Page summary

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

Tested 2025-01-17 22:39:02 using Chrome 131.0.6778.85 (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

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

Summary

MetricValue
Page metrics
Performance Score91
Total Page Transfer Size393.5 KB
Requests11
Timing metrics
TTFB [median]120 ms
First Paint [median]633 ms
Fully Loaded [median]2.084 s
Google Web Vitals
TTFB [median]120 ms
First Contentful Paint (FCP) [median]633 ms
Largest Contentful Paint (LCP) [median]1.067 s
Cumulative Layout Shift (CLS) [median]0.00
Interaction To Next Paint (INP) [median]212 ms
Total Blocking Time [median]1.400 s
Max Potential FID [median]404 ms
CPU metrics
CPU long tasks [median]12
CPU longest task duration501 ms
CPU last long task happens at3.457 s
Visual Metrics
First Visual Change [median]666 ms
Speed Index [median]1.009 s
Visual Complete 85% [median]1.066 s
Visual Complete 99% [median]3.000 s
Last Visual Change [median]3.300 s
Screenshot of run 2

Timings Summary

Metricminmedianmeanmax
Visual Metrics
FirstVisualChange533 ms666 ms688 ms866 ms
LastVisualChange3.233 s3.300 s3.311 s3.400 s
SpeedIndex779 ms1.009 s1.050 s1.363 s
Heading533 ms666 ms688 ms866 ms
LargestContentfulPaint2.633 s3.000 s2.966 s3.266 s
LastMeaningfulPaint2.633 s3.000 s2.966 s3.266 s
VisualReadiness2.434 s2.567 s2.623 s2.867 s
VisualComplete85666 ms1.066 s1.066 s1.466 s
VisualComplete951.033 s1.433 s1.400 s1.733 s
VisualComplete992.633 s3.000 s2.978 s3.300 s
Google Web Vitals
Time To First Byte (TTFB)117 ms120 ms119 ms121 ms
Largest Contentful Paint (LCP)633 ms1.067 s1.048 s1.444 s
First Contentful Paint (FCP)529 ms633 ms671 ms852 ms
Cumulative Layout Shift (CLS)0000
More metrics
firstPaint529 ms633 ms671 ms852 ms
loadEventEnd1.736 s1.818 s2.012 s2.483 s
User Timing
mwStartup281 ms294 ms290 ms296 ms
CPU
Total Blocking Time1.224 s1.400 s1.356 s1.444 s
Max Potential FID370 ms404 ms425 ms501 ms
CPU long tasks 12121213
CPU last long task happens at3.300 s3.457 s3.410 s3.472 s
Download videoDownload timelineDownload HARDownload Console Logs
| Waterfall | | Download HAR | 

Waterfall

Run 2 SpeedIndex median

Download HARCompare
| Video | Download | 

Video

Download video
| Filmstrip | 

Filmstrip

Use--filmstrip.showAll to show all filmstrips.

0 s
0.3 sCPU Long Task duration 53 msmwStartup 281 ms
0.5 sCPU Long Task duration 101 ms
0.6 sFirst Contentful Paint 529 msFirst Visual Change 533 msHeading 533 ms
0.7 s
0.8 s
0.9 s
1 sCPU Long Task duration 132 ms
1.1 sVisual Complete 85% 1.066 sLCP <P> 1.067 sCPU Long Task duration 62 ms
1.2 sCPU Long Task duration 80 ms
1.3 s
1.4 sCPU Long Task duration 404 ms
1.5 sVisual Complete 95% 1.433 s
1.6 s
1.7 sDOM Content Loaded Time 1.694 s
1.8 s
1.9 sPage Load Time 1.818 s
2 sCPU Long Task duration 58 ms
2.1 sCPU Long Task duration 125 ms
2.2 sFully Loaded 2.185 s
2.3 sCPU Long Task duration 351 ms
2.7 sCPU Long Task duration 124 ms
2.9 sCPU Long Task duration 322 ms
3 sVisual Complete 99% 3.000 s
3.1 s
3.2 sCPU Long Task duration 203 ms
3.3 s
3.4 sLast Visual Change 3.400 s
3.5 sCPU Long Task duration 89 ms
| 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 (91)

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 12 CPU long tasks with the total of 1.949 s. The total blocking time is 1.224 s and 2 long tasks before first contentful paint with total time of 225 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
    • Avoid extra requests by setting cache headers (cacheHeaders)The page has 2 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 47.7 kB the next access.80
    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
    • Long cache headers is good (cacheHeadersLong)The page has 2 requests that have a shorter cache time than 30 days (but still a cache time).98
    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
  • https://en.m.wikipedia.org/w/load.php?lang=en&modules=site.styles&only=styles&skin=minerva
    • 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 18.5 kB (18500) 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 18.1 KB129.6 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 8 responses that sets both a max-age and expires header. There are 11 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?lang=en&modules=site.styles&only=styles&skin=minerva
  • https://en.m.wikipedia.org/w/load.php?lang=en&modules=site.styles&only=styles&skin=minerva
  • 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

    • 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 1.44.0-wmf.12
    Width360
    Height6505
    DOM elements13724
    Avg DOM depth14
    Max DOM depth23
    Iframes0
    Script tags7
    Local storage688.0 KB
    Session storage0 b
    Network Information API4g
    Resource Hints
    dns-prefetch
    https://meta.wikimedia.org/
    https://en.m.wikipedia.org/wiki/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 9.2.6100  Web servers
    HSTS 100  Security
    | Browser metrics | Visual Metrics | Largest Contentful Paint | Cumulative Layout Shift | Long Aninimation Frames | Visual Elements | Server timings | 

    Data from run 2

    Visual Metrics

    Visual Metrics
    First Visual Change533 ms
    Speed Index1.009 s
    Heading533 ms
    LargestContentfulPaint3.000 s
    Last Meaningful Paint3.000 s
    Largest Contentful Paint3.000 s
    Visual Complete 85%1.066 s
    Visual Complete 95%1.433 s
    Visual Complete 99%3.000 s
    Last Visual Change3.400 s
    Visual Readiness2.867 s

    Browser Metrics

    Navigation Timing
    backEndTime120 ms
    domContentLoadedTime1.694 s
    domInteractiveTime1.694 s
    domainLookupTime0 ms
    frontEndTime1.493 s
    pageDownloadTime205 ms
    pageLoadTime1.818 s
    redirectionTime0 ms
    serverConnectionTime0 ms
    serverResponseTime320 ms
    Google Web Vitals
    Time to first byte (TTFB)120 ms
    First Contentful Paint (FCP)529 ms
    Largest Contentful Paint (LCP)1.067 s
    Total Blocking Time (TBT)1.400 s
    First Contentful Paint info
    Elements that needed recalculate style before FCP101
    Time spent in recalculate style before FCP69.981 ms
    Extra timings
    TTFB120 ms
    First Paint529 ms
    Load Event End1.818 s
    Fully loaded2.185 s
    User Timing marks
    mwStartup281 ms

    Largest Contentful Paint

    When in time the page main content is rendered (collected using the Largest Contentful Paint API). Read more about Largest Contentful Paint.

    Element typeP
    Element/tag<p></p>
    Render time 1.067 s
    Elements that needed recalculate style before LCP413
    Time spent in recalculate style before LCP142.577 ms
    Load time0 ms
    Size (width*height)75958
    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
    388 ms437.2 ms32.8 ms2.6 ms30.2 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

    Blocking duration Work durationRender durationPreLayout DurationStyle And Layout Duration
    310 ms364.8 ms9.2 ms3.5 ms5.7 ms
    https://en.m.wikipedia.org/w/load.php?lang=en&modules=ext.cite.ux-enhancements%7Cext.phonos.init%7Cext.relatedArticles.readMore.bootstrap%7Cext.scribunto.logs%7Cext.tmh.OgvJsSupport%2Cplayer%7Cjquery%7Cmediawiki.page.media%7Cmobile.startup&skin=minerva&version=sc86c

    Invoker:  TimerHandler:setTimeout
    Invoker Type: user-callback
    Window attribution: self
    Source char position: 63813

    https://en.m.wikipedia.org/w/load.php?lang=en&modules=ext.cite.ux-enhancements%7Cext.phonos.init%7Cext.relatedArticles.readMore.bootstrap%7Cext.scribunto.logs%7Cext.tmh.OgvJsSupport%2Cplayer%7Cjquery%7Cmediawiki.page.media%7Cmobile.startup&skin=minerva&version=sc86c

    Forced Style And Layout Duration: 22 ms

    Invoker:  TimerHandler:setTimeout
    Invoker Type: user-callback
    Window attribution: self
    Source char position: 63813

    Blocking duration Work durationRender durationPreLayout DurationStyle And Layout Duration
    298 ms34.1 ms321.9 ms311 ms10.9 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: 4310

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

    Forced Style And Layout Duration: 23 ms

    Invoker:  FrameRequestCallback
    Invoker Type: user-callback
    Source Function Name:  flushCssBuffer
    Window attribution: self
    Source char position: 3233

    Blocking duration Work durationRender durationPreLayout DurationStyle And Layout Duration
    160 ms218.2 ms6.8 ms3.8 ms3 ms
    https://en.m.wikipedia.org/w/load.php?lang=en&modules=ext.cite.ux-enhancements%7Cext.phonos.init%7Cext.relatedArticles.readMore.bootstrap%7Cext.scribunto.logs%7Cext.tmh.OgvJsSupport%2Cplayer%7Cjquery%7Cmediawiki.page.media%7Cmobile.startup&skin=minerva&version=sc86c

    Forced Style And Layout Duration: 26 ms

    Invoker:  TimerHandler:setTimeout
    Invoker Type: user-callback
    Window attribution: self
    Source char position: 63813

    Blocking duration Work durationRender durationPreLayout DurationStyle And Layout Duration
    118 ms126.7 ms42.3 ms31.3 ms11 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: 4310

    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: 3233

    Blocking duration Work durationRender durationPreLayout DurationStyle And Layout Duration
    101 ms53.6 ms123.4 ms106.8 ms16.6 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: 4310

    https://en.m.wikipedia.org/w/load.php?lang=en&modules=ext.centralauth.ForeignApi%7Cext.cite.referencePreviews%7Cext.math.popup%7Cext.popups.main%7Cmediawiki.ForeignApi%7Cmediawiki.ForeignApi.core&skin=minerva&version=fjkj8

    Invoker:  https://en.m.wikipedia.org/w/load.php?lang=en&modules=ext.centralauth.ForeignApi%7Cext.cite.referencePreviews%7Cext.math.popup%7Cext.popups.main%7Cmediawiki.ForeignApi%7Cmediawiki.ForeignApi.core&skin=minerva&version=fjkj8
    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: 3233

    Blocking duration Work durationRender durationPreLayout DurationStyle And Layout Duration
    92 ms34.1 ms128.9 ms0 ms128.9 ms
    https://en.m.wikipedia.org/w/load.php?lang=en&modules=ext.cite.ux-enhancements%7Cext.phonos.init%7Cext.relatedArticles.readMore.bootstrap%7Cext.scribunto.logs%7Cext.tmh.OgvJsSupport%2Cplayer%7Cjquery%7Cmediawiki.page.media%7Cmobile.startup&skin=minerva&version=sc86c

    Invoker:  https://en.m.wikipedia.org/w/load.php?lang=en&modules=ext.cite.ux-enhancements%7Cext.phonos.init%7Cext.relatedArticles.readMore.bootstrap%7Cext.scribunto.logs%7Cext.tmh.OgvJsSupport%2Cplayer%7Cjquery%7Cmediawiki.page.media%7Cmobile.startup&skin=minerva&version=sc86c
    Invoker Type: classic-script
    Window attribution: self

    Blocking duration Work durationRender durationPreLayout DurationStyle And Layout Duration
    92 ms100.3 ms79.7 ms63.5 ms16.2 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: 4310

    Blocking duration Work durationRender durationPreLayout DurationStyle And Layout Duration
    53 ms300.6 ms6.4 ms0.6 ms5.8 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
    48 ms98 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.

    Visual Elements

    NameDisplay TimeX YWidthHeight
    LargestImage (220px-President_Barack_Obama.jpg) 70 620 220 275
    <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">
    Heading533 ms 16 75 328 37
    <h1 id="firstHeading" class="firstHeading mw-first-heading"></h1>
    LargestContentfulPaint3.000 s 16 308 328 246
    <p></p>
    | Summary  | Largest responses  | Requests and sizes per content type  | Data per domain | Expires and last modified statistics  | Requests loaded after onLoad event  | Render blocking requests  | 

    PageXray

    How the page is built.

    Summary
    HTTP versionHTTP/2.0
    Total requests11
    Total domains2
    Total transfer size393.5 KB
    Total content size1.8 MB
    Responses missing compression4
    Number of cookies1
    Third party cookies0
    Requests per response code
    20011

    Largest assets on the page (by transfer size)

    URLTypeTransfer SizeContent Size
    https://en.m.wikiped...wiki/Barack_Obamahtml229.3 KB1.3 MB
    https://en.m.wikiped...ia.org/w/load.phpjavascript67.5 KB254.6 KB
    https://upload.wikim..._Barack_Obama.jpgimage43.4 KB42.5 KB
    https://en.m.wikiped...ia.org/w/load.phpjavascript26.9 KB126.6 KB
    https://en.m.wikiped...ia.org/w/load.phpcss18.1 KB129.6 KB
    https://upload.wikim...signature.svg.pngimage3.2 KB2.4 KB
    https://en.m.wikiped...ia.org/w/load.phpsvg1.2 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.phpsvg1.0 KB326 B
    https://en.m.wikiped...ia.org/w/load.phpcss755 B1.8 KB

    Requests and sizes per content type

    ContentHeader SizeTransfer SizeContent SizeRequests
    html0 b229.3 KB1.3 MB1
    css0 b18.8 KB131.4 KB2
    javascript0 b94.4 KB381.3 KB2
    image0 b46.6 KB44.9 KB2
    svg0 b4.4 KB1.7 KB4
    Total0 b393.5 KB1.8 MB11

    Data per domain

    DomainTotal download timeTransfer SizeContent SizeRequests
    en.m.wikipedia.org1.271 s347.0 KB1.8 MB9
    upload.wikimedia.org325 ms46.6 KB44.9 KB2

    Expires and last modified statistics

    typeminmedianmax
    Expires0 seconds4 weeks4 weeks
    Last modified3 minutes5 weeks6 years

    Requests loaded after onLoad event

    Included requests done after load event end.

    ContentTransfer SizeRequests
    html0 b0
    css0 b0
    javascript26.9 KB1
    image0 b0
    font0 b0
    Total26.9 KB1

    Requests loaded after onContentLoad

    Includes requests done after DOM content loaded.

    ContentTransfer SizeRequests
    html0 b0
    css0 b0
    javascript26.9 KB1
    image0 b0
    font0 b0
    Total26.9 KB1

    Render blocking requests

    Render blocking information directly from Chrome.

    BlockingIn body parser blockingPotentially blocking
    200

    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://en.m.wikiped...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 1400
    Max Potential First Input Delay 404
    Long Tasks before First Paint2154
    Long Tasks before First Contentful Paint2154
    Long Tasks before Largest Contentful Paint3286
    Long Tasks after Load Event End71272
    Total Long Tasks132104

    CPU last long task happened at 3.472 s

    Individual Long Tasks

    namestartTimedurationcontainerIdcontainerNamecontainerSrccontainerType
    self27953window
    unknown430101window
    unknown924132window
    self108462window
    unknown115980window
    self1357404window
    self197158window
    self2029125window
    self2252351window
    self2674124window
    self2833322window
    self3168203window
    self347289window

    CPU time spent

    Calculated using Tracium.

    Categories (ms)
    parseHTML497
    styleLayout496
    paintCompositeRender49
    scriptParseCompile10
    scriptEvaluation1567
    garbageCollection123
    other1719
    Events (ms)
    FunctionCall1433
    CpuProfiler::StartProfiling696
    RunTask685
    ParseHTML469
    UpdateLayoutTree325
    Layout154
    DocumentLoader::BodyLoadingFinished94
    DecodedDataDocumentParser::AppendBytes71
    V8.GC_HEAP_EMBEDDER_TRACING_EPILOGUE61
    v8.run44
    DocumentLoader::CommitNavigation29
    Paint29
    PrePaint23
    Commit22
    DocumentLoader::BodyDataReceivedImpl19
    ParseAuthorStyleSheet19
    RunMicrotasks18
    Layerize18
    v8.produceCache16
    V8.GC_MC_INCREMENTAL_EMBEDDER_TRACING16
    V8.HandleInterrupts16
    PaintImage13
    v8.compile10

    Time spent per request

    URLCPU time (ms)
    https://en.m.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=minerva1617
    https://en.m.wikipedia.org/w/load.php?lang=en&modules=ext.cite.ux-enhancements%7Cext.phonos.init%7Cext.relatedArticles.readMore.bootstrap%7Cext.scribunto.logs%7Cext.tmh.OgvJsSupport%2Cplayer%7Cjquery%7Cmediawiki.page.media%7Cmobile.startup&skin=minerva&version=sc86c654
    https://en.m.wikipedia.org/wiki/Barack_Obama31