Page summary

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

Tested 2024-11-21 03:28:36 using Chrome 131.0.6778.69 (runtime settings).

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

Summary

MetricValue
Page metrics
Performance Score78
Total Page Transfer Size582.8 KB
Requests48
Timing metrics
TTFB [median]505 ms
First Paint [median]1.002 s
Fully Loaded [median]1.782 s
Google Web Vitals
TTFB [median]505 ms
First Contentful Paint (FCP) [median]1.002 s
Largest Contentful Paint (LCP) [median]1.002 s
Cumulative Layout Shift (CLS) [median]0.00
CPU metrics
CPU long tasks [median]1
CPU longest task duration247 ms
CPU last long task happens at680 ms
Visual Metrics
First Visual Change [median]1.000 s
Speed Index [median]1.009 s
Visual Complete 85% [median]1.000 s
Visual Complete 99% [median]1.133 s
Last Visual Change [median]1.433 s
Screenshot of run 4

Timings Summary

Metricminmedianmeanmax
Visual Metrics
FirstVisualChange966 ms1.000 s993 ms1.033 s
LastVisualChange1.233 s1.433 s1.400 s1.466 s
SpeedIndex977 ms1.009 s1.004 s1.046 s
LargestImage1.066 s1.066 s1.106 s1.233 s
Heading966 ms1.000 s993 ms1.033 s
LargestContentfulPaint966 ms1.000 s993 ms1.033 s
LastMeaningfulPaint1.066 s1.066 s1.106 s1.233 s
VisualReadiness200 ms466 ms407 ms467 ms
VisualComplete85966 ms1.000 s993 ms1.033 s
VisualComplete951.066 s1.066 s1.106 s1.233 s
VisualComplete991.100 s1.133 s1.180 s1.333 s
Google Web Vitals
Time To First Byte (TTFB)490 ms505 ms500 ms508 ms
Largest Contentful Paint (LCP)984 ms1.002 s1.002 s1.033 s
First Contentful Paint (FCP)984 ms1.002 s1.002 s1.033 s
Cumulative Layout Shift (CLS)0.00270.00270.00270.0027
More metrics
firstPaint984 ms1.002 s1.002 s1.033 s
loadEventEnd1.298 s1.314 s1.329 s1.411 s
User Timing
mwStartup668 ms955 ms900 ms968 ms
CPU
Total Blocking Time0 ms0 ms0 ms0 ms
Max Potential FID0 ms0 ms0 ms0 ms
CPU long tasks 1111
CPU last long task happens at663 ms680 ms688 ms737 ms
| Waterfall | | Download HAR | 

Waterfall

Run 4 SpeedIndex median

| Video | Download | 

Video

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| Filmstrip | 

Filmstrip

Use--filmstrip.showAll to show all filmstrips.

0 s
0.7 sCPU Long Task duration 238 ms
1 smwStartup 956 msDOM Content Loaded Time 967 msFirst Visual Change 1.000 sVisual Complete 85% 1.000 sHeading 1.000 s
1.1 sFirst Contentful Paint 1.002 sLCP <P> 1.002 sVisual Complete 95% 1.066 sLargest Image 1.066 s
1.2 sVisual Complete 99% 1.133 s
1.3 s
1.4 sPage Load Time 1.314 s
1.5 sLayout Shift 0.00069 1.411 sLast Visual Change 1.433 sLayout Shift 0.00203 1.459 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 (78)

TitleAdviceScore
Avoid slowing down the critical rendering path (avoidRenderBlocking)The page has 2 blocking requests and 0 in body parser blocking (0 JavaScript and 2 CSS). There are 1 potentially render blocking requests. You need to verify if it is render blocking: https://it.wikipedia.org/w/load.php?lang=it&modules=startup&only=scripts&raw=1&skin=vector99
Description: The critical rendering path is what the browser needs to do to start rendering the page. Every file requested inside of the head element will postpone the rendering of the page, because the browser need to do the request. Avoid loading JavaScript synchronously inside of the head (you should not need JavaScript to render the page), request files from the same domain as the main document (to avoid DNS lookups) and inline CSS for really fast rendering and a short rendering path.
Offenders:
  • https://it.wikipedia.org/w/load.php...ia.org/w/load.php
  • 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 1 CPU long task with the total of 238 ms. The total blocking time is 0 ms and 1 long task before first contentful paint with total time of 238 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.80
    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
  • Avoid doing redirects (assetsRedirects)The page has 1 redirect. 1 of the redirects are from the base domain, please fix them! 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://it.wikipedia.org/wiki/Special:CentralAutoLogin/start?type=script
  • Avoid extra requests by setting cache headers (cacheHeaders)The page has 25 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 108.1 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/commons/thumb/6/69/Screen_of_Facebook_%28...ebook_%282%29.PNG
  • https://upload.wikimedia.org/wikipedia/commons/thumb/e/ef/MarkZuckerberg.jpg/220...arkZuckerberg.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/b/bc/Nota_disambigua.svg/18...isambigua.svg.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/4/49/Sean_Parker.jpg/220px-Sean_Parker.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Emblem-important.svg/4...important.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/8/87/Magnifying_glass_icon_...icon_mgx2.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/f/f7/Social_networks.jpg/34...cial_networks.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/c/c5/Local-important.svg/40...important.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/c/ce/Old-Facebook-Logo.jpg/...Facebook-Logo.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/f/fd/Facebook-reversed.svg/...-reversed.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/8/87/Facebook_Logo_%282015%...%29_light.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/8/89/Facebook_Logo_%282019%...282019%29.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/f/fa/Wikiquote-logo.svg/18p...uote-logo.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/18px-Commons-logo.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/2/24/Wikinews-logo.svg/18px...news-logo.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/10px-Blue_pencil.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/7/7b/Meta_Platforms_Inc._lo...Inc._logo.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/7/70/Applications-internet....-internet.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/0/0f/People.svg/25px-People.svg.png
  • https://en.wikipedia.org/w/index.php...a.org/w/index.php
  • https://en.wikipedia.org/w/index.php...a.org/w/index.php
  • https://it.wikipedia.org/wiki/Special:CentralAutoLogin/start?type=script
  • https://login.wikimedia.org/wiki/Special:CentralAutoLogin/checkLoggedIn?wikiid=itwiki&type=script
  • 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://it.wikipedia.org/w/load.php...ia.org/w/load.php
  • https://it.wikipedia.org/w/load.php?lang=it&modules=startup&only=scripts&raw=1&skin=vector
  • https://it.wikipedia.org/w/load.php?lang=it&modules=site.styles&only=styles&skin=vector
  • Total JavaScript size shouldn't be too big (javascriptSize)The total JavaScript transfer size is 375.3 kB and the uncompressed size is 1.4 MB. This is totally crazy! There is really room for improvement here. 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://it.wikipedia.org/w/load.php?lang=it&modules=startup&only=scripts&raw=1&skin=vector 20.3 KB61.2 KB
    https://it.wikipedia.org/w/load.php...ia.org/w/load.php 2.6 KB4.0 KB
    https://it.wikipedia.org/w/load.php...ia.org/w/load.php 17.0 KB57.5 KB
    https://it.wikipedia.org/w/load.php...ia.org/w/load.php 178.7 KB663.8 KB
    https://it.wikipedia.org/w/load.php...ia.org/w/load.php 27.0 KB128.9 KB
    https://it.wikipedia.org/w/load.php...ia.org/w/load.php 1.3 KB994 B
    https://en.wikipedia.org/w/index.php...a.org/w/index.php 8.5 KB25.9 KB
    https://it.wikipedia.org/w/load.php...ia.org/w/load.php 109.8 KB441.6 KB
    https://login.wikimedia.org/wiki/Special:CentralAutoLogin/checkLoggedIn?wikiid=itwiki&type=script 1.2 KB252 B
    Make each CSS response small (optimalCssSize)https://it.wikipedia.org/w/load.php?lang=it&modules=codex-search-styles%7Cext.cite.styles%7Cext.uls.interlanguage%7Cext.visualEditor.desktopArticleTarget.noscript%7Cext.wikimediaBadges%7Cjquery.makeCollapsible.styles%7Cjquery.tablesorter.styles%7Cmediawiki.page.gallery.styles%7Cskins.vector.styles.legacy%7Cwikibase.client.init&only=styles&skin=vector size is 16.9 kB (16870) 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://it.wikipedia.org/w/load.php...ia.org/w/load.php 16.5 KB97.8 KB
    Don't use private headers on static content (privateAssets)The page has 5 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.60
    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://it.wikipedia.org/wiki/Facebook
  • https://en.wikipedia.org/w/index.php...a.org/w/index.php
  • https://en.wikipedia.org/w/index.php...a.org/w/index.php
  • https://it.wikipedia.org/wiki/Special:CentralAutoLogin/start?type=script
  • https://login.wikimedia.org/wiki/Special:CentralAutoLogin/checkLoggedIn?wikiid=itwiki&type=script
  • Best practice advice (89)

    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.
    Do not send too long headers (longHeaders)https://it.wikipedia...ia.org/w/load.php has a header sourcemap that is 958 characters long. 99
    Description: Do not send response headers that are too long.
    Offenders:
  • https://it.wikipedia.org/w/load.php...ia.org/w/load.php
  • Avoid unnecessary headers (unnecessaryHeaders)There are 12 responses that sets both a max-age and expires header. There are 48 responses that sets a server header. 40
    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://it.wikipedia.org/wiki/Facebook
  • https://it.wikipedia.org/w/load.php...ia.org/w/load.php
  • https://it.wikipedia.org/w/load.php...ia.org/w/load.php
  • https://it.wikipedia.org/w/load.php?lang=it&modules=startup&only=scripts&raw=1&skin=vector
  • https://it.wikipedia.org/w/load.php?lang=it&modules=startup&only=scripts&raw=1&skin=vector
  • https://it.wikipedia.org/w/load.php?lang=it&modules=site.styles&only=styles&skin=vector
  • https://it.wikipedia.org/w/load.php?lang=it&modules=site.styles&only=styles&skin=vector
  • https://upload.wikimedia.org/wikipedia/commons/thumb/6/69/Screen_of_Facebook_%28...ebook_%282%29.PNG
  • https://upload.wikimedia.org/wikipedia/commons/thumb/e/ef/MarkZuckerberg.jpg/220...arkZuckerberg.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/b/bc/Nota_disambigua.svg/18...isambigua.svg.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/4/49/Sean_Parker.jpg/220px-Sean_Parker.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Emblem-important.svg/4...important.svg.png
  • https://it.wikipedia.org/w/load.php...ia.org/w/load.php
  • https://it.wikipedia.org/w/load.php...ia.org/w/load.php
  • https://it.wikipedia.org/w/load.php...ia.org/w/load.php
  • https://it.wikipedia.org/w/load.php...ia.org/w/load.php
  • https://it.wikipedia.org/w/load.php...ia.org/w/load.php
  • https://it.wikipedia.org/w/load.php...ia.org/w/load.php
  • https://it.wikipedia.org/static/images/project-logos/itwiki.png
  • https://it.wikipedia.org/static/images/project-logos/itwiki.png
  • https://it.wikipedia.org/static/images/mobile/copyright/wikipedia-wordmark-en.svg
  • https://it.wikipedia.org/static/images/mobile/copyright/wikipedia-wordmark-en.svg
  • https://it.wikipedia.org/w/skins/Vector/resources/skins.vector.styles.legacy/ima...r-progressive.svg
  • https://it.wikipedia.org/w/resources/src/mediawiki.skinning/images/magnify-clip-ltr.svg?8330e
  • https://it.wikipedia.org/w/skins/Vector/resources/skins.vector.styles.legacy/ima...s/bullet-icon.svg
  • https://it.wikipedia.org/w/resources/src/jquery.tablesorter.styles/images/sort_both.svg?0e440
  • https://it.wikipedia.org/w/skins/Vector/resources/skins.vector.styles.legacy/ima...s/user-avatar.svg
  • https://it.wikipedia.org/w/skins/Vector/resources/skins.vector.styles.legacy/images/search.svg?a45d6
  • https://it.wikipedia.org/w/extensions/WikimediaBadges/resources/images/badge-silver-star.png?70a8c
  • https://it.wikipedia.org/w/extensions/Wikibase/client/resources/images/edit.svg?34bc5
  • https://upload.wikimedia.org/wikipedia/commons/thumb/8/87/Magnifying_glass_icon_...icon_mgx2.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/f/f7/Social_networks.jpg/34...cial_networks.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/c/c5/Local-important.svg/40...important.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/c/ce/Old-Facebook-Logo.jpg/...Facebook-Logo.jpg
  • https://upload.wikimedia.org/wikipedia/commons/thumb/f/fd/Facebook-reversed.svg/...-reversed.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/8/87/Facebook_Logo_%282015%...%29_light.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/8/89/Facebook_Logo_%282019%...282019%29.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/f/fa/Wikiquote-logo.svg/18p...uote-logo.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/18px-Commons-logo.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/2/24/Wikinews-logo.svg/18px...news-logo.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/10px-Blue_pencil.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/7/7b/Meta_Platforms_Inc._lo...Inc._logo.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/7/70/Applications-internet....-internet.svg.png
  • https://upload.wikimedia.org/wikipedia/commons/thumb/0/0f/People.svg/25px-People.svg.png
  • https://it.wikipedia.org/w/load.php...ia.org/w/load.php
  • https://it.wikipedia.org/w/load.php...ia.org/w/load.php
  • https://it.wikipedia.org/w/load.php...ia.org/w/load.php
  • https://it.wikipedia.org/w/load.php...ia.org/w/load.php
  • https://en.wikipedia.org/w/index.php...a.org/w/index.php
  • https://en.wikipedia.org/w/index.php...a.org/w/index.php
  • https://it.wikipedia.org/wiki/Special:CentralAutoLogin/start?type=script
  • https://it.wikipedia.org/w/extensions/UniversalLanguageSelector/resources/images...es/cog-sprite.svg
  • https://it.wikipedia.org/w/load.php...ia.org/w/load.php
  • https://it.wikipedia.org/w/load.php...ia.org/w/load.php
  • https://login.wikimedia.org/wiki/Special:CentralAutoLogin/checkLoggedIn?wikiid=itwiki&type=script
  • https://it.wikipedia.org/w/extensions/UniversalLanguageSelector/resources/images...nguage-base20.svg
  • https://it.wikipedia.org/static/favicon/wikipedia.ico
  • https://it.wikipedia.org/static/favicon/wikipedia.ico
  • 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://it.wikipedia.org/wiki/Facebook
  • 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://it.wikipedia.org/wiki/Facebook
  • Page info

    Page info
    TitleFacebook - Wikipedia
    GeneratorMediaWiki 1.44.0-wmf.3
    Width1904
    Height14201
    DOM elements5173
    Avg DOM depth10
    Max DOM depth19
    Iframes0
    Script tags5
    Local storage760.6 KB
    Session storage0 b
    Network Information API4g
    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 | Long Aninimation Frames | Visual Elements | Server timings | 

    Data from run 4

    Visual Metrics

    Browser Metrics

    Google Web Vitals
    Time to first byte (TTFB)505 ms
    First Contentful Paint (FCP)1.002 s
    Largest Contentful Paint (LCP)1.002 s
    Cumulative Layout Shift (CLS)0.00
    Total Blocking Time (TBT)0 ms
    First Contentful Paint info
    Elements that needed recalculate style before FCP5033
    Time spent in recalculate style before FCP63.934 ms
    Extra timings
    TTFB505 ms
    First Paint1.002 s
    Load Event End1.314 s
    Fully loaded1.780 s
    User Timing marks
    mwStartup956 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 1.002 s
    Elements that needed recalculate style before LCP5033
    Time spent in recalculate style before LCP63.934 ms
    Load time0 ms
    Size (width*height)114042
    DOM path
    div#content > div#bodyContent > div#mw-content-text > div:eq(0) > p:eq(4)> div#content > div#bodyContent > div#mw-content-text > div:eq(0) > p:eq(4)>
    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

    0.00272 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
    0.00203<li class="interlanguage-link interwiki-bar mw-list-item" style=""></li>,<li class="interlanguage-link interwiki-de mw-list-item" style=""></li>,<li class="interlanguage-link interwiki-en mw-list-item" style=""></li>,<li class="interlanguage-link interwiki-es mw-list-item" style=""></li>
    body > div#mw-navigation > div#mw-panel > nav#p-lang > div > ul > li:eq(15),body > div#mw-navigation > div#mw-panel > nav#p-lang > div > ul > li:eq(36),body > div#mw-navigation > div#mw-panel > nav#p-lang > div > ul > li:eq(43),body > div#mw-navigation > div#mw-panel > nav#p-lang > div > ul > li:eq(45)
    0.00069<nav id="p-coll-print_export" class="mw-portlet mw-portlet-coll-print_export vector-menu-portal portal vector-menu" aria-labelledby="p-coll-print_export-label"></nav>,<nav id="p-wikibase-otherprojects" class="mw-portlet mw-portlet-wikibase-otherprojects vector-menu-portal portal vector-menu" aria-labelledby="p-wikibase-otherprojects-label"></nav>,<nav id="p-lang" class="mw-portlet mw-portlet-lang vector-menu-portal portal vector-menu" aria-labelledby="p-lang-label"></nav>,<li id="t-cite" class="mw-list-item"></li>,<li id="t-urlshortener" class="mw-list-item"></li>
    body > div#mw-navigation > div#mw-panel > nav#p-coll-print_export,body > div#mw-navigation > div#mw-panel > nav#p-wikibase-otherprojects,body > div#mw-navigation > div#mw-panel > nav#p-lang,body > div#mw-navigation > div#mw-panel > nav#p-tb > div > ul > li#t-cite,body > div#mw-navigation > div#mw-panel > nav#p-tb > div > ul > li#t-urlshortener
    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
    195 ms172.1 ms237.9 ms0.1 ms237.8 ms
    No availible script information.
    Blocking duration Work durationRender durationPreLayout DurationStyle And Layout Duration
    0 ms37.7 ms12.3 ms9.1 ms3.2 ms
    https://it.wikipedia.org/w/load.php?lang=it&modules=startup&only=scripts&raw=1&skin=vector

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

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

    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
    0 ms30.4 ms24.6 ms15.7 ms8.9 ms
    https://it.wikipedia.org/w/load.php?lang=it&modules=ext.centralNotice.choiceData%2Cdisplay%2CgeoIP%2CimpressionDiet%2CkvStore%2CstartUp%7Cext.centralauth.centralautologin%7Cext.checkUser.clientHints%7Cext.cite.ux-enhancements%7Cext.cx.eventlogging.campaigns%7Cext.echo.centralauth%7Cext.eventLogging%2CnavigationTiming%2Cpopups%2CwikimediaEvents%7Cext.growthExperiments.SuggestedEditSession%7Cext.uls.common%2Ccompactlinks%2Cinterface%2Cpreferences%2Cwebfonts%7Cext.urlShortener.toolbar%7Cjquery%2Coojs%2Csite%7Cjquery.client%2CmakeCollapsible%2Ctablesorter%2CtextSelection%7Cjquery.uls.data%7Cmediawiki.String%2CTitle%2CUri%2Capi%2Cbase%2Ccldr%2Ccookie%2Cexperiments%2CjqueryMsg%2Clanguage%2Crouter%2Cstorage%2Ctoc%2Cuser%2Cutil%2CvisibleTimeout%7Cmediawiki.editfont.styles%7Cmediawiki.language.months%7Cmediawiki.libs.pluralruleparser%7Cmediawiki.page.media%2Cready%7Cmmv.bootstrap%2Ccodex%7Cskins.vector.legacy.js%7Cwikibase.sidebar.tracking&skin=vector&version=17ho7

    Forced Style And Layout Duration: 2 ms

    Invoker:  TimerHandler:setTimeout
    Invoker Type: user-callback
    Window attribution: self
    Source char position: 250582

    https://it.wikipedia.org/w/load.php?lang=it&modules=ext.centralNotice.choiceData%2Cdisplay%2CgeoIP%2CimpressionDiet%2CkvStore%2CstartUp%7Cext.centralauth.centralautologin%7Cext.checkUser.clientHints%7Cext.cite.ux-enhancements%7Cext.cx.eventlogging.campaigns%7Cext.echo.centralauth%7Cext.eventLogging%2CnavigationTiming%2Cpopups%2CwikimediaEvents%7Cext.growthExperiments.SuggestedEditSession%7Cext.uls.common%2Ccompactlinks%2Cinterface%2Cpreferences%2Cwebfonts%7Cext.urlShortener.toolbar%7Cjquery%2Coojs%2Csite%7Cjquery.client%2CmakeCollapsible%2Ctablesorter%2CtextSelection%7Cjquery.uls.data%7Cmediawiki.String%2CTitle%2CUri%2Capi%2Cbase%2Ccldr%2Ccookie%2Cexperiments%2CjqueryMsg%2Clanguage%2Crouter%2Cstorage%2Ctoc%2Cuser%2Cutil%2CvisibleTimeout%7Cmediawiki.editfont.styles%7Cmediawiki.language.months%7Cmediawiki.libs.pluralruleparser%7Cmediawiki.page.media%2Cready%7Cmmv.bootstrap%2Ccodex%7Cskins.vector.legacy.js%7Cwikibase.sidebar.tracking&skin=vector&version=17ho7

    Invoker:  TimerHandler:setTimeout
    Invoker Type: user-callback
    Window attribution: self
    Source char position: 250582

    https://it.wikipedia.org/w/load.php?lang=it&modules=ext.centralNotice.choiceData%2Cdisplay%2CgeoIP%2CimpressionDiet%2CkvStore%2CstartUp%7Cext.centralauth.centralautologin%7Cext.checkUser.clientHints%7Cext.cite.ux-enhancements%7Cext.cx.eventlogging.campaigns%7Cext.echo.centralauth%7Cext.eventLogging%2CnavigationTiming%2Cpopups%2CwikimediaEvents%7Cext.growthExperiments.SuggestedEditSession%7Cext.uls.common%2Ccompactlinks%2Cinterface%2Cpreferences%2Cwebfonts%7Cext.urlShortener.toolbar%7Cjquery%2Coojs%2Csite%7Cjquery.client%2CmakeCollapsible%2Ctablesorter%2CtextSelection%7Cjquery.uls.data%7Cmediawiki.String%2CTitle%2CUri%2Capi%2Cbase%2Ccldr%2Ccookie%2Cexperiments%2CjqueryMsg%2Clanguage%2Crouter%2Cstorage%2Ctoc%2Cuser%2Cutil%2CvisibleTimeout%7Cmediawiki.editfont.styles%7Cmediawiki.language.months%7Cmediawiki.libs.pluralruleparser%7Cmediawiki.page.media%2Cready%7Cmmv.bootstrap%2Ccodex%7Cskins.vector.legacy.js%7Cwikibase.sidebar.tracking&skin=vector&version=17ho7

    Invoker:  TimerHandler:setTimeout
    Invoker Type: user-callback
    Window attribution: self
    Source char position: 250582

    Blocking duration Work durationRender durationPreLayout DurationStyle And Layout Duration
    0 ms22.5 ms30.5 ms27.4 ms3.1 ms
    https://it.wikipedia.org/w/load.php?lang=it&modules=startup&only=scripts&raw=1&skin=vector

    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.

    Visual Elements

    NameDisplay TimeX YWidthHeight
    LargestImage (260px-Screen_of_Facebook_%282%29.PNG)1.066 s 1610 377 260 140
    <img alt="Schermata di esempio" src="//upload.wikimedia.org/wikipedia/commons/thumb/6/69/Screen_of_Facebook_%282%29.PNG/260px-Screen_of_Facebook_%282%29.PNG" decoding="async" width="260" height="140" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/69/Screen_of_Facebook_%282%29.PNG/390px-Screen_of_Facebook_%282%29.PNG 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/69/Screen_of_Facebook_%282%29.PNG/520px-Screen_of_Facebook_%282%29.PNG 2x" data-file-width="1600" data-file-height="859">
    Heading1.000 s 201 100 1679 41
    <h1 id="firstHeading" class="firstHeading mw-first-heading"></h1>
    LargestContentfulPaint1.000 s 201 360 1679 90
    <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 requests48
    Total domains4
    Total transfer size582.8 KB
    Total content size1.9 MB
    Responses missing compression12
    Number of cookies3
    Third party cookies0
    Requests per response code
    20047
    3021

    Largest assets on the page (by transfer size)

    Requests and sizes per content type

    ContentHeader SizeTransfer SizeContent SizeRequests
    html0 b78.2 KB375.6 KB1
    css0 b21.7 KB109.5 KB3
    javascript0 b366.5 KB1.4 MB9
    image0 b102.4 KB83.0 KB23
    svg0 b12.3 KB9.2 KB10
    favicon0 b1.7 KB2.7 KB1
    Total0 b582.8 KB1.9 MB47

    Data per domain

    DomainTotal download timeTransfer SizeContent SizeRequests
    it.wikipedia.org5.312 s477.3 KB1.8 MB24
    upload.wikimedia.org7.096 s93.1 KB75.1 KB21
    en.wikipedia.org582 ms11.3 KB31.5 KB2
    login.wikimedia.org139 ms1.2 KB252 B1

    Expires and last modified statistics

    typeminmedianmax
    Expires0 seconds0 seconds1 year
    Last modified1 day19 weeks11 years

    Requests loaded after onLoad event

    Included requests done after load event end.

    ContentTransfer SizeRequests
    html0 b0
    css0 b0
    javascript0 b0
    image0 b0
    font0 b0
    svg1.2 KB1
    favicon1.7 KB1
    Total2.9 KB2

    Requests loaded after onContentLoad

    Includes requests done after DOM content loaded.

    ContentTransfer SizeRequests
    html0 b0
    css2.8 KB1
    javascript147.9 KB5
    image0 b0
    font0 b0
    svg2.4 KB2
    favicon1.7 KB1
    Total154.9 KB10

    Render blocking requests

    Render blocking information directly from Chrome.

    BlockingIn body parser blockingPotentially blocking
    201

    Render information

    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.

    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 0
    Max Potential First Input Delay 0
    Long Tasks before First Paint1238
    Long Tasks before First Contentful Paint1238
    Long Tasks before Largest Contentful Paint1238
    Long Tasks after Load Event End00
    Total Long Tasks1238

    CPU last long task happened at 680 ms

    Individual Long Tasks

    namestartTimedurationcontainerIdcontainerNamecontainerSrccontainerType
    unknown680238window

    CPU time spent

    Calculated using Tracium.

    Categories (ms)
    parseHTML25
    styleLayout287
    paintCompositeRender26
    scriptParseCompile3
    scriptEvaluation188
    garbageCollection9
    other151
    Events (ms)
    Layout174
    FunctionCall155
    UpdateLayoutTree113
    RunTask92
    Paint23
    PrePaint22
    ParseHTML22
    v8.run18
    CpuProfiler::StartProfiling13

    Time spent per request

    URLCPU time (ms)
    https://it.wikipedia.org/w/load.php?lang=it&modules=startup&only=scripts&raw=1&skin=vector175
    https://it.wikipedia.org/w/load.php?lang=it&modules=ext.centralNotice.choiceData%2Cdisplay%2CgeoIP%2CimpressionDiet%2CkvStore%2CstartUp%7Cext.centralauth.centralautologin%7Cext.checkUser.clientHints%7Cext.cite.ux-enhancements%7Cext.cx.eventlogging.campaigns%7Cext.echo.centralauth%7Cext.eventLogging%2CnavigationTiming%2Cpopups%2CwikimediaEvents%7Cext.growthExperiments.SuggestedEditSession%7Cext.uls.common%2Ccompactlinks%2Cinterface%2Cpreferences%2Cwebfonts%7Cext.urlShortener.toolbar%7Cjquery%2Coojs%2Csite%7Cjquery.client%2CmakeCollapsible%2Ctablesorter%2CtextSelection%7Cjquery.uls.data%7Cmediawiki.String%2CTitle%2CUri%2Capi%2Cbase%2Ccldr%2Ccookie%2Cexperiments%2CjqueryMsg%2Clanguage%2Crouter%2Cstorage%2Ctoc%2Cuser%2Cutil%2CvisibleTimeout%7Cmediawiki.editfont.styles%7Cmediawiki.language.months%7Cmediawiki.libs.pluralruleparser%7Cmediawiki.page.media%2Cready%7Cmmv.bootstrap%2Ccodex%7Cskins.vector.legacy.js%7Cwikibase.sidebar.tracking&skin=vector&version=17ho772