Page summary

Summary

Metric	Value
Page metrics
Performance Score	81
Total Page Transfer Size	584.0 KB
Requests	45
Timing metrics
TTFB [median]	436 ms
First Paint [median]	787 ms
Fully Loaded [median]	1.409 s
Google Web Vitals
TTFB [median]	436 ms
First Contentful Paint (FCP) [median]	788 ms
Largest Contentful Paint (LCP) [median]	788 ms
Visual Metrics
First Visual Change [median]	833 ms
Speed Index [median]	1.326 s
Visual Complete 85% [median]	1.600 s
Visual Complete 99% [median]	9.166 s
Last Visual Change [median]	9.900 s

Timings Summary

Waterfall

Run 1 SpeedIndex median

Video

Filmstrip

Use--filmstrip.showAll to show all filmstrips.

0 s

0.6 smwStartup 553 ms

0.8 sFirst Contentful Paint 788 msLCP <P> 788 ms

0.9 sFirst Visual Change 833 ms

1 s

1.1 s

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1.3 sDOM Content Loaded Time 1.286 s

1.4 s

1.5 sFully Loaded 1.409 sPage Load Time 1.411 smwCentralNoticeBanner 1.500 s

1.6 sVisual Complete 85% 1.600 sVisual Complete 95% 1.600 sLargest Image 1.600 sHeading 1.600 s

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9.2 sVisual Complete 99% 9.166 s

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9.9 sLast Visual Change 9.900 s

Coach

The coach helps you find performance problems on your web page using web performance best practice rules. And gives you advice on privacy and best practices. Tested using Coach-core version 8.1.3.

Coach score

• Total score 84
• Performance score 81
• Privacy score 94
• Best practice score 73

Performance advice (81)

Show/hide details

Title	Advice	Score
Avoid slowing down the critical rendering path (avoidRenderBlocking)	The style https://en.wikipedia.org/w/load.php?lang=en&modules=ext.chart.styles%7Cext.cite.styles%7Cext.echo.styles.alert%2Cbadge%7Cext.personalDashboard.menuIcon%7Cext.uls.interlanguage%7Cext.visualEditor.desktopArticleTarget.noscript%7Cext.wikimediaBadges%7Cext.wikimediamessages.styles%7Cjquery.makeCollapsible.styles%7Cmediawiki.codex.messagebox.styles%7Cmediawiki.page.gallery.styles%7Coojs-ui.styles.icons-alerts%7Cskins.vector.icons%2Cstyles%7Cskins.vector.search.codex.styles%7Cwikibase.client.init&only=styles&skin=vector-2022 is larger than the magic number TCP window size 14.5 kB. Make the file smaller and the page will render faster. The page has 1 render blocking CSS request and 0 blocking JavaScript request inside of head.	95
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://en.wikipedia.org/w/load.php...ia.org/w/load.php
Don't scale images in the browser (avoidScalingImages)	The page has 3 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.	70
Description: It's easy to scale images in the browser and make sure they look good in different devices, however that is bad for performance! Scaling images in the browser takes extra CPU time and will hurt performance on mobile. And the user will download extra kilobytes (sometimes megabytes) of data that could be avoided. Don't do that, make sure you create multiple version of the same image server-side and serve the appropriate one.
Offenders: https://en.wikipedia.org/static/images/mobile/copyright/wikipedia-wordmark-en-25.svg https://en.wikipedia.org/static/images/mobile/copyright/wikipedia-tagline-en-25.svg https://upload.wikimedia.org/wikipedia/commons/thumb/5/5d/Population_pyramid_of_..._users_by_age.png
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 extra requests by setting cache headers (cacheHeaders)	The page has 35 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 319.3 kB the next access.	0
Description: The easiest way to make your page fast is to avoid doing requests to the server. Setting a cache header on your server response will tell the browser that it doesn't need to download the asset again during the configured cache time! Always try to set a cache time if the content doesn't change for every request.
Offenders: https://upload.wikimedia.org/wikipedia/en/thumb/1/1b/Semi-protection-shackle.svg...n-shackle.svg.png https://upload.wikimedia.org/wikipedia/commons/thumb/b/b9/2023_Facebook_icon.svg...book_icon.svg.png https://upload.wikimedia.org/wikipedia/commons/thumb/9/93/Facebook_logo_%282023%...282023%29.svg.png https://upload.wikimedia.org/wikipedia/en/6/64/Facebook_user_page.png https://upload.wikimedia.org/wikipedia/commons/thumb/b/b0/Increase2.svg/20px-Increase2.svg.png https://upload.wikimedia.org/wikipedia/commons/thumb/0/05/Meta_Platforms_Inc._lo...ropped%29.svg.png https://upload.wikimedia.org/wikipedia/commons/3/38/Facebook_Like_React.png https://upload.wikimedia.org/wikipedia/commons/thumb/f/fc/MarkZuckerberg-crop.jp...ckerberg-crop.jpg https://upload.wikimedia.org/wikipedia/en/thumb/1/12/Original-facebook.jpg/250px...inal-facebook.jpg https://upload.wikimedia.org/wikipedia/commons/thumb/0/06/Facebook.svg/250px-Facebook.svg.png https://upload.wikimedia.org/wikipedia/commons/thumb/6/69/Screen_of_Facebook_%28...ebook_%282%29.PNG https://upload.wikimedia.org/wikipedia/commons/thumb/f/f4/Facebook_t-shirt_with_...d_for_Hackers.jpg https://upload.wikimedia.org/wikipedia/commons/thumb/5/5d/Population_pyramid_of_..._users_by_age.png https://upload.wikimedia.org/wikipedia/commons/thumb/9/9c/Facebook_censorship.sv...ensorship.svg.png https://upload.wikimedia.org/wikipedia/commons/thumb/f/f3/PRISM_Collection_Detai...ction_Details.jpg https://upload.wikimedia.org/wikipedia/commons/thumb/6/62/Onavo_logo.png/250px-Onavo_logo.png https://upload.wikimedia.org/wikipedia/commons/thumb/2/26/Hands_Off%21_protest%2...5%2C_2025-053.jpg https://upload.wikimedia.org/wikipedia/commons/thumb/c/c9/Berlin_%289163009052%2...9163009052%29.jpg https://upload.wikimedia.org/wikipedia/commons/thumb/6/61/Ad-tech_London_2010_%2..._2010_%285%29.JPG https://upload.wikimedia.org/wikipedia/commons/thumb/2/27/2011_Egyptian_protests...26_jan25_card.jpg https://upload.wikimedia.org/wikipedia/commons/thumb/9/99/SF_Pride_2014_-_Stierc...4_-_Stierch_7.jpg https://upload.wikimedia.org/wikipedia/commons/thumb/2/2a/Industry5.svg/40px-Industry5.svg.png https://upload.wikimedia.org/wikipedia/commons/thumb/f/f9/Crystal_Clear_app_linn...ghborhood.svg.png https://en.wikipedia.org/w/skins/Vector/resources/skins.vector.styles/images/arr...n-progressive.svg https://en.wikipedia.org/w/skins/Vector/resources/skins.vector.styles/images/lin...r-progressive.svg https://en.wikipedia.org/w/resources/src/mediawiki.skinning/images/magnify-clip-ltr.svg?8330e https://upload.wikimedia.org/wikipedia/commons/thumb/9/99/Wiktionary-logo-en-v2....ogo-en-v2.svg.png https://upload.wikimedia.org/wikipedia/commons/thumb/3/32/Scholia_logo.svg/40px-Scholia_logo.svg.png https://upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/20px-Commons-logo.svg.png https://upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progr...ogressive.svg.png https://meta.wikimedia.org/w/index.php...a.org/w/index.php https://en.wikipedia.org/w/load.php...ia.org/w/load.php https://en.wikipedia.org/w/load.php...ia.org/w/load.php https://en.wikipedia.org/w/load.php...ia.org/w/load.php https://en.wikipedia.org/w/load.php...ia.org/w/load.php
Long cache headers is good (cacheHeadersLong)	The page has 4 requests that have a shorter cache time than 30 days (but still a cache time).	96
Description: Setting a cache header is good. Setting a long cache header (at least 30 days) is even better beacause then it will stay long in the browser cache. But what do you do if that asset change? Rename it and the browser will pick up the new version.
Offenders: https://en.wikipedia.org/w/load.php...ia.org/w/load.php https://en.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=vector-2022 https://en.wikipedia.org/w/load.php...ia.org/w/load.php https://en.wikipedia.org/w/load.php?lang=en&modules=site.styles&only=styles&skin=vector-2022
Make each CSS response small (optimalCssSize)	https://en.wikipedia.org/w/load.php?lang=en&modules=ext.chart.styles%7Cext.cite.styles%7Cext.echo.styles.alert%2Cbadge%7Cext.personalDashboard.menuIcon%7Cext.uls.interlanguage%7Cext.visualEditor.desktopArticleTarget.noscript%7Cext.wikimediaBadges%7Cext.wikimediamessages.styles%7Cjquery.makeCollapsible.styles%7Cmediawiki.codex.messagebox.styles%7Cmediawiki.page.gallery.styles%7Coojs-ui.styles.icons-alerts%7Cskins.vector.icons%2Cstyles%7Cskins.vector.search.codex.styles%7Cwikibase.client.init&only=styles&skin=vector-2022 size is 29.5 kB (29519) 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: URL Transfer size Content size https://en.wikipedia.org/w/load.php...ia.org/w/load.php 28.8 KB 0 b
Don't use private headers on static content (privateAssets)	The page has 2 requests with private headers. The main page has a private header. It could be right in some cases where the user can be logged in and served specific content. But if your asset is static it should never be private. Make sure that the assets really should be private and only used by one user. Otherwise, make it cacheable for everyone.	90
Description: If you set private headers on content, that means that the content are specific for that user. Static content should be able to be cached and used by everyone. Avoid setting the cache header to private.
Offenders: https://en.wikipedia.org/wiki/Facebook https://meta.wikimedia.org/w/index.php...a.org/w/index.php

Best practice advice (73)

Show/hide details

Title	Advice	Score
Cumulative Layout Shift (cumulativeLayoutShift)	Layout Shift is not supported in this browser	0
Description: Cumulative Layout Shift measures the sum total of all individual layout shift scores for unexpected layout shift that occur. The metric is measuring visual stability by quantify how often users experience unexpected layout shifts. It is one of Google Web Vitals.
Meta description (metaDescription)	The page is missing a meta description.	0
Description: Use a page description to make the page more relevant to search engines.
Do not send too long headers (longHeaders)	https://en.wikipedia.org/wiki/Facebook has a header content-security-policy that is 1419 characters long. https://en.wikipedia.org/wiki/Facebook has a header content-security-policy-report-only that is 1397 characters long. https://meta.wikimed...a.org/w/index.php has a header content-security-policy that is 1419 characters long. https://meta.wikimed...a.org/w/index.php has a header content-security-policy-report-only that is 1397 characters long.	96
Description: Do not send response headers that are too long.
Offenders: https://en.wikipedia.org/wiki/Facebook https://en.wikipedia.org/wiki/Facebook https://meta.wikimedia.org/w/index.php...a.org/w/index.php https://meta.wikimedia.org/w/index.php...a.org/w/index.php
Avoid unnecessary headers (unnecessaryHeaders)	There are 10 responses that sets both a max-age and expires header. There are 36 responses that sets a server header.	54
Description: Do not send headers that you don't need. We look for p3p, cache-control and max-age, pragma, server and x-frame-options headers. Have a look at Andrew Betts - Headers for Hackers talk as a guide https://www.youtube.com/watch?v=k92ZbrY815c or read https://www.fastly.com/blog/headers-we-dont-want.
Offenders: https://en.wikipedia.org/wiki/Facebook https://en.wikipedia.org/wiki/Facebook https://en.wikipedia.org/w/load.php...ia.org/w/load.php https://en.wikipedia.org/w/load.php...ia.org/w/load.php https://en.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=vector-2022 https://en.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=vector-2022 https://en.wikipedia.org/w/load.php...ia.org/w/load.php https://en.wikipedia.org/w/load.php...ia.org/w/load.php https://en.wikipedia.org/w/load.php?lang=en&modules=site.styles&only=styles&skin=vector-2022 https://en.wikipedia.org/w/load.php?lang=en&modules=site.styles&only=styles&skin=vector-2022 https://en.wikipedia.org/w/load.php...ia.org/w/load.php https://en.wikipedia.org/w/load.php...ia.org/w/load.php https://en.wikipedia.org/w/load.php...ia.org/w/load.php https://en.wikipedia.org/w/load.php...ia.org/w/load.php https://en.wikipedia.org/w/load.php?lang=en&modules=user&skin=vector-2022&user=Wptuser&version=d33y1 https://en.wikipedia.org/w/load.php?lang=en&modules=user&skin=vector-2022&user=Wptuser&version=d33y1 https://upload.wikimedia.org/wikipedia/en/thumb/1/1b/Semi-protection-shackle.svg...n-shackle.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/9/93/Facebook_logo_%282023%...282023%29.svg.png https://upload.wikimedia.org/wikipedia/en/6/64/Facebook_user_page.png https://upload.wikimedia.org/wikipedia/commons/thumb/b/b0/Increase2.svg/20px-Increase2.svg.png https://upload.wikimedia.org/wikipedia/commons/thumb/0/05/Meta_Platforms_Inc._lo...ropped%29.svg.png https://upload.wikimedia.org/wikipedia/commons/3/38/Facebook_Like_React.png https://upload.wikimedia.org/wikipedia/commons/thumb/f/fc/MarkZuckerberg-crop.jp...ckerberg-crop.jpg https://upload.wikimedia.org/wikipedia/en/thumb/1/12/Original-facebook.jpg/250px...inal-facebook.jpg https://upload.wikimedia.org/wikipedia/commons/thumb/0/06/Facebook.svg/250px-Facebook.svg.png https://upload.wikimedia.org/wikipedia/commons/thumb/6/69/Screen_of_Facebook_%28...ebook_%282%29.PNG https://upload.wikimedia.org/wikipedia/commons/thumb/f/f4/Facebook_t-shirt_with_...d_for_Hackers.jpg https://upload.wikimedia.org/wikipedia/commons/thumb/5/5d/Population_pyramid_of_..._users_by_age.png https://upload.wikimedia.org/wikipedia/commons/thumb/9/9c/Facebook_censorship.sv...ensorship.svg.png https://upload.wikimedia.org/wikipedia/commons/thumb/f/f3/PRISM_Collection_Detai...ction_Details.jpg https://upload.wikimedia.org/wikipedia/commons/thumb/6/62/Onavo_logo.png/250px-Onavo_logo.png https://upload.wikimedia.org/wikipedia/commons/thumb/2/26/Hands_Off%21_protest%2...5%2C_2025-053.jpg https://upload.wikimedia.org/wikipedia/commons/thumb/c/c9/Berlin_%289163009052%2...9163009052%29.jpg https://upload.wikimedia.org/wikipedia/commons/thumb/6/61/Ad-tech_London_2010_%2..._2010_%285%29.JPG https://upload.wikimedia.org/wikipedia/commons/thumb/2/27/2011_Egyptian_protests...26_jan25_card.jpg https://upload.wikimedia.org/wikipedia/commons/thumb/9/99/SF_Pride_2014_-_Stierc...4_-_Stierch_7.jpg https://upload.wikimedia.org/wikipedia/commons/thumb/2/2a/Industry5.svg/40px-Industry5.svg.png https://upload.wikimedia.org/wikipedia/commons/thumb/f/f9/Crystal_Clear_app_linn...ghborhood.svg.png https://upload.wikimedia.org/wikipedia/commons/thumb/9/99/Wiktionary-logo-en-v2....ogo-en-v2.svg.png https://upload.wikimedia.org/wikipedia/commons/thumb/3/32/Scholia_logo.svg/40px-Scholia_logo.svg.png https://meta.wikimedia.org/w/index.php...a.org/w/index.php https://en.wikipedia.org/static/apple-touch/wikipedia.png https://en.wikipedia.org/static/apple-touch/wikipedia.png https://en.wikipedia.org/static/favicon/wikipedia.ico https://en.wikipedia.org/static/favicon/wikipedia.ico

Privacy advice (94)

Show/hide details

Title	Advice	Score
Set a referrer-policy header to make sure you do not leak user information. (referrerPolicyHeader)	Set a referrer-policy header to make sure you do not leak user information.	0
Description: Referrer Policy is a new header that allows a site to control how much information the browser includes with navigations away from a document and should be set by all sites. https://scotthelme.co.uk/a-new-security-header-referrer-policy/.
Offenders: https://en.wikipedia.org/wiki/Facebook

Page info

Page info
Title	Facebook - Wikipedia
Generator	MediaWiki 1.46.0-wmf.24
Width	1920
Height	31676
DOM elements	14025
Avg DOM depth	14
Max DOM depth	30
Iframes	0
Script tags	6
Local storage	1.1 MB
Session storage	0 b
Network Information API	unknown

Resource Hints
dns-prefetch
https://meta.wikimedia.org/
preconnect
https://upload.wikimedia.org/

Technologies used to build the page.

Data collected using Wappalyzer version 6.10.54. With updated code from Webappanalyzer 2024-12-27. Use --browsertime.firefox.includeResponseBodies htmlor --browsertime.chrome.includeResponseBodies htmlto help Wappalyzer find more information about technologies used.

Technology	Confidence	Category
MediaWiki	100	Wikis
PHP	100	Programming languages
Amazon Web Services	100	PaaS
Apache Traffic Server 9.2.13	100	Web servers
HSTS	100	Security
Amazon S3	100	CDN
HTTP/2	100	Miscellaneous

Data from run 1

Visual Metrics

Browser Metrics

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 type	P
Element/tag	<p></p>
Render time	788 ms
Element render delay	351 ms
TTFB	436 ms
Resource delay	0 ms
Resource load duration	0 ms
Load time	0 ms
Size (width*height)	17427
DOM path
div:eq(2) > div > div:eq(2) > main#content > div#bodyContent > div#mw-content-text > div:eq(1) > p:eq(4)> div:eq(2) > div > div:eq(2) > main#content > div#bodyContent > div#mw-content-text > div:eq(1) > p:eq(4)>

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.

Server timings

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

PageXray

How the page is built.

Largest assets on the page (by transfer size)

Requests and sizes per content type

Data per domain

Expires and last modified statistics

CPU