Page summary

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

Tested 2026-04-13 00:58:56 using Chrome 146.0.7680.80 (script).(runtime settings).

Test mobile as a logged in user

Login the user with an empty browser cache, then visit Obama and Facebook

SummaryWaterfall MetricsVideoFilmstrip CoachPageXrayCPU
| Summary | | Download Video | Download Timeline Log | Download HAR | Download Console Logs | 

Summary

MetricValue
Page metrics
Performance Score83
Total Page Transfer Size361.2 KB
Requests11
Timing metrics
TTFB [median]1.547 s
First Paint [median]2.384 s
Fully Loaded [median]8.518 s
Google Web Vitals
TTFB [median]1.547 s
First Contentful Paint (FCP) [median]2.384 s
Largest Contentful Paint (LCP) [median]2.552 s
Cumulative Layout Shift (CLS) [median]0.20
Total Blocking Time [median]950 ms
Max Potential FID [median]309 ms
CPU metrics
CPU long tasks [median]15
CPU longest task duration309 ms
CPU last long task happens at4.734 s
Visual Metrics
First Visual Change [median]2.366 s
Speed Index [median]3.704 s
Visual Complete 85% [median]4.466 s
Visual Complete 99% [median]12.766 s
Last Visual Change [median]18.400 s
Screenshot of run 1

Timings Summary

Metricminmedianmeanmax
Visual Metrics
FirstVisualChange2.366 s2.366 s2.366 s2.366 s
LastVisualChange18.400 s18.400 s18.400 s18.400 s
SpeedIndex3.704 s3.704 s3.704 s3.704 s
LargestImage2.366 s2.366 s2.366 s2.366 s
Heading4.433 s4.433 s4.433 s4.433 s
LargestContentfulPaint4.433 s4.433 s4.433 s4.433 s
LastMeaningfulPaint4.433 s4.433 s4.433 s4.433 s
VisualReadiness16.034 s16.034 s16.034 s16.034 s
VisualComplete854.466 s4.466 s4.466 s4.466 s
VisualComplete9512.766 s12.766 s12.766 s12.766 s
VisualComplete9912.766 s12.766 s12.766 s12.766 s
Google Web Vitals
Time To First Byte (TTFB)1.547 s1.547 s1.547 s1.547 s
Largest Contentful Paint (LCP)2.552 s2.552 s2.552 s2.552 s
First Contentful Paint (FCP)2.384 s2.384 s2.384 s2.384 s
Cumulative Layout Shift (CLS)0.20370.20370.20370.2037
More metrics
firstPaint2.384 s2.384 s2.384 s2.384 s
loadEventEnd3.013 s3.013 s3.013 s3.013 s
User Timing
mwStartup1.868 s1.868 s1.868 s1.868 s
mwCentralNoticeBanner4.367 s4.367 s4.367 s4.367 s
CPU
Total Blocking Time950 ms950 ms950 ms950 ms
Max Potential FID309 ms309 ms309 ms309 ms
CPU long tasks 15151515
CPU last long task happens at4.734 s4.734 s4.734 s4.734 s
Download videoDownload timelineDownload HARDownload Console Logs
| Waterfall | | Download HAR | 

Waterfall

Run 1 SpeedIndex median

Download HARCompare
| Video | Download | 

Video

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| Filmstrip | 

Filmstrip

Use--filmstrip.showAll to show all filmstrips.

0 s
1.9 smwStartup 1.868 sCPU Long Task duration 60 ms
2.3 sCPU Long Task duration 154 ms
2.4 sFirst Visual Change 2.366 sLargest Image 2.366 sFirst Contentful Paint 2.384 s
2.5 sCPU Long Task duration 93 ms
2.6 sCPU Long Task duration 71 msLCP <P> 2.552 s
2.7 s
2.8 sCPU Long Task duration 160 ms
2.9 s
3 sCPU Long Task duration 80 msDOM Content Loaded Time 2.999 s
3.1 sPage Load Time 3.013 s
3.2 sCPU Long Task duration 93 ms
3.3 sCPU Long Task duration 72 ms
3.4 sCPU Long Task duration 309 ms
3.5 s
3.6 s
3.7 s
3.8 sCPU Long Task duration 53 ms
3.9 sCPU Long Task duration 262 ms
4 s
4.1 s
4.2 sCPU Long Task duration 158 ms
4.3 s
4.4 smwCentralNoticeBanner 4.367 sCPU Long Task duration 60 ms
4.5 sLayout Shift 0.20372 4.409 sHeading 4.433 sVisual Complete 85% 4.466 s
4.6 sCPU Long Task duration 61 ms
4.7 s
4.8 sCPU Long Task duration 128 ms
4.9 s
5 s
5.1 s
5.2 s
5.3 s
5.4 s
5.5 s
5.6 s
5.7 s
5.8 s
5.9 s
6 s
6.1 s
6.2 s
6.3 s
6.4 s
6.5 s
6.6 s
6.7 s
6.8 s
6.9 s
7.6 s
7.7 s
7.8 s
7.9 s
8 s
8.1 s
8.2 s
8.3 s
8.4 s
8.5 s
8.6 sFully Loaded 8.518 s
8.7 s
8.8 s
8.9 s
9 s
9.1 s
9.2 s
9.3 s
9.4 s
9.5 s
9.6 s
9.7 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 s
12.7 s
12.8 sVisual Complete 95% 12.766 sVisual Complete 99% 12.766 s
12.9 s
13 s
13.1 s
13.2 s
13.3 s
13.4 s
13.5 s
13.6 s
13.7 s
13.8 s
13.9 s
14.7 s
14.8 s
14.9 s
15 s
15.1 s
15.2 s
15.3 s
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15.5 s
15.6 s
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15.8 s
15.9 s
16 s
16.1 s
16.2 s
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16.5 s
16.6 s
16.7 s
16.8 s
17.7 s
17.8 s
17.9 s
18 s
18.1 s
18.2 s
18.3 s
18.4 sLast Visual Change 18.400 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 8.1.3.

I am the coach

Coach score

Performance advice (83)

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-25.svg
  • https://en.wikipedia.org/static/images/mobile/copyright/wikipedia-wordmark-en-25.svg
    • Have a fast first contentful paint (firstContentfulPaint)First contentful paint can be improved (2.384 s). It is in the Google Web Vitals needs improvement range, slower than 1.8 seconds.50
    Description: The First Contentful Paint (FCP) metric measures the time from when the page starts loading to when any part of the page content is rendered on the screen. For this metric, "content" refers to text, images (including background images), <svg> elements, or non-white <canvas> elements.
    Inline CSS for faster first render (inlineCss)The page has both inline CSS and CSS requests even though it uses a HTTP/2-ish connection. If you have many users on slow connections, it can be better to only inline the CSS. Run your own tests and check the waterfall graph to see what happens.95
    Description: In the early days of the Internet, inlining CSS was one of the ugliest things you can do. That has changed if you want your page to start rendering fast for your user. Always inline the critical CSS when you use HTTP/1 and HTTP/2 (avoid doing CSS requests that block rendering) and lazy load and cache the rest of the CSS. It is a little more complicated when using HTTP/2. Does your server support HTTP push? Then maybe that can help. Do you have a lot of users on a slow connection and are serving large chunks of HTML? Then it could be better to use the inline technique, becasue some servers always prioritize HTML content over CSS so the user needs to download the HTML first, before the CSS is downloaded.
    Have a fast largest contentful paint (largestContentfulPaint)Largest contentful paint can be improved 2.552 s. It is in the Google Web Vitals needs improvement range, slower than 2.5 seconds.80
    Description: Largest contentful paint is one of Google Web Vitals and reports the render time of the largest image or text block visible within the viewport, relative to when the page first started loading. To be fast according to Google, it needs to render before 2.5 seconds and results over 4 seconds is poor performance.
    Offenders:
  • <p></p>
    • Avoid CPU Long Tasks (longTasks)The page has 15 CPU long tasks with the total of 1.814 s. The total blocking time is 950 ms and 2 long tasks before first contentful paint with total time of 214 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
  • unknown
  • self
  • self
  • unknown
  • self
  • self
  • self
  • self
  • self
  • self
  • self
  • self
  • self
    • Avoid extra requests by setting cache headers (cacheHeaders)The page has 5 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 104.6 kB the next access.50
    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/6/64/Facebook_user_page.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/b/b9/2023_Facebook_icon.svg...book_icon.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/9/93/Facebook_logo_%282023%...282023%29.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/b/b0/Increase2.svg/40px-Increase2.svg.png
  • https://meta.wikimedia.org/w/index.php...a.org/w/index.php
    • Long cache headers is good (cacheHeadersLong)The page has 1 request that have a shorter cache time than 30 days (but still a cache time).99
    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
    • Make each CSS response small (optimalCssSize)https://en.wikipedia.org/w/load.php?lang=en&modules=ext.chart.styles%7Cext.cite.styles%7Cext.echo.styles.alert%2Cbadge%7Cext.personalDashboard.menuIcon%7Cext.relatedArticles.styles%7Cext.wikimediaBadges%7Cext.wikimediamessages.styles%7Cmediawiki.hlist%7Cmediawiki.page.gallery.styles%7Cmobile.init.styles%7Coojs-ui.styles.icons-alerts%7Cskins.minerva.amc.styles%7Cskins.minerva.codex.styles%7Cskins.minerva.content.styles.images%7Cskins.minerva.icons%2Cstyles%7Cskins.minerva.loggedin.styles%7Cskins.minerva.overflow.icons%7Cskins.minerva.personalMenu.icons%7Cwikibase.client.init&only=styles&skin=minerva size is 25.1 kB (25126) and that is bigger than the limit of 14.5 kB. Try to make the CSS files fit into 14.5 KB.90
    Description: Make CSS responses small to fit into the magic number TCP window size of 14.5 KB. The browser can then download the CSS faster and that will make the page start rendering earlier.
    Offenders:
    URLTransfer sizeContent size
    https://en.wikipedia.org/w/load.php...ia.org/w/load.php 24.5 KB191.8 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/Facebook
  • https://meta.wikimedia.org/w/index.php...a.org/w/index.php

    • Best practice advice (82)

    TitleAdviceScore
    Cumulative Layout Shift (cumulativeLayoutShift)You have a cumulative layout shift score (0.2037) that needs improvements. It is in the Google Web Vitals needs improvement range, shift higher than 0.1. You should manually check the filmstrip or video and check if it will affect the user.50
    Description: Cumulative Layout Shift measures the sum total of all individual layout shift scores for unexpected layout shift that occur. The metric is measuring visual stability by quantify how often users experience unexpected layout shifts. It is one of Google Web Vitals.
    Meta description (metaDescription)The page is missing a meta description.0
    Description: Use a page description to make the page more relevant to search engines.
    Do not send too long headers (longHeaders)https://en.wikipedia.org/wiki/Facebook has a header content-security-policy that is 1419 characters long. https://en.wikipedia.org/wiki/Facebook has a header content-security-policy-report-only that is 1397 characters long. https://meta.wikimed...a.org/w/index.php has a header content-security-policy that is 1419 characters long. https://meta.wikimed...a.org/w/index.php has a header content-security-policy-report-only that is 1397 characters long. 96
    Description: Do not send response headers that are too long.
    Offenders:
  • https://en.wikipedia.org/wiki/Facebook
  • https://en.wikipedia.org/wiki/Facebook
  • https://meta.wikimedia.org/w/index.php...a.org/w/index.php
  • https://meta.wikimedia.org/w/index.php...a.org/w/index.php
    • Avoid unnecessary headers (unnecessaryHeaders)There are 5 responses that sets both a max-age and expires header. There are 11 responses that sets a server header. 84
    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/Facebook
  • https://en.wikipedia.org/wiki/Facebook
  • 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/6/64/Facebook_user_page.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/b/b9/2023_Facebook_icon.svg...book_icon.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/9/93/Facebook_logo_%282023%...282023%29.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/b/b0/Increase2.svg/40px-Increase2.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://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://meta.wikimedia.org/w/index.php...a.org/w/index.php
  • https://en.wikipedia.org/ins-502b/v2/events?hasty=true

    • Privacy advice (94)

    TitleAdviceScore
    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/Facebook

    • Page info

    Page info
    TitleFacebook - Wikipedia
    GeneratorMediaWiki 1.46.0-wmf.23
    Width361
    Height4434
    DOM elements11802
    Avg DOM depth13
    Max DOM depth20
    Iframes0
    Script tags8
    Local storage1.3 MB
    Session storage0 b
    Network Information API4g
    Resource Hints
    dns-prefetch
    https://meta.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
    HSTS 100  Security
    | Browser metrics | Visual Metrics | Largest Contentful Paint | Cumulative Layout Shift | Long Aninimation Frames | Visual Elements | Server timings | 

    Data from run 1

    Visual Metrics

    Visual Metrics
    First Visual Change2.366 s
    Speed Index3.704 s
    Largest Image2.366 s
    Heading4.433 s
    LargestContentfulPaint4.433 s
    Last Meaningful Paint4.433 s
    Largest Contentful Paint4.433 s
    Visual Complete 85%4.466 s
    Visual Complete 95%12.766 s
    Visual Complete 99%12.766 s
    Last Visual Change18.400 s
    Visual Readiness16.034 s

    Browser Metrics

    Navigation Timing
    backEndTime1.547 s
    domContentLoadedTime2.999 s
    domInteractiveTime2.999 s
    domainLookupTime0 ms
    frontEndTime926 ms
    pageDownloadTime540 ms
    pageLoadTime3.013 s
    redirectionTime0 ms
    serverConnectionTime0 ms
    serverResponseTime2.081 s
    Google Web Vitals
    Time to first byte (TTFB)1.547 s
    First Contentful Paint (FCP)2.384 s
    Largest Contentful Paint (LCP)2.552 s
    Cumulative Layout Shift (CLS)0.20
    Total Blocking Time (TBT)950 ms
    First Contentful Paint info
    Elements that needed recalculate style before FCP158
    Time spent in recalculate style before FCP98.33 ms
    Extra timings
    TTFB1.547 s
    First Paint2.384 s
    Load Event End3.013 s
    Fully loaded8.518 s
    User Timing marks
    mwStartup1.868 s
    mwCentralNoticeBanner4.367 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 2.552 s
    Element render delay1.005 s
    TTFB1.547 s
    Resource delay0 ms
    Resource load duration0 ms
    Elements that needed recalculate style before LCP386
    Time spent in recalculate style before LCP124.904 ms
    Load time0 ms
    Size (width*height)83385
    DOM path
    div#mw-mf-viewport > div#mw-mf-page-center > main#content > div#bodyContent > div#mw-content-text > div:eq(0) > section#mf-section-0 > p:eq(1)> div#mw-mf-viewport > div#mw-mf-page-center > main#content > div#bodyContent > div#mw-content-text > div:eq(0) > section#mf-section-0 > p:eq(1)>
    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

    0.20372 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
    0.20372<div id="bodyContent" class="content"></div>,<div class="pre-content heading-holder"></div>,<ul id="p-views" class="page-actions-menu__list minerva-icon-only-menu"></ul>,<table class="infobox vcard"></table>
    body > div#mw-mf-viewport > div#mw-mf-page-center > main#content > div#bodyContent,body > div#mw-mf-viewport > div#mw-mf-page-center > main#content > div:eq(1),body > div#mw-mf-viewport > div#mw-mf-page-center > main#content > div:eq(1) > nav > ul#p-views,body > div#mw-mf-viewport > div#mw-mf-page-center > main#content > div#bodyContent > div#mw-content-text > div:eq(0) > section#mf-section-0 > table
    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.

    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
    267.5 ms349.8 ms8.1 ms0 ms8.1 ms
    https://en.wikipedia.org/w/load.php?lang=en&modules=ext.chart.bootstrap%7Cjquery&skin=minerva&version=s42id

    Invoker:  TimerHandler:setTimeout
    Invoker Type: user-callback
    Window attribution: self
    Source char position: 46910

    https://en.wikipedia.org/w/load.php?lang=en&modules=ext.chart.bootstrap%7Cjquery&skin=minerva&version=s42id

    Invoker:  TimerHandler:setTimeout
    Invoker Type: user-callback
    Window attribution: self
    Source char position: 46910

    https://en.wikipedia.org/w/load.php?lang=en&modules=ext.chart.bootstrap%7Cjquery&skin=minerva&version=s42id

    Invoker:  TimerHandler:setTimeout
    Invoker Type: user-callback
    Window attribution: self
    Source char position: 46910

    Blocking duration Work durationRender durationPreLayout DurationStyle And Layout Duration
    211.9 ms34 ms251.6 ms240.2 ms11.4 ms
    https://en.wikipedia.org/w/load.php?lang=en&modules=ext.chart.bootstrap%7Cjquery&skin=minerva&version=s42id

    Invoker:  TimerHandler:setTimeout
    Invoker Type: user-callback
    Window attribution: self
    Source char position: 46910

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

    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.chart.bootstrap%7Cjquery&skin=minerva&version=s42id

    Invoker:  TimerHandler:setTimeout
    Invoker Type: user-callback
    Window attribution: self
    Source char position: 46910

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

    Forced Style And Layout Duration: 41 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
    181.8 ms604.4 ms142.8 ms0 ms142.8 ms
    https://en.wikipedia.org/wiki/Facebook

    Invoker:  https://en.wikipedia.org/wiki/Facebook
    Invoker Type: classic-script
    Window attribution: self

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

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

    Blocking duration Work durationRender durationPreLayout DurationStyle And Layout Duration
    153.8 ms160.5 ms43.4 ms0 ms43.4 ms
    No availible script information.
    Blocking duration Work durationRender durationPreLayout DurationStyle And Layout Duration
    109.8 ms177.3 ms1.1 ms0 ms1.1 ms
    https://en.wikipedia.org/w/load.php?lang=en&modules=ext.chart.bootstrap%7Cjquery&skin=minerva&version=s42id

    Forced Style And Layout Duration: 19 ms

    Invoker:  TimerHandler:setTimeout
    Invoker Type: user-callback
    Window attribution: self
    Source char position: 46910

    Blocking duration Work durationRender durationPreLayout DurationStyle And Layout Duration
    107.2 ms94 ms63.7 ms46.8 ms16.9 ms
    https://en.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=minerva

    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=minerva

    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
    78.2 ms128.2 ms0 ms0 ms0 ms
    https://en.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=minerva

    Invoker:  IdleRequestCallback
    Invoker Type: user-callback
    Source Function Name:  flushWrites
    Window attribution: self
    Source char position: 19340

    Blocking duration Work durationRender durationPreLayout DurationStyle And Layout Duration
    43.4 ms17.5 ms82.2 ms0 ms82.2 ms
    No availible script information.
    Blocking duration Work durationRender durationPreLayout DurationStyle And Layout Duration
    41.2 ms86.8 ms20 ms0 ms20 ms
    https://en.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=minerva

    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
    29.9 ms83.6 ms41.9 ms22.8 ms19.1 ms
    https://en.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=minerva

    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.chart.bootstrap%7Cjquery&skin=minerva&version=s42id

    Invoker:  TimerHandler:setTimeout
    Invoker Type: user-callback
    Window attribution: self
    Source char position: 46910

    https://en.wikipedia.org/w/load.php?lang=en&modules=oojs-ui-core&skin=minerva&version=1whkk

    Invoker:  https://en.wikipedia.org/w/load.php?lang=en&modules=oojs-ui-core&skin=minerva&version=1whkk
    Invoker Type: classic-script
    Window attribution: self

    https://en.wikipedia.org/w/load.php?lang=en&modules=ext.chart.bootstrap%7Cjquery&skin=minerva&version=s42id

    Invoker:  TimerHandler:setTimeout
    Invoker Type: user-callback
    Window attribution: self
    Source char position: 46910

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

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

    Server timings

    namedurationdescription
    cache0pass
    host0cp3070

    Custom metrics collected through JavaScript

    There are no custom configured scripts.

    Extra metrics collected using scripting

    There are no custom extra metrics from scripting.

    Visual Elements

    NameDisplay TimeX YWidthHeight
    LargestImage (wikipedia-wordmark-en-25.svg)2.366 s 53 16 140 22
    <img src="/static/images/mobile/copyright/wikipedia-wordmark-en-25.svg" alt="Wikipedia" width="140" height="22" style="width: 8.75em; height: 1.375em;">
    Heading4.433 s 16 229 328 37
    <h1 id="firstHeading" class="firstHeading mw-first-heading"></h1>
    LargestContentfulPaint4.433 s 16 440 328 264
    <p></p>
    | Summary  | Largest responses  | Requests and sizes per content type  | Data per domain | Expires and last modified statistics  | Requests loaded after onLoad event  | 

    PageXray

    How the page is built.

    Summary
    HTTP versionHTTP/2.0
    Total requests11
    Total domains3
    Total transfer size361.2 KB
    Total content size1.4 MB
    Responses missing compression5
    Number of cookies2
    Third party cookies0
    Requests per response code
    20010
    2021

    Largest assets on the page (by transfer size)

    URLTypeTransfer SizeContent Size
    https://en.wikipedia.org/wiki/Facebookhtml188.2 KB1.0 MB
    https://upload.wikim...ook_user_page.pngimage82.1 KB81.1 KB
    https://en.wikipedia...ia.org/w/load.phpjavascript40.5 KB139.0 KB
    https://en.wikipedia...ia.org/w/load.phpcss24.5 KB191.8 KB
    https://upload.wikim...book_icon.svg.pngimage7.7 KB6.8 KB
    https://meta.wikimed...a.org/w/index.phpjavascript6.1 KB8.6 KB
    https://upload.wikim...282023%29.svg.pngimage5.2 KB4.3 KB
    https://en.wikipedia...ia.org/w/load.phpjavascript3.8 KB13.2 KB
    https://upload.wikim...Increase2.svg.pngimage1.1 KB180 B
    https://en.wikipedia...ia.org/w/load.phpsvg1.1 KB292 B
    https://en.wikipedia...ns-502b/v2/eventsplain867 B0 b

    Requests and sizes per content type

    ContentHeader SizeTransfer SizeContent SizeRequests
    html0 b188.2 KB1.0 MB1
    css0 b24.5 KB191.8 KB1
    javascript0 b50.4 KB160.7 KB3
    image0 b96.1 KB92.3 KB4
    svg0 b1.1 KB292 B1
    plain0 b867 B0 b1
    Total0 b361.2 KB1.4 MB11

    Data per domain

    DomainTotal download timeTransfer SizeContent SizeRequests
    en.wikipedia.org3.004 s259.0 KB1.3 MB6
    upload.wikimedia.org784 ms96.1 KB92.3 KB4
    meta.wikimedia.org105 ms6.1 KB8.6 KB1

    Expires and last modified statistics

    typeminmedianmax
    Expires0 seconds0 seconds4 weeks
    Last modified2 minutes1 week2 years

    Requests loaded after onLoad event

    Included requests done after load event end.

    ContentTransfer SizeRequests
    html0 b0
    css0 b0
    javascript9.9 KB2
    image0 b0
    font0 b0
    plain867 B1
    Total10.8 KB3

    Requests loaded after onContentLoad

    Includes requests done after DOM content loaded.

    ContentTransfer SizeRequests
    html0 b0
    css0 b0
    javascript9.9 KB2
    image0 b0
    font0 b0
    plain867 B1
    Total10.8 KB3
    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 950
    Max Potential First Input Delay 309
    Long Tasks before First Paint2214
    Long Tasks before First Contentful Paint2214
    Long Tasks before Largest Contentful Paint4378
    Long Tasks after Load Event End91196
    Total Long Tasks151814

    CPU last long task happened at 4.734 s

    Individual Long Tasks

    namestartTimedurationcontainerIdcontainerNamecontainerSrccontainerType
    self186860window
    unknown2211154window
    unknown244893window
    self254371window
    self2751160window
    unknown291280window
    self313393window
    self322772window
    self3338309window
    self374953window
    self3836262window
    self4115158window
    self437060window
    self455961window
    self4734128window

    CPU time spent

    Calculated using Tracium.

    Categories (ms)
    parseHTML287
    styleLayout767
    paintCompositeRender88
    scriptParseCompile12
    scriptEvaluation1445
    garbageCollection89
    other3063
    Events (ms)
    FunctionCall1261
    RunTask1222
    UpdateLayoutTree608
    CpuProfiler::StartProfiling503
    PrePaint443
    Layerize378
    ParseHTML266
    Layout157
    Commit143
    IntersectionObserverController::computeIntersections114
    DocumentLoader::BodyLoadingFinished76
    DecodedDataDocumentParser::AppendBytes73
    v8.run69
    Paint56
    V8.HandleInterrupts32
    V8.GC_MC_INCREMENTAL_EMBEDDER_TRACING21
    v8.produceCache21
    ParseAuthorStyleSheet20
    v8.callFunction18
    PaintImage17
    V8.GC_MC_INCREMENTAL15
    V8.GC_MC_EVACUATE_UPDATE_POINTERS_TO_NEW_ROOTS13
    HTMLDocumentParser::MaybeFetchQueuedPreloads13
    v8.compile12
    V8.GC_MARK_COMPACTOR12
    RunMicrotasks11
    DocumentLoader::BodyDataReceivedImpl10

    Time spent per request

    URLCPU time (ms)
    https://en.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=minerva1427
    https://en.wikipedia.org/w/load.php?lang=en&modules=ext.chart.bootstrap%7Cjquery&skin=minerva&version=s42id639
    https://meta.wikimedia.org/w/index.php?title=Special:BannerLoader&campaign=Picture+of+the+Year+2025+Round+1&banner=POTY_2020_R1_Seddon&uselang=en&debug=false33
    https://en.wikipedia.org/w/load.php?lang=en&modules=oojs-ui-core&skin=minerva&version=1whkk22
    https://en.wikipedia.org/wiki/Facebook17
    https://en.wikipedia.org/w/load.php?lang=en&modules=ext.centralNotice.display&skin=minerva&version=10yis15