Run 1 for https://en.wikipedia.org/wiki/Facebook at 2026-04-29 18:08:21

Summary

Metric	Value
Page metrics
Performance score	84
Total page size	361.4 KB
Requests	10
Timing metrics
TTFB	1.107 s
First Paint	1.936 s
Fully Loaded	3.308 s
Google Web Vitals
TTFB	1.107 s
First Contentful Paint (FCP)	1.936 s
Largest Contentful Paint (LCP)	2.104 s
Cumulative Layout Shift (CLS)	0.33
Total Blocking Time	1.000 s
Max Potential FID	311 ms
CPU metrics
CPU long tasks	13
CPU last long task happens at	4.286 s
Visual Metrics
First Visual Change	1.933 s
Speed Index	2.719 s
Visual Complete 85%	3.966 s
Visual Complete 99%	4.100 s
Last Visual Change	12.000 s

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| Waterfall | | Download HAR |

Waterfall

Download HAR Compare

| Video | Download |

Video

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| Filmstrip |

Filmstrip

Use--filmstrip.showAll to show all filmstrips.

0 s

1.5 sCPU Long Task duration 57 msmwStartup 1.433 s

1.8 sCPU Long Task duration 159 ms

2 sFirst Visual Change 1.933 sLargest Image 1.933 sFirst Contentful Paint 1.936 s

2.1 sCPU Long Task duration 85 msCPU Long Task duration 67 ms

2.2 sLCP <P> 2.104 s

2.3 s

2.4 sCPU Long Task duration 192 ms

2.5 s

2.6 sCPU Long Task duration 77 msDOM Content Loaded Time 2.593 s

2.7 sPage Load Time 2.608 sCPU Long Task duration 106 ms

2.8 sCPU Long Task duration 63 ms

2.9 sCPU Long Task duration 274 ms

3 s

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3.4 sFully Loaded 3.308 sCPU Long Task duration 311 ms

3.5 s

3.6 s

3.7 sCPU Long Task duration 176 ms

3.8 s

3.9 s

4 smwCentralNoticeBanner 3.933 sLayout Shift 0.33143 3.963 sVisual Complete 85% 3.966 sVisual Complete 95% 3.966 sHeading 3.966 s

4.1 sCPU Long Task duration 64 msVisual Complete 99% 4.100 s

4.3 sCPU Long Task duration 135 ms

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12 sLast Visual Change 12.000 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 85
Performance score 84
Privacy score 94
Best practice score 74

Performance advice (84)

Title

Advice

Score

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.

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

Have a fast first contentful paint (firstContentfulPaint)

First contentful paint can be improved (1.936 s). It is in the Google Web Vitals needs improvement range, slower than 1.8 seconds.

Description: The First Contentful Paint (FCP) metric measures the time from when the page starts loading to when any part of the page content is rendered on the screen. For this metric, "content" refers to text, images (including background images), <svg> elements, or non-white <canvas> elements.

Inline CSS for faster first render (inlineCss)

The page has both inline CSS and CSS requests even though it uses a HTTP/2-ish connection. If you have many users on slow connections, it can be better to only inline the CSS. Run your own tests and check the waterfall graph to see what happens.

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 13 CPU long tasks with the total of 1.766 s. The total blocking time is 1.000 s and 2 long tasks before first contentful paint with total time of 216 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.

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

self

unknown

self

Avoid extra requests by setting cache headers (cacheHeaders)

The page has 5 requests that are missing a cache time. Configure a cache time so the browser doesn't need to download them every time. It will save 102.7 kB the next access.

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/b/b9/2023_Facebook_icon.svg...book_icon.svg.png

https://upload.wikimedia.org/wikipedia/en/6/64/Facebook_user_page.png

https://upload.wikimedia.org/wikipedia/commons/thumb/9/93/Facebook_logo_%282023%...282023%29.svg.png

https://upload.wikimedia.org/wikipedia/commons/thumb/b/b0/Increase2.svg/40px-Increase2.svg.png

https://meta.wikimedia.org/w/index.php...a.org/w/index.php

Long cache headers is good (cacheHeadersLong)

The page has 1 request that have a shorter cache time than 30 days (but still a cache time).

Description: Setting a cache header is good. Setting a long cache header (at least 30 days) is even better beacause then it will stay long in the browser cache. But what do you do if that asset change? Rename it and the browser will pick up the new version.

Offenders:

https://en.wikipedia.org/w/load.php...ia.org/w/load.php

Make each CSS response small (optimalCssSize)

https://en.wikipedia.org/w/load.php?lang=en&modules=ext.chart.styles%7Cext.cite.styles%7Cext.echo.styles.alert%2Cbadge%7Cext.personalDashboard.menuIcon%7Cext.relatedArticles.styles%7Cext.wikimediaBadges%7Cext.wikimediamessages.styles%7Cmediawiki.codex.messagebox.styles%7Cmediawiki.hlist%7Cmediawiki.page.gallery.styles%7Cmobile.init.styles%7Coojs-ui.styles.icons-alerts%7Cskins.minerva.amc.styles%7Cskins.minerva.codex.styles%7Cskins.minerva.content.styles.images%7Cskins.minerva.icons%2Cstyles%7Cskins.minerva.loggedin.styles%7Cskins.minerva.overflow.icons%7Cskins.minerva.personalMenu.icons%7Cwikibase.client.init&only=styles&skin=minerva size is 27.9 kB (27896) and that is bigger than the limit of 14.5 kB. Try to make the CSS files fit into 14.5 KB.

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	27.2 KB	221.9 KB

Don't use private headers on static content (privateAssets)

The page has 2 requests with private headers. The main page has a private header. It could be right in some cases where the user can be logged in and served specific content. But if your asset is static it should never be private. Make sure that the assets really should be private and only used by one user. Otherwise, make it cacheable for everyone.

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 (74)

Title	Advice	Score
Cumulative Layout Shift (cumulativeLayoutShift)	You have a poor cumulative layout shift score (0.3314). It is in the Google Web Vitals poor range, with a shift higher than 0.25. You should manually check the filmstrip or video and check if it will affect the user.	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 5 responses that sets both a max-age and expires header. There are 10 responses that sets a server header.	85
Description: Do not send headers that you don't need. We look for p3p, cache-control and max-age, pragma, server and x-frame-options headers. Have a look at Andrew Betts - Headers for Hackers talk as a guide https://www.youtube.com/watch?v=k92ZbrY815c or read https://www.fastly.com/blog/headers-we-dont-want.
Offenders: https://en.wikipedia.org/wiki/Facebook https://en.wikipedia.org/wiki/Facebook https://en.wikipedia.org/w/load.php...ia.org/w/load.php https://en.wikipedia.org/w/load.php...ia.org/w/load.php https://upload.wikimedia.org/wikipedia/commons/thumb/b/b9/2023_Facebook_icon.svg...book_icon.svg.png https://upload.wikimedia.org/wikipedia/en/6/64/Facebook_user_page.png https://upload.wikimedia.org/wikipedia/commons/thumb/9/93/Facebook_logo_%282023%...282023%29.svg.png https://upload.wikimedia.org/wikipedia/commons/thumb/b/b0/Increase2.svg/40px-Increase2.svg.png https://en.wikipedia.org/w/load.php...ia.org/w/load.php https://en.wikipedia.org/w/load.php...ia.org/w/load.php https://en.wikipedia.org/w/load.php...ia.org/w/load.php https://en.wikipedia.org/w/load.php...ia.org/w/load.php https://en.wikipedia.org/w/load.php...ia.org/w/load.php https://en.wikipedia.org/w/load.php...ia.org/w/load.php https://meta.wikimedia.org/w/index.php...a.org/w/index.php

Privacy advice (94)

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	361
Height	4492
DOM elements	11798
Avg DOM depth	13
Max DOM depth	20
Iframes	0
Script tags	8
Local storage	1.3 MB
Session storage	0 b
Network Information API	4g

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
HSTS	100	Security
Amazon S3	100	CDN

Visual Metrics

Visual Metrics
First Visual Change	1.933 s
Speed Index	2.719 s
Largest Image	1.933 s
Heading	3.966 s
LargestContentfulPaint	0 ms
Last Meaningful Paint	3.966 s
Visual Complete 85%	3.966 s
Visual Complete 95%	3.966 s
Visual Complete 99%	4.100 s
Last Visual Change	12.000 s
Visual Readiness	10.067 s

Browser Metrics

Navigation Timing
backEndTime	1.107 s
domContentLoadedTime	2.593 s
domInteractiveTime	2.593 s
domainLookupTime	0 ms
frontEndTime	960 ms
pageDownloadTime	541 ms
pageLoadTime	2.608 s
redirectionTime	0 ms
serverConnectionTime	0 ms
serverResponseTime	1.642 s

Google Web Vitals
Time to first byte (TTFB)	1.107 s
First Contentful Paint (FCP)	1.936 s
Largest Contentful Paint (LCP)	2.104 s
Cumulative Layout Shift (CLS)	0.33
Total Blocking Time (TBT)	1.000 s

First Contentful Paint info
Elements that needed recalculate style before FCP	160
Time spent in recalculate style before FCP	102.348 ms

Extra timings
TTFB	1.107 s
First Paint	1.936 s
Load Event End	2.609 s
Fully loaded	3.308 s

User Timing marks
mwStartup	1.433 s
mwCentralNoticeBanner	3.933 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 type	P
Element/tag	<p></p>
Render time	2.104 s
Element render delay	998 ms
TTFB	1.107 s
Resource delay	0 ms
Resource load duration	0 ms
Elements that needed recalculate style before LCP	329
Time spent in recalculate style before LCP	127.319 ms
Load time	0 ms
*Size (widthheight)**	83385
DOM path
div#mw-mf-viewport > div#mw-mf-page-center > main#content > div#bodyContent > div#mw-content-text > div:eq(0) > section#mf-section-0 > p:eq(1)> div#mw-mf-viewport > div#mw-mf-page-center > main#content > div#bodyContent > div#mw-content-text > div:eq(0) > section#mf-section-0 > p:eq(1)>

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

0.33143 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.

Score	HTML Element
0.33143	<div id="bodyContent" class="content"></div>,<div class="pre-content heading-holder"></div>,<ul id="p-views" class="page-actions-menu__list minerva-icon-only-menu"></ul>,<table class="infobox vcard"></table>
body > div#mw-mf-viewport > div#mw-mf-page-center > main#content > div#bodyContent,body > div#mw-mf-viewport > div#mw-mf-page-center > main#content > div:eq(1),body > div#mw-mf-viewport > div#mw-mf-page-center > main#content > div:eq(1) > nav > ul#p-views,body > div#mw-mf-viewport > div#mw-mf-page-center > main#content > div#bodyContent > div#mw-content-text > div:eq(0) > section#mf-section-0 > table

Score

HTML Element

0.33143

body > div#mw-mf-viewport > div#mw-mf-page-center > main#content > div#bodyContent,body > div#mw-mf-viewport > div#mw-mf-page-center > main#content > div:eq(1),body > div#mw-mf-viewport > div#mw-mf-page-center > main#content > div:eq(1) > nav > ul#p-views,body > div#mw-mf-viewport > div#mw-mf-page-center > main#content > div#bodyContent > div#mw-content-text > div:eq(0) > section#mf-section-0 > table

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 duration	Render duration	PreLayout Duration	Style And Layout Duration
262.1 ms	37.6 ms	298.6 ms	286.2 ms	12.4 ms
https://en.wikipedia.org/w/load.php?lang=en&modules=ext.chart.bootstrap%7Cjquery&skin=minerva&version=s42id
Invoker: TimerHandler:setTimeout Invoker Type: user-callback Window attribution: self Source char position: 46910
https://en.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=minerva
Invoker: IdleRequestCallback Invoker Type: user-callback Source Function Name: doPropagation Window attribution: self Source char position: 4314
https://en.wikipedia.org/w/load.php?lang=en&modules=ext.chart.bootstrap%7Cjquery&skin=minerva&version=s42id
Invoker: TimerHandler:setTimeout Invoker Type: user-callback Window attribution: self Source char position: 46910
https://en.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=minerva
Forced Style And Layout Duration: 57 ms Invoker: FrameRequestCallback Invoker Type: user-callback Source Function Name: flushCssBuffer Window attribution: self Source char position: 3240

Blocking duration	Work duration	Render duration	PreLayout Duration	Style And Layout Duration
233.2 ms	319.2 ms	8.6 ms	0 ms	8.6 ms
https://en.wikipedia.org/w/load.php?lang=en&modules=ext.chart.bootstrap%7Cjquery&skin=minerva&version=s42id
Invoker: TimerHandler:setTimeout Invoker Type: user-callback Window attribution: self Source char position: 46910
https://en.wikipedia.org/w/load.php?lang=en&modules=ext.chart.bootstrap%7Cjquery&skin=minerva&version=s42id
Invoker: TimerHandler:setTimeout Invoker Type: user-callback Window attribution: self Source char position: 46910
https://en.wikipedia.org/w/load.php?lang=en&modules=ext.chart.bootstrap%7Cjquery&skin=minerva&version=s42id
Invoker: TimerHandler:setTimeout Invoker Type: user-callback Window attribution: self Source char position: 46910

Blocking duration	Work duration	Render duration	PreLayout Duration	Style And Layout Duration
189 ms	607 ms	147.6 ms	0.7 ms	146.9 ms
https://en.wikipedia.org/wiki/Facebook
Invoker: https://en.wikipedia.org/wiki/Facebook Invoker Type: classic-script Window attribution: self
https://en.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=minerva
Invoker: https://en.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=minerva Invoker Type: classic-script Window attribution: self

Blocking duration	Work duration	Render duration	PreLayout Duration	Style And Layout Duration
181.1 ms	193.6 ms	39.2 ms	0 ms	39.2 ms
No availible script information.

Blocking duration	Work duration	Render duration	PreLayout Duration	Style And Layout Duration
129.5 ms	195.4 ms	2.6 ms	1.8 ms	0.8 ms
https://en.wikipedia.org/w/load.php?lang=en&modules=ext.chart.bootstrap%7Cjquery&skin=minerva&version=s42id
Forced Style And Layout Duration: 24 ms Invoker: TimerHandler:setTimeout Invoker Type: user-callback Window attribution: self Source char position: 46910

Blocking duration

Work duration

Render duration

PreLayout Duration

Style And Layout Duration

129.5 ms

195.4 ms

2.6 ms

1.8 ms

0.8 ms

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

Forced Style And Layout Duration: 24 ms

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

Blocking duration	Work duration	Render duration	PreLayout Duration	Style And Layout Duration
115.1 ms	108.2 ms	58.5 ms	43.5 ms	15 ms
https://en.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=minerva
Invoker: IdleRequestCallback Invoker Type: user-callback Source Function Name: doPropagation Window attribution: self Source char position: 4314
https://en.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=minerva
Invoker: FrameRequestCallback Invoker Type: user-callback Source Function Name: flushCssBuffer Window attribution: self Source char position: 3240

Blocking duration	Work duration	Render duration	PreLayout Duration	Style And Layout Duration
84.6 ms	134.6 ms	0 ms	0 ms	0 ms
https://en.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=minerva
Invoker: IdleRequestCallback Invoker Type: user-callback Source Function Name: flushWrites Window attribution: self Source char position: 19340

Blocking duration	Work duration	Render duration	PreLayout Duration	Style And Layout Duration
49.2 ms	84.9 ms	31.4 ms	0 ms	31.4 ms
https://en.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=minerva
Invoker: IdleRequestCallback Invoker Type: user-callback Source Function Name: doPropagation Window attribution: self Source char position: 4314

Blocking duration	Work duration	Render duration	PreLayout Duration	Style And Layout Duration
36.5 ms	15.9 ms	76.4 ms	0 ms	76.4 ms
No availible script information.

Blocking duration	Work duration	Render duration	PreLayout Duration	Style And Layout Duration
22 ms	16.6 ms	60.4 ms	41.9 ms	18.5 ms
https://en.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=minerva
Invoker: IdleRequestCallback Invoker Type: user-callback Source Function Name: doPropagation Window attribution: self Source char position: 4314
https://en.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=minerva
Invoker: FrameRequestCallback Invoker Type: user-callback Source Function Name: flushCssBuffer Window attribution: self Source char position: 3240

Server timings

name	duration	description
cache	0	pass
host	0	cp3070

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

name	value
AudioHandlers	0
AudioWorkletProcessors	0
Documents	38
Frames	38
JSEventListeners	1461
LayoutObjects	984
MediaKeySessions	0
MediaKeys	0
Nodes	56343
Resources	99
ContextLifecycleStateObservers	110
V8PerContextDatas	3
WorkerGlobalScopes	0
UACSSResources	3
RTCPeerConnections	0
ResourceFetchers	38
AdSubframes	0
DetachedScriptStates	0
ArrayBufferContents	0
LayoutCount	21
RecalcStyleCount	603
LayoutDuration	156
RecalcStyleDuration	640
DevToolsCommandDuration	489
ScriptDuration	1428
V8CompileDuration	13
TaskDuration	5713
TaskOtherDuration	2988
ThreadTime	15
ProcessTime	104
JSHeapUsedSize	17358300
JSHeapTotalSize	18149376
FirstMeaningfulPaint	1935

Visual Elements

Name	Display Time	X	Y	Width	Height
LargestImage (wikipedia-wordmark-en-25.svg)	1.933 s	53	16	140	22
<img src="/static/images/mobile/copyright/wikipedia-wordmark-en-25.svg" alt="Wikipedia" width="140" height="22" style="width: 8.75em; height: 1.375em;">
Heading	3.966 s	16	326	328	37
<h1 id="firstHeading" class="firstHeading mw-first-heading"></h1>
LargestContentfulPaint		16	537	328	264
<p></p>

PageXray

How the page is built.

Summary
HTTP version	HTTP/2.0
Total requests	10
Total domains	3
Total transfer size	361.4 KB
Total content size	1.5 MB
Responses missing compression	5
Number of cookies	2
Third party cookies	0

Requests per response code
200	10

Largest assets on the page (by transfer size)

URL	Type	Transfer Size	Content Size
https://en.wikipedia.org/wiki/Facebook	html	188.5 KB	1.0 MB
https://upload.wikim...ook_user_page.png	image	82.1 KB	81.1 KB
https://en.wikipedia...ia.org/w/load.php	javascript	40.5 KB	139.0 KB
https://en.wikipedia...ia.org/w/load.php	css	27.2 KB	221.9 KB
https://upload.wikim...282023%29.svg.png	image	7.0 KB	6.1 KB
https://meta.wikimed...a.org/w/index.php	javascript	6.0 KB	6.4 KB
https://upload.wikim...book_icon.svg.png	image	4.2 KB	3.2 KB
https://en.wikipedia...ia.org/w/load.php	javascript	3.8 KB	13.2 KB
https://upload.wikim...Increase2.svg.png	image	1.1 KB	180 B
https://en.wikipedia...ia.org/w/load.php	svg	1.1 KB	292 B

Requests and sizes per content type

Content	Transfer Size	Content Size	Requests
html	188.5 KB	1.0 MB	1
css	27.2 KB	221.9 KB	1
javascript	50.3 KB	158.6 KB	3
image	94.3 KB	90.6 KB	4
svg	1.1 KB	292 B	1
Total	361.4 KB	1.5 MB	10

Data per domain

Domain	Total download time	Transfer Size	Content Size	Requests
en.wikipedia.org	2.385 s	261.1 KB	1.4 MB	5
upload.wikimedia.org	691 ms	94.3 KB	90.6 KB	4
meta.wikimedia.org	104 ms	6.0 KB	6.4 KB	1

Expires and last modified statistics

type	min	median	max
Expires	0 seconds	0 seconds	4 weeks
Last modified	1 minute	4 weeks	2 years

Console log

The page logs the following messages to the console.

Level	Message
WARNING	https://en.wikipedia.org/w/load.php?lang=en&modules=mediawiki.base&skin=minerva&version=uwf14 7:434 "Use of \"mw.testKitchen.compat.getExperiment()\" is deprecated. mw.testKitchen.compat.getExperiment() is provided for backwards compatibility with existing experiment code. Use mw.testKitchen.getExperiment() instead."
INFO	https://en.wikipedia.org/w/load.php?lang=en&modules=mobile.init&skin=minerva&version=dijsa 0:14087 "Hello friend! 🍦\n\nWikipedia is built by developers like you 👨‍💻 (yes it's open source)\n\nStart your journey 🛤️ here @ https://developer.wikimedia.org\n\n💪 Or work with us @ https://wikimediafoundation.org/about/jobs/"
WARNING	https://en.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=minerva 11:149 "This page is using the deprecated ResourceLoader module \"moment\".\n[1.44] Use mediawiki.DateFormatter or native Intl function instead. See https://phabricator.wikimedia.org/T146798"

Requests loaded after onLoad event

Included requests done after load event end.

Content	Transfer Size	Requests
html	0 b	0
css	0 b	0
javascript	9.8 KB	2
image	0 b	0
font	0 b	0
Total	9.8 KB	2

Requests loaded after onContentLoad

Includes requests done after DOM content loaded.

Content	Transfer Size	Requests
html	0 b	0
css	0 b	0
javascript	9.8 KB	2
image	0 b	0
font	0 b	0
Total	9.8 KB	2

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.

Type	Quantity	Total duration (ms)
Total Blocking Time		1000
Max Potential First Input Delay		311
Long Tasks before First Paint	2	216
Long Tasks before First Contentful Paint	2	216
Long Tasks before Largest Contentful Paint	4	368
Long Tasks after Load Event End	7	1129
Total Long Tasks	13	1766

CPU last long task happened at 4.286 s

Individual Long Tasks

name	startTime	duration	containerType
self	1431	57	window
unknown	1769	159	window
unknown	2008	85	window
self	2100	67	window
self	2315	192	window
unknown	2509	77	window
self	2675	106	window
self	2781	63	window
self	2888	274	window
self	3331	311	window
self	3659	176	window
self	4099	64	window
self	4286	135	window

CPU time spent

Calculated using Tracium.

Categories (ms)
parseHTML	322
styleLayout	784
paintCompositeRender	75
scriptParseCompile	13
scriptEvaluation	1451
garbageCollection	181
other	2853

Events (ms)
FunctionCall	1267
RunTask	1144
UpdateLayoutTree	628
CpuProfiler::StartProfiling	491
PrePaint	372
Layerize	346
ParseHTML	305
Layout	156
Commit	129
IntersectionObserverController::computeIntersections	98
DocumentLoader::BodyLoadingFinished	80
v8.run	70
DecodedDataDocumentParser::AppendBytes	65
Paint	51
V8.GC_HEAP_EMBEDDER_TRACING_EPILOGUE	48
V8.HandleInterrupts	40
V8.GC_MC_INCREMENTAL_EMBEDDER_TRACING	34
V8.GC_MC_EVACUATE_COPY_PARALLEL	21
V8.GC_MARK_COMPACTOR	19
ParseAuthorStyleSheet	17
HTMLDocumentParser::MaybeFetchQueuedPreloads	16
PaintImage	15
v8.produceCache	15
DocumentLoader::BodyDataReceivedImpl	14
V8.GC_MC_EVACUATE_UPDATE_POINTERS_TO_NEW_ROOTS	14
v8.callFunction	13
v8.compile	13
RunMicrotasks	10

Time spent per request

URL	CPU time (ms)
https://en.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=minerva	1459
https://en.wikipedia.org/w/load.php?lang=en&modules=ext.chart.bootstrap%7Cjquery&skin=minerva&version=s42id	628
https://meta.wikimedia.org/w/index.php?title=Special:BannerLoader&campaign=Picture+of+the+Year+2025+Round+2&banner=POTY_2023_P2&uselang=en&debug=false	33
https://en.wikipedia.org/w/load.php?lang=en&modules=ext.centralNotice.display&skin=minerva&version=10yis	19
https://en.wikipedia.org/wiki/Facebook	19
https://en.wikipedia.org/w/load.php?lang=en&modules=oojs-ui-core&skin=minerva&version=1whkk	16

| afterPageCompleteCheck.jpg | layoutShift.jpg | largestContentfulPaint.jpg |

Screenshots

afterPageCompleteCheck.jpg

layoutShift.jpg

largestContentfulPaint.jpg

Run 1 summary

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

Summary

Waterfall

Video

Filmstrip

Coach

Coach score

Performance advice (84)

Best practice advice (74)

Privacy advice (94)

Page info

Technologies used to build the page.

Visual Metrics

Browser Metrics

Largest Contentful Paint

Detected Cumulative Layout Shift

Long Animation Frames

Server timings

Custom metrics collected through JavaScript

Extra metrics collected using scripting

CDP Performance

Visual Elements

PageXray

Largest assets on the page (by transfer size)

Requests and sizes per content type

Data per domain

Expires and last modified statistics

Console log

Requests loaded after onLoad event

Requests loaded after onContentLoad

CPU

Long Tasks

Individual Long Tasks

CPU time spent

Time spent per request

Screenshots