedia.org/w/index.php...a.org/w/index.php 56.5 KB220.3 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 24.5 kB (24490) 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 23.9 KB185.0 KB
    Don't use private headers on static content (privateAssets)The page has 2 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.90
    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://meta.wikimedia.org/w/index.php...a.org/w/index.php

    • Best practice advice (80)

    TitleAdviceScore
    Cumulative Layout Shift (cumulativeLayoutShift)You have a cumulative layout shift score (0.1559) 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.
    Avoid use too many response headers (manyHeaders)https://en.wikipedia...lumbia_University has 31 headers.https://en.wikipedia..._(disambiguation) 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/Barack_(disambiguation)
    • Avoid unnecessary headers (unnecessaryHeaders)There are 13 responses that sets both a max-age and expires header. There are 82 responses that sets a server header. 5
    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...ia.org/w/load.php
  • https://en.wikipedia.org/w/load.php...ia.org/w/load.php
  • 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/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/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/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://en.wikipedia.org/w/skins/Vector/resources/skins.vector.styles/images/arr...n-progressive.svg
  • https://en.wikipedia.org/w/skins/Vector/resources/skins.vector.styles/images/lin...r-progressive.svg
  • https://en.wikipedia.org/w/resources/src/mediawiki.skinning/images/magnify-clip-ltr.svg?8330e
  • 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://en.wikipedia.org/w/load.php...ia.org/w/load.php
  • https://en.wikipedia.org/w/load.php...ia.org/w/load.php
  • https://upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg
  • https://meta.wikimedia.org/w/index.php...a.org/w/index.php
  • 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...ia.org/w/load.php
  • 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...ia.org/w/load.php
  • 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...ia.org/w/load.php
  • 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...ia.org/w/load.php
  • 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...ia.org/w/load.php
  • 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...ia.org/w/load.php
  • 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/beacon/impression...beacon/impression
  • https://en.wikipedia.org/api/rest_v1/page/summary/Columbia_University
  • https://en.wikipedia.org/api/rest_v1/page/summary/Barack_(disambiguation)

    • 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 | Metrics from CDP | Server timings | 

    Visual Metrics

    Visual Metrics
    First Visual Change967 ms
    Speed Index2.803 s
    Largest Image10.667 s
    Heading10.667 s
    LargestContentfulPaint10.667 s
    Last Meaningful Paint10.667 s
    Largest Contentful Paint10.667 s
    Visual Complete 85%10.667 s
    Visual Complete 95%11.567 s
    Visual Complete 99%12.533 s
    Last Visual Change13.567 s
    Visual Readiness12.600 s

    Browser Metrics

    Navigation Timing
    backEndTime119 ms
    domContentLoadedTime428 ms
    domInteractiveTime428 ms
    domainLookupTime0 ms
    frontEndTime1.695 s
    pageDownloadTime274 ms
    pageLoadTime2.088 s
    redirectionTime0 ms
    serverConnectionTime0 ms
    serverResponseTime387 ms
    Google Web Vitals
    Time to first byte (TTFB)119 ms
    First Contentful Paint (FCP)1.000 s
    Largest Contentful Paint (LCP)1.000 s
    Cumulative Layout Shift (CLS)0.16
    Interaction to next paint (INP)872 ms
    Total Blocking Time (TBT)744 ms
    First Contentful Paint info
    Elements that needed recalculate style before FCP15878
    Time spent in recalculate style before FCP238.475 ms
    Extra timings
    TTFB119 ms
    First Paint1.000 s
    Load Event End2.088 s
    Fully loaded10.309 s
    User Timing marks
    mwStartup138 ms
    mwCentralNoticeBanner1.680 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 1.000 s
    Element render delay881 ms
    TTFB119 ms
    Resource delay0 ms
    Resource load duration0 ms
    Elements that needed recalculate style before LCP15878
    Time spent in recalculate style before LCP238.475 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

    0.15593 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
    0.01757<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)
    0.01636<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)
    0.01357<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)
    0.00931<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)
    0.00832<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)
    0.00685<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)
    0.00607<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)
    0.00594<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)
    0.00559<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)
    0.00539<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)
    0.00497<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)
    0.00419<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)
    0.00411<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)
    0.00357<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)
    0.00349<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)
    0.00312<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)
    0.00282<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)
    0.00266<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)
    0.00235<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)
    0.00222<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)
    0.00188<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)
    0.00184<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)
    0.00177<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)
    0.00152<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)
    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 872 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
    353.5 ms741.7 ms3.4 ms3.2 ms0.2 ms
    https://en.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=vector-2022

    Invoker:  https://en.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=vector-2022
    Invoker Type: classic-script
    Window attribution: self

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

    Invoker:  IdleRequestCallback
    Invoker Type: user-callback
    Window attribution: self
    Source char position: 14415

    Blocking duration Work durationRender durationPreLayout DurationStyle And Layout Duration
    320.7 ms368.3 ms7.4 ms5.9 ms1.5 ms
    https://en.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=vector-2022

    Forced Style And Layout Duration: 318 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
    303 ms348.4 ms4.6 ms4.6 ms0 ms

    Forced Style And Layout Duration: 344 ms

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

    Blocking duration Work durationRender durationPreLayout DurationStyle And Layout Duration
    104.8 ms124.6 ms50.9 ms50.9 ms0 ms
    https://en.wikipedia.org/w/load.php?lang=en&modules=ext.cite.ux-enhancements%7Cext.cx.model%7Cext.cx.uls.quick.actions%7Cext.phonos.init%7Cext.scribunto.logs%7Cext.tmh.OgvJsSupport%2Cplayer%7Cext.uls.common%7Cjquery%7Cjquery.makeCollapsible%7Cjquery.uls.data%7Cmediawiki.page.media%7Cmediawiki.toc%7Cmw.cx.SiteMapper&skin=vector-2022&version=938yb

    Invoker:  TimerHandler:setTimeout
    Invoker Type: user-callback
    Window attribution: self
    Source char position: 68390

    https://en.wikipedia.org/w/load.php?lang=en&modules=ext.cite.ux-enhancements%7Cext.cx.model%7Cext.cx.uls.quick.actions%7Cext.phonos.init%7Cext.scribunto.logs%7Cext.tmh.OgvJsSupport%2Cplayer%7Cext.uls.common%7Cjquery%7Cjquery.makeCollapsible%7Cjquery.uls.data%7Cmediawiki.page.media%7Cmediawiki.toc%7Cmw.cx.SiteMapper&skin=vector-2022&version=938yb

    Invoker:  TimerHandler:setTimeout
    Invoker Type: user-callback
    Window attribution: self
    Source char position: 68390

    Blocking duration Work durationRender durationPreLayout DurationStyle And Layout Duration
    89.4 ms92.3 ms82.4 ms73 ms9.4 ms
    https://en.wikipedia.org/w/load.php?lang=en&modules=skins.vector.js&skin=vector-2022&version=16ylr

    Forced Style And Layout Duration: 5 ms

    Invoker:  IntersectionObserverCallback
    Invoker Type: user-callback
    Window attribution: self
    Source char position: 32579

    https://en.wikipedia.org/w/load.php?lang=en&modules=ext.cite.ux-enhancements%7Cext.cx.model%7Cext.cx.uls.quick.actions%7Cext.phonos.init%7Cext.scribunto.logs%7Cext.tmh.OgvJsSupport%2Cplayer%7Cext.uls.common%7Cjquery%7Cjquery.makeCollapsible%7Cjquery.uls.data%7Cmediawiki.page.media%7Cmediawiki.toc%7Cmw.cx.SiteMapper&skin=vector-2022&version=938yb

    Invoker:  TimerHandler:setTimeout
    Invoker Type: user-callback
    Window attribution: self
    Source char position: 68390

    Blocking duration Work durationRender durationPreLayout DurationStyle And Layout Duration
    31.9 ms53.6 ms36 ms25.7 ms10.3 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

    Blocking duration Work durationRender durationPreLayout DurationStyle And Layout Duration
    5.1 ms28.1 ms45.2 ms41.1 ms4.1 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.cite.ux-enhancements%7Cext.cx.model%7Cext.cx.uls.quick.actions%7Cext.phonos.init%7Cext.scribunto.logs%7Cext.tmh.OgvJsSupport%2Cplayer%7Cext.uls.common%7Cjquery%7Cjquery.makeCollapsible%7Cjquery.uls.data%7Cmediawiki.page.media%7Cmediawiki.toc%7Cmw.cx.SiteMapper&skin=vector-2022&version=938yb

    Invoker:  TimerHandler:setTimeout
    Invoker Type: user-callback
    Window attribution: self
    Source char position: 68390

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

    Forced Style And Layout Duration: 14 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
    0 ms104.7 ms6.5 ms6.5 ms0 ms
    No availible script information.

    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.

    CDP Performance

    namevalue
    AudioHandlers0
    AudioWorkletProcessors0
    Documents31
    Frames29
    JSEventListeners2421
    LayoutObjects27996
    MediaKeySessions0
    MediaKeys0
    Nodes50486
    Resources124
    ContextLifecycleStateObservers60
    V8PerContextDatas2
    WorkerGlobalScopes0
    UACSSResources3
    RTCPeerConnections0
    ResourceFetchers31
    AdSubframes0
    DetachedScriptStates0
    ArrayBufferContents3
    LayoutCount211
    RecalcStyleCount228
    LayoutDuration442
    RecalcStyleDuration1075
    DevToolsCommandDuration119
    ScriptDuration419
    V8CompileDuration5
    TaskDuration3500
    TaskOtherDuration1440
    ThreadTime4
    ProcessTime10
    JSHeapUsedSize12784080
    JSHeapTotalSize16396288
    FirstMeaningfulPaint999

    Visual Elements

    NameDisplay TimeX YWidthHeight
    LargestImage (250px-President_Barack_Obama.jpg)10.667 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">
    Heading10.667 s 478 445 789 40
    <h1 id="firstHeading" class="firstHeading mw-first-heading"></h1>
    LargestContentfulPaint10.667 s 478 774 948 286
    <p></p>
    | Summary  | Largest responses  | Requests and sizes per content type  | Data per domain | Expires and last modified statistics  | Console log  | Requests loaded after onLoad event  | Render blocking requests  | 

    PageXray

    How the page is built.

    Summary
    HTTP versionHTTP/2.0
    Total requests82
    Total domains3
    Total transfer size1.2 MB
    Total content size3.0 MB
    Responses missing compression6
    Number of cookies59
    Third party cookies0
    Requests per response code
    20081
    2041

    Largest assets on the page (by transfer size)

    URLTypeTransfer SizeContent Size
    https://en.wikipedia...wiki/Barack_Obamahtml303.4 KB1.7 MB
    https://en.wikipedia...ia.org/w/load.phpjavascript67.9 KB221.1 KB
    https://meta.wikimed...a.org/w/index.phpjavascript56.5 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://upload.wikim...tatistics.svg.pngimage24.6 KB23.5 KB
    https://upload.wikim..._2016_%289%29.jpgimage24.0 KB22.8 KB
    https://en.wikipedia...ia.org/w/load.phpcss23.9 KB185.0 KB
    https://upload.wikim...school_record.jpgimage23.5 KB22.4 KB
    https://upload.wikim...es_Senate.svg.pngimage23.2 KB22.1 KB
    https://upload.wikim...5471954323%29.jpgimage23.0 KB21.9 KB
    https://upload.wikim...llege2012.svg.pngimage22.2 KB21.1 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...amiltondavis1.jpgimage19.6 KB18.5 KB
    https://upload.wikim...2067439422%29.jpgimage19.6 KB18.4 KB

    Requests and sizes per content type

    ContentHeader SizeTransfer SizeContent SizeRequests
    html0 b303.4 KB1.7 MB1
    css0 b23.9 KB185.0 KB1
    javascript0 b124.4 KB441.4 KB2
    image0 b751.2 KB686.4 KB58
    svg0 b19.7 KB7.7 KB17
    plain0 b611 B0 b1
    json0 b4.2 KB3.7 KB2
    Total0 b1.2 MB3.0 MB82

    Data per domain

    DomainTotal download timeTransfer SizeContent SizeRequests
    en.wikipedia.org3.529 s415.5 KB2.1 MB20
    upload.wikimedia.org58.871 s755.4 KB689.4 KB61
    meta.wikimedia.org156 ms56.5 KB220.3 KB1

    Expires and last modified statistics

    typeminmedianmax
    Expires0 seconds0 seconds1 year
    Last modified27 minutes31 weeks12 years

    Console log

    The page logs the following messages to the console.

    LevelMessage
    INFO https://en.wikipedia.org/w/load.php?lang=en&modules=ext.centralNotice.bannerHistoryLogger%2CchoiceData%2Cdisplay%2CgeoIP%2CimpressionDiet%2CkvStore%2ClargeBannerLimit%2ClegacySupport%2CstartUp%7Cext.centralauth.centralautologin%7Cext.checkUser.clientHints%7Cext.cx.eventlogging.campaigns%7Cext.echo.centralauth%7Cext.eventLogging%2CnavigationTiming%2Cpopups%2CwikimediaEvents%2CxLab%7Cext.eventLogging.metricsPlatform%7Cext.growthExperiments.SuggestedEditSession%7Cext.uls.interface%2Cpreferences%2Cwebfonts%7Cext.urlShortener.toolbar%7Cext.wikimediaEvents.xLab%7Cjquery%2Coojs%2Csite%7Cjquery.client%2CtextSelection%7Cmediawiki.String%2CTitle%2Capi%2Cbase%2Ccldr%2Ccookie%2Cexperiments%2CjqueryMsg%2Clanguage%2Crouter%2Cstorage%2Cuser%2Cutil%2CvisibleTimeout%7Cmediawiki.editfont.styles%7Cmediawiki.libs.pluralruleparser%7Cmediawiki.page.ready%7Cmediawiki.page.watch.ajax%7Cmmv.bootstrap%2Ccodex%7Cskins.vector.clientPreferences%2Cjs%7Cskins.vector.icons.js%7Cwikibase.client.vector-2022%7Cwikibase.databox.fromWikidata&skin=vector-2022&version=s3khw 206:971 "mw.xLab.getExperiment(): The \"xlab-mw-module-loaded-v2\" experiment isn't registered. Is the experiment configured and running?"
    INFO https://en.wikipedia.org/w/load.php?lang=en&modules=ext.centralNotice.bannerHistoryLogger%2CchoiceData%2Cdisplay%2CgeoIP%2CimpressionDiet%2CkvStore%2ClargeBannerLimit%2ClegacySupport%2CstartUp%7Cext.centralauth.centralautologin%7Cext.checkUser.clientHints%7Cext.cx.eventlogging.campaigns%7Cext.echo.centralauth%7Cext.eventLogging%2CnavigationTiming%2Cpopups%2CwikimediaEvents%2CxLab%7Cext.eventLogging.metricsPlatform%7Cext.growthExperiments.SuggestedEditSession%7Cext.uls.interface%2Cpreferences%2Cwebfonts%7Cext.urlShortener.toolbar%7Cext.wikimediaEvents.xLab%7Cjquery%2Coojs%2Csite%7Cjquery.client%2CtextSelection%7Cmediawiki.String%2CTitle%2Capi%2Cbase%2Ccldr%2Ccookie%2Cexperiments%2CjqueryMsg%2Clanguage%2Crouter%2Cstorage%2Cuser%2Cutil%2CvisibleTimeout%7Cmediawiki.editfont.styles%7Cmediawiki.libs.pluralruleparser%7Cmediawiki.page.ready%7Cmediawiki.page.watch.ajax%7Cmmv.bootstrap%2Ccodex%7Cskins.vector.clientPreferences%2Cjs%7Cskins.vector.icons.js%7Cwikibase.client.vector-2022%7Cwikibase.databox.fromWikidata&skin=vector-2022&version=s3khw 206:971 "mw.xLab.getExperiment(): The \"logged-out-retention-round2\" experiment isn't registered. Is the experiment configured and running?"
    INFO https://en.wikipedia.org/w/load.php?lang=en&modules=ext.centralNotice.bannerHistoryLogger%2CchoiceData%2Cdisplay%2CgeoIP%2CimpressionDiet%2CkvStore%2ClargeBannerLimit%2ClegacySupport%2CstartUp%7Cext.centralauth.centralautologin%7Cext.checkUser.clientHints%7Cext.cx.eventlogging.campaigns%7Cext.echo.centralauth%7Cext.eventLogging%2CnavigationTiming%2Cpopups%2CwikimediaEvents%2CxLab%7Cext.eventLogging.metricsPlatform%7Cext.growthExperiments.SuggestedEditSession%7Cext.uls.interface%2Cpreferences%2Cwebfonts%7Cext.urlShortener.toolbar%7Cext.wikimediaEvents.xLab%7Cjquery%2Coojs%2Csite%7Cjquery.client%2CtextSelection%7Cmediawiki.String%2CTitle%2Capi%2Cbase%2Ccldr%2Ccookie%2Cexperiments%2CjqueryMsg%2Clanguage%2Crouter%2Cstorage%2Cuser%2Cutil%2CvisibleTimeout%7Cmediawiki.editfont.styles%7Cmediawiki.libs.pluralruleparser%7Cmediawiki.page.ready%7Cmediawiki.page.watch.ajax%7Cmmv.bootstrap%2Ccodex%7Cskins.vector.clientPreferences%2Cjs%7Cskins.vector.icons.js%7Cwikibase.client.vector-2022%7Cwikibase.databox.fromWikidata&skin=vector-2022&version=s3khw 206:971 "mw.xLab.getExperiment(): The \"sticky-headers\" experiment isn't registered. Is the experiment configured and running?"
    INFO https://en.wikipedia.org/w/load.php?lang=en&modules=ext.xLab&skin=vector-2022&version=1idqn 0:971 "mw.xLab.getExperiment(): The \"xlab-mw-module-loaded-v2\" experiment isn't registered. Is the experiment configured and running?"
    INFO https://en.wikipedia.org/w/load.php?lang=en&modules=ext.xLab&skin=vector-2022&version=1idqn 0:971 "mw.xLab.getExperiment(): The \"logged-out-retention-round2\" experiment isn't registered. Is the experiment configured and running?"
    INFO https://en.wikipedia.org/w/load.php?lang=en&modules=ext.xLab&skin=vector-2022&version=1idqn 0:971 "mw.xLab.getExperiment(): The \"sticky-headers\" experiment isn't registered. Is the experiment configured and running?"

    Requests loaded after onLoad event

    Included requests done after load event end.

    ContentTransfer SizeRequests
    html0 b0
    css0 b0
    javascript0 b0
    image0 b0
    font0 b0
    json4.2 KB2
    Total4.2 KB2

    Requests loaded after onContentLoad

    Includes requests done after DOM content loaded.

    ContentTransfer SizeRequests
    html0 b0
    css0 b0
    javascript56.5 KB1
    image1.2 KB1
    font0 b0
    svg19.7 KB17
    plain611 B1
    json4.2 KB2
    Total82.2 KB22

    Render blocking requests

    Render blocking information directly from Chrome.

    BlockingIn body parser blockingPotentially blocking
    100

    Render information

    URLType
    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.phpblocking
    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 744
    Max Potential First Input Delay 363
    Long Tasks before First Paint2479
    Long Tasks before First Contentful Paint2479
    Long Tasks before Largest Contentful Paint2479
    Long Tasks after Load Event End1348
    Total Long Tasks91573

    CPU last long task happened at 9.286 s

    Individual Long Tasks

    namestartTimedurationcontainerIdcontainerNamecontainerSrccontainerType
    self422400window
    unknown84179window
    self1139103window
    unknown124854window
    self133357window
    self139586window
    unknown150383window
    self1707363window
    self9286348window

    CPU time spent

    Calculated using Tracium.

    Categories (ms)
    parseHTML92
    styleLayout1520
    paintCompositeRender253
    scriptParseCompile5
    scriptEvaluation428
    garbageCollection21
    other1218
    Events (ms)
    UpdateLayoutTree1076
    PrePaint592
    Layout436
    FunctionCall363
    RunTask328
    Paint163
    CpuProfiler::StartProfiling129
    ParseHTML90
    Layerize86
    HitTest44
    PaintImage37
    RunMicrotasks24
    DocumentLoader::BodyLoadingFinished21
    Commit16
    V8.HandleInterrupts15
    IntersectionObserverController::computeIntersections13
    V8.GC_MC_INCREMENTAL_EMBEDDER_TRACING11
    v8.run10

    Time spent per request

    URLCPU time (ms)
    https://en.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=vector-2022446
    https://en.wikipedia.org/w/load.php?lang=en&modules=ext.cite.ux-enhancements%7Cext.cx.model%7Cext.cx.uls.quick.actions%7Cext.phonos.init%7Cext.scribunto.logs%7Cext.tmh.OgvJsSupport%2Cplayer%7Cext.uls.common%7Cjquery%7Cjquery.makeCollapsible%7Cjquery.uls.data%7Cmediawiki.page.media%7Cmediawiki.toc%7Cmw.cx.SiteMapper&skin=vector-2022&version=938yb217
    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
    | afterPageCompleteCheck.jpg | layoutShift.jpg | largestContentfulPaint.jpg | 

    Screenshots

    afterPageCompleteCheck.jpg

    afterPageCompleteCheck.jpg

    layoutShift.jpg

    layoutShift.jpg

    largestContentfulPaint.jpg

    largestContentfulPaint.jpg