Run 2 summary

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

Tested 2024-11-21 01:14:52 using Chrome 131.0.6778.69 (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 score74
Total page size1.0 MB
Requests73
Timing metrics
TTFB118 ms
First Paint950 ms
Fully Loaded10.046 s
Google Web Vitals
TTFB118 ms
First Contentful Paint (FCP) 950 ms
Largest Contentful Paint (LCP) 950 ms
Cumulative Layout Shift (CLS) 0.16
816 ms
Total Blocking Time526 ms
Max Potential FID334 ms
CPU metrics
CPU long tasks7
CPU last long task happens at9.123 s
Visual Metrics
First Visual Change967 ms
Speed Index2.567 s
Visual Complete 85%9.667 s
Visual Complete 99%12.267 s
Last Visual Change13.400 s
Screenshot
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| Waterfall | | Download HAR | 

Waterfall

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Video

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| Filmstrip | 

Filmstrip

Use--filmstrip.showAll to show all filmstrips.

0 s
0.2 smwStartup 149 ms
0.5 sCPU Long Task duration 445 ms
1 sDOM Content Loaded Time 937 msFirst Contentful Paint 950 msLCP <P> 950 msFirst Visual Change 967 ms
1.1 sCPU Long Task duration 54 ms
1.2 sCPU Long Task duration 91 ms
1.3 sCPU Long Task duration 62 ms
1.5 sCPU Long Task duration 68 ms
1.6 smwCentralNoticeBanner 1.501 sPage Load Time 1.506 sCPU Long Task duration 334 ms
1.9 s
2 s
9.2 sCPU Long Task duration 217 ms
9.3 s
9.4 sLayout Shift 0.00177 9.375 s
9.5 sLayout Shift 0.00228 9.428 sLayout Shift 0.00134 9.454 sLayout Shift 0.00316 9.484 s
9.6 sLayout Shift 0.00187 9.510 sLayout Shift 0.00445 9.535 sLayout Shift 0.00267 9.565 s
9.7 sLayout Shift 0.01028 9.602 sLayout Shift 0.00988 9.628 sLayout Shift 0.00594 9.651 sVisual Complete 85% 9.667 sLayout Shift 0.00686 9.672 sLayout Shift 0.01636 9.700 s
9.8 sLayout Shift 0.01757 9.734 sLayout Shift 0.00827 9.756 sLayout Shift 0.01356 9.777 s
9.9 sLayout Shift 0.00559 9.801 sLayout Shift 0.00510 9.825 sLayout Shift 0.00837 9.846 sLayout Shift 0.00349 9.867 sLayout Shift 0.00607 9.894 s
10 sLayout Shift 0.00280 9.926 sLayout Shift 0.00449 9.945 sLayout Shift 0.00196 9.972 sLayout Shift 0.00375 9.996 s
10.1 sLayout Shift 0.00152 10.020 sLayout Shift 0.00055 10.039 sFully Loaded 10.046 sLayout Shift 0.00247 10.069 sLayout Shift 0.00235 10.098 s
10.2 sLayout Shift 0.00189 10.161 s
10.3 s
10.4 sLargest Image 10.367 sHeading 10.367 s
10.5 s
10.6 s
10.7 s
10.8 s
10.9 s
11 s
11.1 s
11.2 s
11.3 sVisual Complete 95% 11.234 s
11.4 s
11.5 s
11.6 s
11.7 s
11.8 s
11.9 s
12 s
12.1 s
12.2 s
12.3 sVisual Complete 99% 12.267 s
12.4 s
12.5 s
12.6 s
12.7 s
12.8 s
12.9 s
13 s
13.1 s
13.2 s
13.3 s
13.4 sLast Visual Change 13.400 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 8.0.2.

I am the coach

Coach score

Performance advice (74)

TitleAdviceScore
Don't scale images in the browser (avoidScalingImages)The page has 2 images that are scaled more than 100 pixels. It would be better if those images are sent so the browser don't need to scale them.80
Description: It's easy to scale images in the browser and make sure they look good in different devices, however that is bad for performance! Scaling images in the browser takes extra CPU time and will hurt performance on mobile. And the user will download extra kilobytes (sometimes megabytes) of data that could be avoided. Don't do that, make sure you create multiple version of the same image server-side and serve the appropriate one.
Offenders:
  • https://en.wikipedia.org/static/images/mobile/copyright/wikipedia-wordmark-en.svg
  • https://en.wikipedia.org/static/images/mobile/copyright/wikipedia-tagline-en.svg
    • 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 7 CPU long tasks with the total of 1.271 s. The total blocking time is 526 ms and 1 long task before first contentful paint with total time of 445 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
  • unknown
  • 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 610.9 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/1/1b/Semi-protection-shackle.svg...n-shackle.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/8/8d/President_Barack_Obama..._Barack_Obama.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/1/11/Barack_Obama_signature...signature.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/9/97/President_Barack_Obama...8cropped%29_4.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/e/e9/Official_portrait_of_B..._Barack_Obama.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/4/44/ElectoralCollege2012.s...llege2012.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/d/d7/US_President_Barack_Ob...e_-_2009Jan20.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/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/22...ama-venice-la.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/7/79/PPACA_Premium_Chart.jp...Premium_Chart.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/8/84/Percentage_of_Individu...%2C_1963-2015.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/9/99/P06409PS-0571_%2835946...3594694537%29.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/6/6f/Barack_Obama%27s_trip_..._2016_%289%29.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/7/70/Barack_Obama_with_Afgh...and_Joe_Biden.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/a/ac/Obama_and_Biden_await_..._on_bin_Laden.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/f/f6/Handshake_between_the_...C3%BAl_Castro.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/1/1b/Barack_Obama_welcomes_...e_Oval_Office.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/1/17/Barack_Obama_talks_wit...8637772147%29.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/e/eb/Vladimir_Putin_and_Bar...5-09-29%29_01.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/c/c0/Gallup_Poll-Approval_R...ack_Obama.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/9/96/Obama_Macri_October_20..._October_2017.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/1/15/P20220405AS-1082_%2852...2067439422%29.jpg
  • https://upload.wikimedia.org/wikipedia/en/thumb/6/69/P_vip.svg/28px-P_vip.svg.png
  • https://upload.wikimedia.org/wikipedia/en/thumb/a/a4/Flag_of_the_United_States.s...ed_States.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/e/ef/Flag_of_Hawaii.svg/32p...of_Hawaii.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/9/9b/Flag_of_Chicago%2C_Ill..._Illinois.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/0/01/Flag_of_Illinois.svg/3..._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/2...oting_box.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/c/c1/Blue_iPod_Nano.jpg/12px-Blue_iPod_Nano.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/8/87/IPhone_5.svg/13px-IPhone_5.svg.png
  • https://upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/20px-Commons-logo.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/2/24/Wikinews-logo.svg/27px...news-logo.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Wikisource-logo.svg/26...urce-logo.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/f/ff/Wikidata-logo.svg/27px...data-logo.svg.png
  • https://upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progr...ogressive.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/2/21/Speaker_Icon.svg/15px-Speaker_Icon.svg.png
  • https://upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/1...ory_class.svg.png
  • https://upload.wikimedia.org/wikipedia/en/thumb/d/db/Symbol_list_class.svg/16px-...ist_class.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/f/f0/Seal_of_the_United_Sta...es_Senate.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/4/4b/Michelle_Obama_2013_of...cial_portrait.jpg
  • https://upload.wikimedia.org/wikipedia/en/thumb/e/ed/Nobel_Prize.png/80px-Nobel_Prize.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/f/fa/Wikiquote-logo.svg/23p...uote-logo.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg
  • https://upload.wikimedia.org/wikipedia/commons/4/4d/Icon_pdf_file.png
  • https://upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg
  • https://upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg
  • https://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 JavaScript size shouldn't be too big (javascriptSize)The total JavaScript transfer size is 213.1 kB and the uncompressed size is 750.5 kB. This is quite large. 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...ia.org/w/load.php 71.9 KB265.2 KB
    https://meta.wikimedia.org/w/index.php...a.org/w/index.php 82.2 KB321.4 KB
    https://en.wikipedia.org/w/load.php?lang=en&modules=vue&skin=vector-2022&version=n99vv 54.1 KB146.3 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 kB (23971) 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 23.4 KB182.6 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 (0.1567) 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 unnecessary headers (unnecessaryHeaders)There are 4 responses that sets both a max-age and expires header. There are 73 responses that sets a server header. 23
    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://upload.wikimedia.org/wikipedia/en/thumb/1/1b/Semi-protection-shackle.svg...n-shackle.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/8/8d/President_Barack_Obama..._Barack_Obama.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/1/11/Barack_Obama_signature...signature.svg.png
  • https://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/thumb/9/97/President_Barack_Obama...8cropped%29_4.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/e/e9/Official_portrait_of_B..._Barack_Obama.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/4/44/ElectoralCollege2012.s...llege2012.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/d/d7/US_President_Barack_Ob...e_-_2009Jan20.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/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/22...ama-venice-la.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/7/79/PPACA_Premium_Chart.jp...Premium_Chart.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/8/84/Percentage_of_Individu...%2C_1963-2015.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/9/99/P06409PS-0571_%2835946...3594694537%29.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/6/6f/Barack_Obama%27s_trip_..._2016_%289%29.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/7/70/Barack_Obama_with_Afgh...and_Joe_Biden.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/a/ac/Obama_and_Biden_await_..._on_bin_Laden.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/f/f6/Handshake_between_the_...C3%BAl_Castro.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/1/1b/Barack_Obama_welcomes_...e_Oval_Office.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/1/17/Barack_Obama_talks_wit...8637772147%29.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/e/eb/Vladimir_Putin_and_Bar...5-09-29%29_01.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/c/c0/Gallup_Poll-Approval_R...ack_Obama.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/9/96/Obama_Macri_October_20..._October_2017.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/1/15/P20220405AS-1082_%2852...2067439422%29.jpg
  • https://upload.wikimedia.org/wikipedia/en/thumb/6/69/P_vip.svg/28px-P_vip.svg.png
  • https://upload.wikimedia.org/wikipedia/en/thumb/a/a4/Flag_of_the_United_States.s...ed_States.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/e/ef/Flag_of_Hawaii.svg/32p...of_Hawaii.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/9/9b/Flag_of_Chicago%2C_Ill..._Illinois.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/0/01/Flag_of_Illinois.svg/3..._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/2...oting_box.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/c/c1/Blue_iPod_Nano.jpg/12px-Blue_iPod_Nano.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/8/87/IPhone_5.svg/13px-IPhone_5.svg.png
  • https://upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/20px-Commons-logo.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/2/24/Wikinews-logo.svg/27px...news-logo.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Wikisource-logo.svg/26...urce-logo.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/f/ff/Wikidata-logo.svg/27px...data-logo.svg.png
  • https://upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progr...ogressive.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/2/21/Speaker_Icon.svg/15px-Speaker_Icon.svg.png
  • https://upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/1...ory_class.svg.png
  • https://upload.wikimedia.org/wikipedia/en/thumb/d/db/Symbol_list_class.svg/16px-...ist_class.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/f/f0/Seal_of_the_United_Sta...es_Senate.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/4/4b/Michelle_Obama_2013_of...cial_portrait.jpg
  • https://upload.wikimedia.org/wikipedia/en/thumb/e/ed/Nobel_Prize.png/80px-Nobel_Prize.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/f/fa/Wikiquote-logo.svg/23p...uote-logo.svg.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/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/a/aa/Lock-red-alt-2.svg
  • 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?lang=en&modules=vue&skin=vector-2022&version=n99vv
  • https://en.wikipedia.org/w/load.php?lang=en&modules=vue&skin=vector-2022&version=n99vv
  • 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 1.44.0-wmf.3
    Width1904
    Height56753
    DOM elements21693
    Avg DOM depth17
    Max DOM depth32
    Iframes0
    Script tags6
    Local storage1.0 MB
    Session storage0 b
    Network Information API3g
    Resource Hints
    dns-prefetch
    https://meta.wikimedia.org/
    https://login.wikimedia.org/
    preconnect
    https://upload.wikimedia.org/

    Technologies used to build the page.

    Data collected using Wappalyzerversion 6.10.66.  Use --browsertime.firefox.includeResponseBodies htmlor --browsertime.chrome.includeResponseBodies htmlto help Wappalyser find more information about technologies used.

    TechnologyConfidenceCategory
    MediaWiki 100  Wikis
    PHP 100  Programming languages
    Apache Traffic Server 9.2.5100  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 Index2.567 s
    Largest Image10.367 s
    Heading10.367 s
    Last Meaningful Paint10.367 s
    Visual Complete 85%9.667 s
    Visual Complete 95%11.234 s
    Visual Complete 99%12.267 s
    Last Visual Change13.400 s
    Visual Readiness12.433 s

    Browser Metrics

    Navigation Timing
    backEndTime118 ms
    domContentLoadedTime937 ms
    domInteractiveTime937 ms
    domainLookupTime0 ms
    frontEndTime1.127 s
    pageDownloadTime260 ms
    pageLoadTime1.506 s
    redirectionTime0 ms
    serverConnectionTime0 ms
    serverResponseTime373 ms
    Google Web Vitals
    Time to first byte (TTFB)118 ms
    First Contentful Paint (FCP)950 ms
    Largest Contentful Paint (LCP)950 ms
    Cumulative Layout Shift (CLS)0.16
    Interaction to next paint (INP)816 ms
    Total Blocking Time (TBT)526 ms
    First Contentful Paint info
    Elements that needed recalculate style before FCP15535
    Time spent in recalculate style before FCP211.125 ms
    Extra timings
    TTFB118 ms
    First Paint950 ms
    Load Event End1.506 s
    Fully loaded10.046 s
    User Timing marks
    mwStartup149 ms
    mwCentralNoticeBanner1.501 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 950 ms
    Elements that needed recalculate style before LCP15535
    Time spent in recalculate style before LCP211.125 ms
    Load time0 ms
    Size (width*height)186600
    DOM path
    div:eq(2) > div > div:eq(2) > main#content > div#bodyContent > div#mw-content-text > div:eq(0) > p:eq(3)> div:eq(2) > div > div:eq(2) > main#content > div#bodyContent > div#mw-content-text > div:eq(0) > p:eq(3)>
    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

    0.15666 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"></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(1) > header,body > div:eq(1) > header > div:eq(1) > div#p-search > div > div > form#searchform > div#simpleSearch > div > span,body > div:eq(2)
    0.01636<div id="wmde-banner-app" data-v-app=""></div>,<header class="vector-header mw-header"></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(1) > header,body > div:eq(1) > header > div:eq(1) > div#p-search > div > div > form#searchform > div#simpleSearch > div > span,body > div:eq(2)
    0.01356<div id="wmde-banner-app" data-v-app=""></div>,<header class="vector-header mw-header"></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(1) > header,body > div:eq(1) > header > div:eq(1) > div#p-search > div > div > form#searchform > div#simpleSearch > div > span,body > div:eq(2)
    0.01028<div id="wmde-banner-app" data-v-app=""></div>,<header class="vector-header mw-header"></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(1) > header,body > div:eq(1) > header > div:eq(1) > div#p-search > div > div > form#searchform > div#simpleSearch > div > span,body > div:eq(2)
    0.00988<div id="wmde-banner-app" data-v-app=""></div>,<header class="vector-header mw-header"></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(1) > header,body > div:eq(1) > header > div:eq(1) > div#p-search > div > div > form#searchform > div#simpleSearch > div > span,body > div:eq(2)
    0.00837<div id="wmde-banner-app" data-v-app=""></div>,<header class="vector-header mw-header"></header>,<div class="mw-page-container"></div>
    body > div#wmde-banner-app,body > div:eq(1) > header,body > div:eq(2)
    0.00827<div id="wmde-banner-app" data-v-app=""></div>,<header class="vector-header mw-header"></header>,<div class="mw-page-container"></div>
    body > div#wmde-banner-app,body > div:eq(1) > header,body > div:eq(2)
    0.00686<div id="wmde-banner-app" data-v-app=""></div>,<header class="vector-header mw-header"></header>,<div class="mw-page-container"></div>
    body > div#wmde-banner-app,body > div:eq(1) > header,body > div:eq(2)
    0.00607<div id="wmde-banner-app" data-v-app=""></div>,<header class="vector-header mw-header"></header>,<div class="mw-page-container"></div>
    body > div#wmde-banner-app,body > div:eq(1) > header,body > div:eq(2)
    0.00594<div id="wmde-banner-app" data-v-app=""></div>,<header class="vector-header mw-header"></header>,<div class="mw-page-container"></div>
    body > div#wmde-banner-app,body > div:eq(1) > header,body > div:eq(2)
    0.00559<div id="wmde-banner-app" data-v-app=""></div>,<header class="vector-header mw-header"></header>,<div class="mw-page-container"></div>
    body > div#wmde-banner-app,body > div:eq(1) > header,body > div:eq(2)
    0.00510<div id="wmde-banner-app" data-v-app=""></div>,<header class="vector-header mw-header"></header>,<div class="mw-page-container"></div>
    body > div#wmde-banner-app,body > div:eq(1) > header,body > div:eq(2)
    0.00449<div id="wmde-banner-app" data-v-app=""></div>,<header class="vector-header mw-header"></header>,<div class="mw-page-container"></div>
    body > div#wmde-banner-app,body > div:eq(1) > header,body > div:eq(2)
    0.00445<div id="wmde-banner-app" data-v-app=""></div>,<header class="vector-header mw-header"></header>,<div class="mw-page-container"></div>
    body > div#wmde-banner-app,body > div:eq(1) > header,body > div:eq(2)
    0.00375<div id="wmde-banner-app" data-v-app=""></div>,<header class="vector-header mw-header"></header>,<div class="mw-page-container"></div>
    body > div#wmde-banner-app,body > div:eq(1) > header,body > div:eq(2)
    0.00349<div id="wmde-banner-app" data-v-app=""></div>,<header class="vector-header mw-header"></header>,<div class="mw-page-container"></div>
    body > div#wmde-banner-app,body > div:eq(1) > header,body > div:eq(2)
    0.00316<div id="wmde-banner-app" data-v-app=""></div>,<header class="vector-header mw-header"></header>,<div class="mw-page-container"></div>
    body > div#wmde-banner-app,body > div:eq(1) > header,body > div:eq(2)
    0.00280<div id="wmde-banner-app" data-v-app=""></div>,<header class="vector-header mw-header"></header>,<div class="mw-page-container"></div>
    body > div#wmde-banner-app,body > div:eq(1) > header,body > div:eq(2)
    0.00267<div id="wmde-banner-app" data-v-app=""></div>,<header class="vector-header mw-header"></header>,<div class="mw-page-container"></div>
    body > div#wmde-banner-app,body > div:eq(1) > header,body > div:eq(2)
    0.00247<div id="wmde-banner-app" data-v-app=""></div>,<header class="vector-header mw-header"></header>,<div class="mw-page-container"></div>
    body > div#wmde-banner-app,body > div:eq(1) > header,body > div:eq(2)
    0.00235<div id="wmde-banner-app" data-v-app=""></div>,<header class="vector-header mw-header"></header>,<div class="mw-page-container"></div>
    body > div#wmde-banner-app,body > div:eq(1) > header,body > div:eq(2)
    0.00228<div id="wmde-banner-app" data-v-app=""></div>,<header class="vector-header mw-header"></header>,<div class="mw-page-container"></div>
    body > div#wmde-banner-app,body > div:eq(1) > header,body > div:eq(2)
    0.00196<div id="wmde-banner-app" data-v-app=""></div>,<header class="vector-header mw-header"></header>,<div class="mw-page-container"></div>
    body > div#wmde-banner-app,body > div:eq(1) > header,body > div:eq(2)
    0.00189<div id="wmde-banner-app" data-v-app=""></div>,<header class="vector-header mw-header"></header>,<div class="mw-page-container"></div>
    body > div#wmde-banner-app,body > div:eq(1) > header,body > div:eq(2)
    0.00187<div id="wmde-banner-app" data-v-app=""></div>,<header class="vector-header mw-header"></header>,<div class="mw-page-container"></div>
    body > div#wmde-banner-app,body > div:eq(1) > header,body > div:eq(2)
    0.00177<div id="wmde-banner-app" data-v-app=""></div>,<header class="vector-header mw-header"></header>,<div class="mw-page-container"></div>
    body > div#wmde-banner-app,body > div:eq(1) > header,body > div:eq(2)
    0.00152<div id="wmde-banner-app" data-v-app=""></div>,<header class="vector-header mw-header"></header>,<div class="mw-page-container"></div>
    body > div#wmde-banner-app,body > div:eq(1) > header,body > div:eq(2)
    0.00134<div id="wmde-banner-app" data-v-app=""></div>,<header class="vector-header mw-header"></header>,<div class="mw-page-container"></div>
    body > div#wmde-banner-app,body > div:eq(1) > header,body > div:eq(2)
    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 816 ms.

    Event typepointerover
    Element typeP
    Element class name
    Event target#mw-content-text>div.mw-content-ltr.mw-parser-output>p
    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
    393 ms703.2 ms27.8 ms0.1 ms27.7 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: 14426

    Blocking duration Work durationRender durationPreLayout DurationStyle And Layout Duration
    305 ms335 ms20 ms9.6 ms10.4 ms
    https://en.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=vector-2022

    Forced Style And Layout Duration: 265 ms

    Invoker:  IdleRequestCallback
    Invoker Type: user-callback
    Source Function Name:  doPropagation
    Window attribution: self
    Source char position: 4309

    Blocking duration Work durationRender durationPreLayout DurationStyle And Layout Duration
    169 ms217.6 ms1.4 ms0.5 ms0.9 ms

    Forced Style And Layout Duration: 213 ms

    Invoker:  TimerHandler:setTimeout
    Invoker Type: user-callback
    Window attribution: self
    Source char position: 162788

    Blocking duration Work durationRender durationPreLayout DurationStyle And Layout Duration
    104 ms121.8 ms62.2 ms60.4 ms1.8 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%7Coojs-ui.styles.icons-interactions&skin=vector-2022&version=y0y53

    Invoker:  TimerHandler:setTimeout
    Invoker Type: user-callback
    Window attribution: self
    Source char position: 68844

    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%7Coojs-ui.styles.icons-interactions&skin=vector-2022&version=y0y53

    Invoker:  TimerHandler:setTimeout
    Invoker Type: user-callback
    Window attribution: self
    Source char position: 68844

    Blocking duration Work durationRender durationPreLayout DurationStyle And Layout Duration
    29 ms65.3 ms41.7 ms33.7 ms8 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%7Coojs-ui.styles.icons-interactions&skin=vector-2022&version=y0y53

    Invoker:  TimerHandler:setTimeout
    Invoker Type: user-callback
    Window attribution: self
    Source char position: 68844

    Blocking duration Work durationRender durationPreLayout DurationStyle And Layout Duration
    26 ms47.8 ms47.2 ms24.3 ms22.9 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: 4309

    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: 3231

    Blocking duration Work durationRender durationPreLayout DurationStyle And Layout Duration
    20 ms5.1 ms67.9 ms67 ms0.9 ms
    No availible script information.
    Blocking duration Work durationRender durationPreLayout DurationStyle And Layout Duration
    16 ms24.2 ms53.8 ms49.8 ms4 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: 4309

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

    Forced Style And Layout Duration: 11 ms

    Invoker:  FrameRequestCallback
    Invoker Type: user-callback
    Source Function Name:  flushCssBuffer
    Window attribution: self
    Source char position: 3231

    Server timings

    namedurationdescription
    cache0hit-front
    host0cp3067

    Custom metrics collected through JavaScript

    There are no custom configured scripts.

    Extra metrics collected using scripting

    There are no custom extra metrics from scripting.

    CDP Performance

    namevalue
    AudioHandlers0
    AudioWorkletProcessors0
    Documents22
    Frames20
    JSEventListeners2190
    LayoutObjects27504
    MediaKeySessions0
    MediaKeys0
    Nodes47686
    Resources116
    ContextLifecycleStateObservers28
    V8PerContextDatas2
    WorkerGlobalScopes0
    UACSSResources3
    RTCPeerConnections0
    ResourceFetchers22
    AdSubframes0
    DetachedScriptStates0
    ArrayBufferContents2
    LayoutCount228
    RecalcStyleCount242
    LayoutDuration459
    RecalcStyleDuration845
    DevToolsCommandDuration40
    ScriptDuration412
    V8CompileDuration8
    TaskDuration3183
    TaskOtherDuration1420
    ThreadTime4
    ProcessTime10
    JSHeapUsedSize16373336
    JSHeapTotalSize20738048
    FirstMeaningfulPaint950

    Visual Elements

    NameDisplay TimeX YWidthHeight
    LargestImage (220px-President_Barack_Obama.jpg)10.367 s 1161 668 220 275
    <img alt="Obama standing in the Oval Office with his arms folded and smiling" src="//upload.wikimedia.org/wikipedia/commons/thumb/8/8d/President_Barack_Obama.jpg/220px-President_Barack_Obama.jpg" decoding="async" width="220" height="275" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/8d/President_Barack_Obama.jpg/330px-President_Barack_Obama.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/8/8d/President_Barack_Obama.jpg/440px-President_Barack_Obama.jpg 2x" data-file-width="2687" data-file-height="3356">
    Heading10.367 s 478 445 787 40
    <h1 id="firstHeading" class="firstHeading mw-first-heading"></h1>
    | 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 requests73
    Total domains3
    Total transfer size1.0 MB
    Total content size3.0 MB
    Responses missing compression7
    Number of cookies2
    Third party cookies0
    Requests per response code
    20072
    2041

    Largest assets on the page (by transfer size)

    URLTypeTransfer SizeContent Size
    https://en.wikipedia...wiki/Barack_Obamahtml289.8 KB1.6 MB
    https://meta.wikimed...a.org/w/index.phpjavascript82.2 KB321.4 KB
    https://en.wikipedia...ia.org/w/load.phpjavascript71.9 KB265.2 KB
    https://en.wikipedia...ia.org/w/load.phpjavascript54.1 KB146.3 KB
    https://upload.wikim...llege2012.svg.pngimage31.4 KB30.5 KB
    https://en.wikipedia...ia.org/w/load.phpcss23.4 KB182.6 KB
    https://upload.wikim..._Barack_Obama.jpgimage19.1 KB18.2 KB
    https://upload.wikim...school_record.jpgimage18.9 KB18.0 KB
    https://upload.wikim...llege2008.svg.pngimage18.8 KB17.9 KB
    https://upload.wikim..._2016_%289%29.jpgimage18.2 KB17.3 KB
    https://upload.wikim...resident_-_v1.pngimage17.9 KB17.0 KB
    https://upload.wikim...5471954323%29.jpgimage17.0 KB16.1 KB
    https://upload.wikim...e_-_2009Jan20.jpgimage16.1 KB15.2 KB
    https://upload.wikim..._and_children.jpgimage16.0 KB15.1 KB
    https://upload.wikim...3594694537%29.jpgimage15.6 KB14.8 KB
    https://upload.wikim...2067439422%29.jpgimage15.6 KB14.7 KB
    https://upload.wikim..._on_bin_Laden.jpgimage15.3 KB14.5 KB
    https://upload.wikim...amiltondavis1.jpgimage14.8 KB14.0 KB
    https://upload.wikim..._Barack_Obama.jpgimage14.5 KB13.6 KB
    https://upload.wikim...ama-venice-la.jpgimage13.8 KB12.9 KB

    Requests and sizes per content type

    ContentHeader SizeTransfer SizeContent SizeRequests
    html0 b289.8 KB1.6 MB1
    css0 b23.4 KB182.6 KB1
    javascript0 b208.1 KB732.9 KB3
    image0 b510.3 KB459.9 KB58
    svg0 b8.0 KB4.3 KB7
    plain0 b546 B0 b1
    json0 b4.2 KB3.6 KB2
    Total0 b1.0 MB3.0 MB73

    Data per domain

    DomainTotal download timeTransfer SizeContent SizeRequests
    en.wikipedia.org2.084 s447.9 KB2.2 MB11
    upload.wikimedia.org48.264 s514.4 KB462.9 KB61
    meta.wikimedia.org176 ms82.2 KB321.4 KB1

    Expires and last modified statistics

    typeminmedianmax
    Expires0 seconds0 seconds1 year
    Last modified2 minutes23 weeks8 years

    Console log

    The page logs the following messages to the console.

    LevelMessage
    WARNING https://en.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=vector-2022 11:274 "This page is using the deprecated ResourceLoader module \"mediawiki.Uri\".\n[1.43] Please use browser native URL."
    SEVERE https://en.wikipedia.org/w/load.php?lang=en&modules=skins.vector.search.codex.scripts%7Cvue&skin=vector-2022&version=148qw 153 Error: <path> attribute transform: Expected transform function, "none".
    WARNING https://en.wikipedia.org/wiki/Main_Page - The resource https://en.wikipedia.org/static/images/project-logos/enwiki.png was preloaded using link preload but not used within a few seconds from the window's load event. Please make sure it has an appropriate `as` value and it is preloaded intentionally.
    WARNING https://en.wikipedia.org/wiki/Main_Page - The resource https://en.wikipedia.org/static/images/project-logos/enwiki.png was preloaded using link preload but not used within a few seconds from the window's load event. Please make sure it has an appropriate `as` value and it is preloaded intentionally.
    WARNING https://en.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=vector-2022 11:274 "This page is using the deprecated ResourceLoader module \"mediawiki.Uri\".\n[1.43] Please use browser native URL."
    SEVERE https://en.wikipedia.org/w/load.php?lang=en&modules=vue&skin=vector-2022&version=n99vv 87 Error: <path> attribute transform: Expected transform function, "none".

    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
    javascript136.3 KB2
    image0 b0
    font0 b0
    plain546 B1
    json4.2 KB2
    Total141.0 KB5

    Render blocking requests

    Render blocking information directly from Chrome.

    BlockingIn body parser blockingPotentially blocking
    100

    Render information

    URLType
    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.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 526
    Max Potential First Input Delay 334
    Long Tasks before First Paint1445
    Long Tasks before First Contentful Paint1445
    Long Tasks before Largest Contentful Paint1445
    Long Tasks after Load Event End2551
    Total Long Tasks71271

    CPU last long task happened at 9.123 s

    Individual Long Tasks

    namestartTimedurationcontainerIdcontainerNamecontainerSrccontainerType
    unknown424445window
    self105554window
    self112891window
    unknown123262window
    unknown140868window
    self1509334window
    self9123217window

    CPU time spent

    Calculated using Tracium.

    Categories (ms)
    parseHTML106
    styleLayout1296
    paintCompositeRender246
    scriptParseCompile8
    scriptEvaluation413
    garbageCollection28
    other1239
    Events (ms)
    UpdateLayoutTree850
    PrePaint597
    Layout444
    FunctionCall362
    RunTask280
    CpuProfiler::StartProfiling170
    Paint163
    Layerize106
    ParseHTML101
    HitTest49
    PaintImage25
    Commit23
    RunMicrotasks22
    DocumentLoader::BodyLoadingFinished18
    IntersectionObserverController::computeIntersections16

    Time spent per request

    URLCPU time (ms)
    https://en.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=vector-2022444
    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%7Coojs-ui.styles.icons-interactions&skin=vector-2022&version=y0y53175
    https://meta.wikimedia.org/w/index.php?title=Special:BannerLoader&campaign=C24_WMDE_Desktop_EN_04&banner=B24_WMDE_Desktop_EN_04_var&uselang=en&debug=false20
    | afterPageCompleteCheck.jpg | layoutShift.jpg | largestContentfulPaint.jpg | 

    Screenshots

    afterPageCompleteCheck.jpg

    afterPageCompleteCheck.jpg

    layoutShift.jpg

    layoutShift.jpg

    largestContentfulPaint.jpg

    largestContentfulPaint.jpg