Run 3 summary

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

Tested 2025-06-18 14:23:54 using Chrome 137.0.7151.55 (script).(runtime settings).

Test visiting multiple pages on emulated mobile

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

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SummaryWaterfall MetricsVideoFilmstrip CoachPageXrayCPU Screenshots

Summary

MetricValue
Page metrics
Performance score87
Total page size389.2 KB
Requests12
Timing metrics
TTFB118 ms
First Paint516 ms
Fully Loaded2.888 s
Google Web Vitals
TTFB118 ms
First Contentful Paint (FCP) 516 ms
Largest Contentful Paint (LCP) 976 ms
Cumulative Layout Shift (CLS) 0.00
Total Blocking Time1.383 s
Max Potential FID419 ms
CPU metrics
CPU long tasks15
CPU last long task happens at3.559 s
Visual Metrics
First Visual Change534 ms
Speed Index2.323 s
Visual Complete 85%3.534 s
Visual Complete 99%11.834 s
Last Visual Change11.867 s
Screenshot
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| Waterfall | | Download HAR | 

Waterfall

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| Video | Download | 

Video

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| Filmstrip | 

Filmstrip

Use--filmstrip.showAll to show all filmstrips.

0 s
0.3 sCPU Long Task duration 63 msmwStartup 268 ms
0.4 sCPU Long Task duration 101 ms
0.6 sFirst Contentful Paint 516 msFirst Visual Change 534 msLargest Image 534 ms
0.7 s
0.8 s
0.9 sCPU Long Task duration 123 ms
1 sLCP <P> 976 ms
1.1 sCPU Long Task duration 78 ms
1.2 sCPU Long Task duration 61 ms
1.4 sCPU Long Task duration 335 ms
1.5 s
1.6 sDOM Content Loaded Time 1.565 s
1.7 s
1.8 sPage Load Time 1.714 s
2 sCPU Long Task duration 103 ms
2.1 sCPU Long Task duration 52 ms
2.2 sCPU Long Task duration 419 ms
2.6 sCPU Long Task duration 57 ms
2.7 sCPU Long Task duration 109 ms
2.8 sCPU Long Task duration 321 ms
2.9 sFully Loaded 2.888 s
3.2 sCPU Long Task duration 185 ms
3.4 smwCentralNoticeBanner 3.396 s
3.5 sCPU Long Task duration 86 msHeading 3.500 s
3.6 sVisual Complete 85% 3.534 sVisual Complete 95% 3.534 sCPU Long Task duration 104 ms
3.7 s
3.8 s
3.9 s
4 s
4.1 s
4.3 s
4.4 s
11.9 sVisual Complete 99% 11.834 sLast Visual Change 11.867 s
| Performance advice | Best practice advice | Privacy advice | Page info | Technologies | 

Coach

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

I am the coach

Coach score

Performance advice (87)

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.m.wikipedia.org/static/images/mobile/copyright/wikipedia-wordmark-en.svg
  • https://en.m.wikipedia.org/static/images/mobile/copyright/wikipedia-wordmark-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 15 CPU long tasks with the total of 2.197 s. The total blocking time is 1.383 s and 2 long tasks before first contentful paint with total time of 164 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
  • unknown
  • self
  • self
  • self
  • self
  • self
  • self
  • self
  • self
  • self
  • unknown
  • self
    • Avoid doing redirects (assetsRedirects)The page has 1 redirect. 1 request are from other domains, it could be 3rd-party assets doing unnecessary redirects. :(90
    Description: A redirect is one extra step for the user to download the asset. Avoid that if you want to be fast. Redirects are even more of a showstopper on mobile.
    Offenders:
  • https://meta.wikimedia.org/w/index.php...a.org/w/index.php
    • Avoid extra requests by setting cache headers (cacheHeaders)The page has 4 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 58.9 kB the next access.60
    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/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://meta.wikimedia.org/w/index.php...a.org/w/index.php
  • https://meta.m.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.m.wikipedia.org/w/load.php...ia.org/w/load.php
    • Always compress text content (compressAssets)The page has 1 request that are served uncompressed. You could save a lot of bytes by sending them compressed instead.90
    Description: In the early days of the Internet there were browsers that didn't support compressing (gzipping) text content. They do now. Make sure you compress HTML, JSON, JavaScript, CSS and SVG. It will save bytes for the user; making the page load faster and use less bandwith.
    Offenders:
    URLTransfer sizeContent size
    https://meta.m.wikimedia.org/w/index.php...a.org/w/index.php 2.5 KB4.1 KB
    Make each CSS response small (optimalCssSize)https://en.m.wikipedia.org/w/load.php?lang=en&modules=ext.cite.styles%7Cext.phonos.icons%2Cstyles%7Cext.relatedArticles.styles%7Cext.tmh.player.styles%7Cext.wikimediaBadges%7Cext.wikimediamessages.styles%7Cmediawiki.hlist%7Cmobile.init.styles%7Cskins.minerva.amc.styles%7Cskins.minerva.codex.styles%7Cskins.minerva.content.styles.images%7Cskins.minerva.icons%2Cstyles%7Cwikibase.client.init&only=styles&skin=minerva size is 21.2 kB (21175) 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.m.wikipedia.org/w/load.php...ia.org/w/load.php 20.7 KB153.0 KB

    Best practice advice (90)

    TitleAdviceScore
    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 7 responses that sets both a max-age and expires header. There are 12 responses that sets a server header. 81
    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.m.wikipedia.org/wiki/Barack_Obama
  • https://en.m.wikipedia.org/w/load.php...ia.org/w/load.php
  • https://en.m.wikipedia.org/w/load.php...ia.org/w/load.php
  • 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.m.wikipedia.org/w/load.php...ia.org/w/load.php
  • https://en.m.wikipedia.org/w/load.php...ia.org/w/load.php
  • https://en.m.wikipedia.org/w/load.php...ia.org/w/load.php
  • https://en.m.wikipedia.org/w/load.php...ia.org/w/load.php
  • https://en.m.wikipedia.org/w/load.php...ia.org/w/load.php
  • https://en.m.wikipedia.org/w/load.php...ia.org/w/load.php
  • https://en.m.wikipedia.org/w/load.php...ia.org/w/load.php
  • https://en.m.wikipedia.org/w/load.php...ia.org/w/load.php
  • https://en.m.wikipedia.org/w/load.php...ia.org/w/load.php
  • https://en.m.wikipedia.org/w/load.php...ia.org/w/load.php
  • https://en.m.wikipedia.org/w/load.php...ia.org/w/load.php
  • https://en.m.wikipedia.org/w/load.php...ia.org/w/load.php
  • https://meta.wikimedia.org/w/index.php...a.org/w/index.php
  • https://meta.m.wikimedia.org/w/index.php...a.org/w/index.php

    • 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.m.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.m.wikipedia.org/wiki/Barack_Obama

    • Page info

    Page info
    TitleBarack Obama - Wikipedia
    GeneratorMediaWiki 1.45.0-wmf.5
    Width361
    Height6843
    DOM elements13778
    Avg DOM depth14
    Max DOM depth23
    Iframes0
    Script tags7
    Local storage821.1 KB
    Session storage0 b
    Network Information API4g
    Resource Hints
    dns-prefetch
    https://meta.wikimedia.org/
    https://en.m.wikipedia.org/wiki/auth.wikimedia.org
    preconnect
    https://upload.wikimedia.org/

    Technologies used to build the page.

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

    TechnologyConfidenceCategory
    MediaWiki 100  Wikis
    PHP 100  Programming languages
    HSTS 100  Security
    | Browser metrics | Visual Metrics | Largest Contentful Paint | Cumulative Layout Shift | Long Aninimation Frames | Visual Elements | Metrics from CDP | Server timings | 

    Visual Metrics

    Visual Metrics
    First Visual Change534 ms
    Speed Index2.323 s
    Largest Image534 ms
    Heading3.500 s
    LargestContentfulPaint3.500 s
    Last Meaningful Paint3.500 s
    Largest Contentful Paint3.500 s
    Visual Complete 85%3.534 s
    Visual Complete 95%3.534 s
    Visual Complete 99%11.834 s
    Last Visual Change11.867 s
    Visual Readiness11.333 s

    Browser Metrics

    Navigation Timing
    backEndTime118 ms
    domContentLoadedTime1.565 s
    domInteractiveTime1.565 s
    domainLookupTime0 ms
    frontEndTime1.388 s
    pageDownloadTime207 ms
    pageLoadTime1.714 s
    redirectionTime0 ms
    serverConnectionTime0 ms
    serverResponseTime321 ms
    Google Web Vitals
    Time to first byte (TTFB)118 ms
    First Contentful Paint (FCP)516 ms
    Largest Contentful Paint (LCP)976 ms
    Total Blocking Time (TBT)1.383 s
    First Contentful Paint info
    Elements that needed recalculate style before FCP104
    Time spent in recalculate style before FCP53.36 ms
    Extra timings
    TTFB118 ms
    First Paint516 ms
    Load Event End1.714 s
    Fully loaded2.888 s
    User Timing marks
    mwStartup268 ms
    mwCentralNoticeBanner3.396 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 976 ms
    Element render delay858 ms
    TTFB118 ms
    Resource delay0 ms
    Resource load duration0 ms
    Elements that needed recalculate style before LCP417
    Time spent in recalculate style before LCP130.892 ms
    Load time0 ms
    Size (width*height)75492
    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

    No layout shift detected.

    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
    371.9 ms431.5 ms2.3 ms2.3 ms0 ms
    https://en.m.wikipedia.org/w/load.php?lang=en&modules=ext.cite.ux-enhancements%7Cext.phonos.init%7Cext.quicksurveys.init%2Clib%7Cext.relatedArticles.readMore.bootstrap%7Cext.scribunto.logs%7Cext.tmh.OgvJsSupport%2Cplayer%7Cjquery%7Cjquery.spinner%7Cjquery.spinner.styles%7Cmediawiki.page.media&skin=minerva&version=1h27f

    Forced Style And Layout Duration: 26 ms

    Invoker:  TimerHandler:setTimeout
    Invoker Type: user-callback
    Window attribution: self
    Source char position: 73872

    Blocking duration Work durationRender durationPreLayout DurationStyle And Layout Duration
    287.7 ms350.7 ms2.4 ms2.4 ms0 ms
    No availible script information.
    Blocking duration Work durationRender durationPreLayout DurationStyle And Layout Duration
    278.1 ms29.3 ms311.4 ms304.1 ms7.3 ms
    https://en.m.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.m.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=minerva

    Forced Style And Layout Duration: 24 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
    136.5 ms201.5 ms1.5 ms1.5 ms0 ms
    https://en.m.wikipedia.org/w/load.php?lang=en&modules=ext.cite.ux-enhancements%7Cext.phonos.init%7Cext.quicksurveys.init%2Clib%7Cext.relatedArticles.readMore.bootstrap%7Cext.scribunto.logs%7Cext.tmh.OgvJsSupport%2Cplayer%7Cjquery%7Cjquery.spinner%7Cjquery.spinner.styles%7Cmediawiki.page.media&skin=minerva&version=1h27f

    Forced Style And Layout Duration: 26 ms

    Invoker:  TimerHandler:setTimeout
    Invoker Type: user-callback
    Window attribution: self
    Source char position: 73872

    Blocking duration Work durationRender durationPreLayout DurationStyle And Layout Duration
    109.4 ms84.1 ms101.7 ms86.1 ms15.6 ms
    https://en.m.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.m.wikipedia.org/w/load.php?lang=en&modules=ext.cite.referencePreviews%7Cext.math.popup%7Cext.popups.main&skin=minerva&version=o338h

    Invoker:  https://en.m.wikipedia.org/w/load.php?lang=en&modules=ext.cite.referencePreviews%7Cext.math.popup%7Cext.popups.main&skin=minerva&version=o338h
    Invoker Type: classic-script
    Window attribution: self

    https://en.m.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
    103.3 ms103.9 ms49.5 ms37.1 ms12.4 ms
    https://en.m.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.m.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
    74 ms14 ms110.9 ms0 ms110.9 ms
    No availible script information.
    Blocking duration Work durationRender durationPreLayout DurationStyle And Layout Duration
    54.9 ms290 ms1 ms1 ms0 ms
    https://en.m.wikipedia.org/wiki/Barack_Obama

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

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

    Invoker:  https://en.m.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
    54.9 ms104.9 ms0 ms0 ms0 ms
    https://en.m.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
    43.8 ms93.8 ms0 ms0 ms0 ms
    No availible script information.

    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
    Documents60
    Frames36
    JSEventListeners714
    LayoutObjects1119
    MediaKeySessions0
    MediaKeys0
    Nodes31354
    Resources70
    ContextLifecycleStateObservers72
    V8PerContextDatas2
    WorkerGlobalScopes0
    UACSSResources3
    RTCPeerConnections0
    ResourceFetchers60
    AdSubframes0
    DetachedScriptStates0
    ArrayBufferContents2
    LayoutCount22
    RecalcStyleCount26
    LayoutDuration173
    RecalcStyleDuration355
    DevToolsCommandDuration391
    ScriptDuration1611
    V8CompileDuration9
    TaskDuration3966
    TaskOtherDuration1427
    ThreadTime14
    ProcessTime57
    JSHeapUsedSize11363688
    JSHeapTotalSize16105472
    FirstMeaningfulPaint973

    Visual Elements

    NameDisplay TimeX YWidthHeight
    LargestImage (wikipedia-wordmark-en.svg)534 ms 53 18 120 18
    <img src="/static/images/mobile/copyright/wikipedia-wordmark-en.svg" alt="Wikipedia" width="120" height="18" style="width: 7.5em; height: 1.125em;">
    Heading3.500 s 16 212 328 37
    <h1 id="firstHeading" class="firstHeading mw-first-heading"></h1>
    LargestContentfulPaint3.500 s 16 449 328 246
    <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 requests12
    Total domains4
    Total transfer size389.2 KB
    Total content size1.8 MB
    Responses missing compression5
    Number of cookies2
    Third party cookies0
    Requests per response code
    20011
    3021

    Largest assets on the page (by transfer size)

    URLTypeTransfer SizeContent Size
    https://en.m.wikiped...wiki/Barack_Obamahtml232.8 KB1.3 MB
    https://upload.wikim..._Barack_Obama.jpgimage50.8 KB49.9 KB
    https://en.m.wikiped...ia.org/w/load.phpjavascript49.2 KB169.2 KB
    https://en.m.wikiped...ia.org/w/load.phpjavascript24.5 KB116.6 KB
    https://en.m.wikiped...ia.org/w/load.phpcss20.7 KB153.0 KB
    https://upload.wikim...signature.svg.pngimage4.2 KB3.3 KB
    https://meta.m.wikim...a.org/w/index.phpjavascript2.5 KB4.1 KB
    https://en.m.wikiped...ia.org/w/load.phpsvg1.3 KB707 B
    https://en.m.wikiped...ia.org/w/load.phpsvg1.1 KB414 B
    https://en.m.wikiped...ia.org/w/load.phpsvg1.1 KB318 B
    https://en.m.wikiped...ia.org/w/load.phpsvg1.1 KB326 B
    https://meta.wikimed...a.org/w/index.phpotherN/A0 b

    Requests and sizes per content type

    ContentHeader SizeTransfer SizeContent SizeRequests
    html0 b232.8 KB1.3 MB1
    css0 b20.7 KB153.0 KB1
    javascript0 b76.2 KB289.9 KB3
    image0 b54.9 KB53.2 KB2
    svg0 b4.5 KB1.7 KB4
    Total0 b389.2 KB1.8 MB11

    Data per domain

    DomainTotal download timeTransfer SizeContent SizeRequests
    en.m.wikipedia.org1.161 s331.8 KB1.7 MB8
    upload.wikimedia.org382 ms54.9 KB53.2 KB2
    meta.wikimedia.org97 msN/A0 b1
    meta.m.wikimedia.org100 ms2.5 KB4.1 KB1

    Expires and last modified statistics

    typeminmedianmax
    Expires0 seconds2 weeks4 weeks
    Last modified8 minutes4 weeks24 weeks

    Console log

    The page logs the following messages to the console.

    LevelMessage
    INFO https://en.m.wikipedia.org/w/load.php?lang=en&modules=ext.centralNotice.bannerHistoryLogger%2CchoiceData%2Cdisplay%2CgeoIP%2CimpressionDiet%2CkvStore%2ClargeBannerLimit%2ClegacySupport%2CstartUp%7Cext.centralauth.ForeignApi%2Ccentralautologin%7Cext.checkUser.clientHints%7Cext.cx.entrypoints.languagesearcher.init%7Cext.cx.entrypoints.mffrequentlanguages%7Cext.cx.eventlogging.campaigns%7Cext.cx.model%7Cext.echo.centralauth%7Cext.eventLogging%2CnavigationTiming%2Cpopups%2CwikimediaEvents%2CxLab%7Cext.eventLogging.metricsPlatform%7Cext.growthExperiments.SuggestedEditSession%7Cext.urlShortener.toolbar%7Cjquery%2Coojs%2Csite%7Cjquery.client%7Cmediawiki.DateFormatter%2CForeignApi%2CString%2CTitle%2Capi%2Cbase%2Ccldr%2Ccookie%2Cexperiments%2CjqueryMsg%2Clanguage%2Crouter%2Cstorage%2Ctemplate%2Cuser%2Cutil%2CvisibleTimeout%7Cmediawiki.ForeignApi.core%7Cmediawiki.libs.pluralruleparser%7Cmediawiki.page.ready%7Cmediawiki.page.watch.ajax%7Cmediawiki.template.mustache%7Cmobile.codex.styles%7Cmobile.init%2Cstartup%7Cmobile.pagelist.styles%7Cmobile.pagesummary.styles%7Cmw.cx.SiteMapper%7Cmw.externalguidance.init%7Cskins.minerva.scripts&skin=minerva&version=15k9r 621:11006 "Hello friend! 🍦\n\nWikipedia is powered by MediaWiki. MediaWiki is open source software and we're always keen to hear from fellow developers about what you love (😍) or what we could be doing better (😱).\n\n💪 Or work for us @ https://wikimediafoundation.org/about/jobs/"
    INFO https://en.m.wikipedia.org/w/load.php?lang=en&modules=mobile.init&skin=minerva&version=18bk1 0:11006 "Hello friend! 🍦\n\nWikipedia is powered by MediaWiki. MediaWiki is open source software and we're always keen to hear from fellow developers about what you love (😍) or what we could be doing better (😱).\n\n💪 Or work for us @ https://wikimediafoundation.org/about/jobs/"

    Requests loaded after onLoad event

    Included requests done after load event end.

    ContentTransfer SizeRequests
    html0 b0
    css0 b0
    javascript27.1 KB2
    image0 b0
    font0 b0
    Total27.1 KB3

    Requests loaded after onContentLoad

    Includes requests done after DOM content loaded.

    ContentTransfer SizeRequests
    html0 b0
    css0 b0
    javascript27.1 KB2
    image0 b0
    font0 b0
    Total27.1 KB3

    Render blocking requests

    Render blocking information directly from Chrome.

    BlockingIn body parser blockingPotentially blocking
    100

    Render information

    URLType
    https://en.m.wikiped...ia.org/w/load.phpnon_blocking
    https://en.m.wikiped...ia.org/w/load.phpnon_blocking
    https://en.m.wikiped...ia.org/w/load.phpblocking
    https://meta.m.wikim...a.org/w/index.phpnon_blocking
    https://meta.wikimed...a.org/w/index.phpnon_blocking
    CPU Long Tasks | CPU Time Spent | CPU Time Spent Per Request | 

    CPU

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

    Download trace log

    Long Tasks

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

    TypeQuantityTotal duration (ms)
    Total Blocking Time 1383
    Max Potential First Input Delay 419
    Long Tasks before First Paint2164
    Long Tasks before First Contentful Paint2164
    Long Tasks before Largest Contentful Paint3287
    Long Tasks after Load Event End91436
    Total Long Tasks152197

    CPU last long task happened at 3.559 s

    Individual Long Tasks

    namestartTimedurationcontainerIdcontainerNamecontainerSrccontainerType
    self26763window
    unknown400101window
    unknown844123window
    unknown102378window
    self110761window
    self1311335window
    self1918103window
    self202252window
    self2128419window
    self257257window
    self2656109window
    self2795321window
    self3130185window
    unknown341186window
    self3559104window

    CPU time spent

    Calculated using Tracium.

    Categories (ms)
    parseHTML412
    styleLayout558
    paintCompositeRender90
    scriptParseCompile9
    scriptEvaluation1625
    garbageCollection37
    other1546
    Events (ms)
    FunctionCall1482
    RunTask687
    CpuProfiler::StartProfiling559
    ParseHTML383
    UpdateLayoutTree358
    Layout181
    DocumentLoader::BodyLoadingFinished91
    DecodedDataDocumentParser::AppendBytes70
    Paint55
    v8.run54
    PrePaint29
    DocumentLoader::CommitNavigation28
    PaintImage24
    V8.HandleInterrupts18
    Layerize17
    ParseAuthorStyleSheet17
    v8.produceCache16
    RunMicrotasks15
    DocumentLoader::InitializeWindow14
    DocumentLoader::BodyDataReceivedImpl14
    DocumentLoader::FinishedLoading13
    EventDispatch12
    V8.BytecodeBudgetInterrupt11
    V8.GC_MC_INCREMENTAL_EMBEDDER_TRACING10
    HTMLDocumentParser::MaybeFetchQueuedPreloads10

    Time spent per request

    URLCPU time (ms)
    https://en.m.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=minerva1654
    https://en.m.wikipedia.org/w/load.php?lang=en&modules=ext.cite.ux-enhancements%7Cext.phonos.init%7Cext.quicksurveys.init%2Clib%7Cext.relatedArticles.readMore.bootstrap%7Cext.scribunto.logs%7Cext.tmh.OgvJsSupport%2Cplayer%7Cjquery%7Cjquery.spinner%7Cjquery.spinner.styles%7Cmediawiki.page.media&skin=minerva&version=1h27f719
    https://en.m.wikipedia.org/wiki/Barack_Obama17
    https://meta.wikimedia.org/w/index.php?title=Special:BannerLoader&campaign=wle_2025_de&banner=wle_2025_de&uselang=en&debug=false13
    https://en.m.wikipedia.org/w/load.php?lang=en&modules=mediawiki.storage&skin=minerva&version=1ec1u10
    | afterPageCompleteCheck.jpg | layoutShift.jpg | largestContentfulPaint.jpg | 

    Screenshots

    afterPageCompleteCheck.jpg

    afterPageCompleteCheck.jpg

    layoutShift.jpg

    layoutShift.jpg

    largestContentfulPaint.jpg

    largestContentfulPaint.jpg