Run 3 for https://en.wikipedia.org/wiki/Barack

Summary

Metric	Value
Page metrics
Performance score	91
Total page size	374.6 KB
Requests	10
Timing metrics
TTFB	116 ms
First Paint	520 ms
Fully Loaded	7.359 s
Google Web Vitals
TTFB	116 ms
First Contentful Paint (FCP)	520 ms
Largest Contentful Paint (LCP)	916 ms
Cumulative Layout Shift (CLS)	0.00
Total Blocking Time	1.390 s
Max Potential FID	412 ms
CPU metrics
CPU long tasks	13
CPU last long task happens at	3.291 s
Visual Metrics
First Visual Change	533 ms
Speed Index	802 ms
Visual Complete 85%	900 ms
Visual Complete 99%	1.133 s
Last Visual Change	3.266 s

Download video Download timeline Download Console Logs

| Waterfall | | Download HAR |

Waterfall

Download HAR Compare

| Video | Download |

Video

Download video

| Filmstrip |

Filmstrip

Use--filmstrip.showAll to show all filmstrips.

0 s

0.3 sCPU Long Task duration 69 msmwStartup 251 ms

0.4 sCPU Long Task duration 117 ms

0.6 sFirst Contentful Paint 520 msFirst Visual Change 533 msHeading 533 ms

0.7 s

0.8 sCPU Long Task duration 125 ms

0.9 sVisual Complete 85% 900 msVisual Complete 95% 900 ms

1 sLCP <P> 916 msCPU Long Task duration 63 ms

1.1 sCPU Long Task duration 74 ms

1.2 sVisual Complete 99% 1.133 s

1.3 sCPU Long Task duration 345 ms

1.4 s

1.5 s

1.6 sDOM Content Loaded Time 1.520 s

1.7 sPage Load Time 1.646 s

1.8 s

1.9 sCPU Long Task duration 193 ms

2 s

2.1 sCPU Long Task duration 95 ms

2.2 sCPU Long Task duration 412 ms

2.3 s

2.4 s

2.5 s

2.6 s

2.7 sCPU Long Task duration 68 ms

2.8 sCPU Long Task duration 287 ms

3.1 sCPU Long Task duration 205 ms

3.3 sLast Visual Change 3.266 sCPU Long Task duration 73 ms

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 92
Performance score 91
Privacy score 94
Best practice score 90

Performance advice (91)

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

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 2.126 s. The total blocking time is 1.390 s and 2 long tasks before first contentful paint with total time of 186 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 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 56.8 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/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 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.cite.styles%7Cext.phonos.icons%2Cstyles%7Cext.relatedArticles.styles%7Cext.tmh.player.styles%7Cext.wikimediaBadges%7Cext.wikimediamessages.styles%7Cext.wp25EasterEggs.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 22.6 kB (22564) 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	22.0 KB	161.5 KB

Best practice advice (90)

Title	Advice	Score
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...wiki/Barack_Obama has a header content-security-policy that is 1388 characters long. https://en.wikipedia...wiki/Barack_Obama has a header content-security-policy-report-only that is 1397 characters long.	98
Description: Do not send response headers that are too long.
Offenders: https://en.wikipedia.org/wiki/Barack_Obama https://en.wikipedia.org/wiki/Barack_Obama
Avoid unnecessary headers (unnecessaryHeaders)	There are 6 responses that sets both a max-age and expires header. There are 10 responses that sets a server header.	84
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/Barack_Obama 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/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.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://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/ins-502b/v2/events?hasty=true

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/Barack_Obama

Page info

Page info
Title	Barack Obama - Wikipedia
Generator	MediaWiki 1.46.0-wmf.21
Width	360
Height	6511
DOM elements	14020
Avg DOM depth	14
Max DOM depth	23
Iframes	0
Script tags	7
Local storage	774.2 KB
Session storage	0 b
Network Information API	4g

Resource Hints
dns-prefetch
https://meta.wikimedia.org/
https://en.wikipedia.org/wiki/auth.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
HSTS	100	Security

Visual Metrics

Visual Metrics
First Visual Change	533 ms
Speed Index	802 ms
Heading	533 ms
LargestContentfulPaint	900 ms
Last Meaningful Paint	900 ms
Largest Contentful Paint	900 ms
Visual Complete 85%	900 ms
Visual Complete 95%	900 ms
Visual Complete 99%	1.133 s
Last Visual Change	3.266 s
Visual Readiness	2.733 s

Browser Metrics

Navigation Timing
backEndTime	116 ms
domContentLoadedTime	1.520 s
domInteractiveTime	1.519 s
domainLookupTime	0 ms
frontEndTime	1.313 s
pageDownloadTime	217 ms
pageLoadTime	1.646 s
redirectionTime	0 ms
serverConnectionTime	0 ms
serverResponseTime	327 ms

Google Web Vitals
Time to first byte (TTFB)	116 ms
First Contentful Paint (FCP)	520 ms
Largest Contentful Paint (LCP)	916 ms
Total Blocking Time (TBT)	1.390 s

First Contentful Paint info
Elements that needed recalculate style before FCP	101
Time spent in recalculate style before FCP	59.239 ms

Extra timings
TTFB	116 ms
First Paint	520 ms
Load Event End	1.646 s
Fully loaded	7.359 s

User Timing marks
mwStartup	251 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 type	P
Element/tag	<p></p>
Render time	916 ms
Element render delay	801 ms
TTFB	116 ms
Resource delay	0 ms
Resource load duration	0 ms
Elements that needed recalculate style before LCP	358
Time spent in recalculate style before LCP	119.755 ms
Load time	0 ms
*Size (widthheight)**	76191
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

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 duration	Render duration	PreLayout Duration	Style And Layout Duration
364 ms	432.9 ms	1.7 ms	0 ms	1.7 ms
https://en.wikipedia.org/w/load.php?lang=en&modules=ext.cite.ux-enhancements%7Cext.phonos.init%7Cext.quicksurveys.init%2Clib%7Cext.relatedArticles.readMore.bootstrap%7Cext.scribunto.logs%7Cext.tmh.OgvJsSupport%2Cplayer%7Cjquery%7Cjquery.spinner%7Cjquery.spinner.styles%7Cmediawiki.page.media&skin=minerva&version=edfqa
Forced Style And Layout Duration: 27 ms Invoker: TimerHandler:setTimeout Invoker Type: user-callback Window attribution: self Source char position: 78328

Blocking duration

Work duration

Render duration

PreLayout Duration

Style And Layout Duration

364 ms

432.9 ms

1.7 ms

0 ms

1.7 ms

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

Forced Style And Layout Duration: 27 ms

Invoker: TimerHandler:setTimeout
Invoker Type: user-callback
Window attribution: self
Source char position: 78328

Blocking duration	Work duration	Render duration	PreLayout Duration	Style And Layout Duration
296.4 ms	351.5 ms	0.6 ms	0.1 ms	0.5 ms
No availible script information.

Blocking duration	Work duration	Render duration	PreLayout Duration	Style And Layout Duration
237.4 ms	18.3 ms	277 ms	269.5 ms	7.5 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
Forced Style And Layout Duration: 34 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
234.5 ms	193.5 ms	91 ms	78.8 ms	12.2 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
156.4 ms	221.6 ms	1.4 ms	0 ms	1.4 ms
https://en.wikipedia.org/w/load.php?lang=en&modules=ext.cite.ux-enhancements%7Cext.phonos.init%7Cext.quicksurveys.init%2Clib%7Cext.relatedArticles.readMore.bootstrap%7Cext.scribunto.logs%7Cext.tmh.OgvJsSupport%2Cplayer%7Cjquery%7Cjquery.spinner%7Cjquery.spinner.styles%7Cmediawiki.page.media&skin=minerva&version=edfqa
Invoker: TimerHandler:setTimeout Invoker Type: user-callback Window attribution: self Source char position: 78328
https://en.wikipedia.org/w/load.php?lang=en&modules=ext.cite.ux-enhancements%7Cext.phonos.init%7Cext.quicksurveys.init%2Clib%7Cext.relatedArticles.readMore.bootstrap%7Cext.scribunto.logs%7Cext.tmh.OgvJsSupport%2Cplayer%7Cjquery%7Cjquery.spinner%7Cjquery.spinner.styles%7Cmediawiki.page.media&skin=minerva&version=edfqa
Forced Style And Layout Duration: 31 ms Invoker: TimerHandler:setTimeout Invoker Type: user-callback Window attribution: self Source char position: 78328

Blocking duration	Work duration	Render duration	PreLayout Duration	Style And Layout Duration
123.9 ms	177.7 ms	104.3 ms	0.1 ms	104.2 ms
https://en.wikipedia.org/wiki/Barack_Obama
Invoker: https://en.wikipedia.org/wiki/Barack_Obama 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
74 ms	23.4 ms	111.6 ms	1.5 ms	110.1 ms
https://en.wikipedia.org/w/load.php?lang=en&modules=ext.cite.ux-enhancements%7Cext.phonos.init%7Cext.quicksurveys.init%2Clib%7Cext.relatedArticles.readMore.bootstrap%7Cext.scribunto.logs%7Cext.tmh.OgvJsSupport%2Cplayer%7Cjquery%7Cjquery.spinner%7Cjquery.spinner.styles%7Cmediawiki.page.media&skin=minerva&version=edfqa
Invoker: https://en.wikipedia.org/w/load.php?lang=en&modules=ext.cite.ux-enhancements%7Cext.phonos.init%7Cext.quicksurveys.init%2Clib%7Cext.relatedArticles.readMore.bootstrap%7Cext.scribunto.logs%7Cext.tmh.OgvJsSupport%2Cplayer%7Cjquery%7Cjquery.spinner%7Cjquery.spinner.styles%7Cmediawiki.page.media&skin=minerva&version=edfqa Invoker Type: classic-script Window attribution: self

Blocking duration	Work duration	Render duration	PreLayout Duration	Style And Layout Duration
71.1 ms	98 ms	57.4 ms	0 ms	57.4 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
51.7 ms	101.7 ms	0 ms	0 ms	0 ms
No availible script information.

Blocking duration	Work duration	Render duration	PreLayout Duration	Style And Layout Duration
31.7 ms	43.9 ms	58.8 ms	44.7 ms	14.1 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=ext.cite.ux-enhancements%7Cext.phonos.init%7Cext.quicksurveys.init%2Clib%7Cext.relatedArticles.readMore.bootstrap%7Cext.scribunto.logs%7Cext.tmh.OgvJsSupport%2Cplayer%7Cjquery%7Cjquery.spinner%7Cjquery.spinner.styles%7Cmediawiki.page.media&skin=minerva&version=edfqa
Invoker: TimerHandler:setTimeout Invoker Type: user-callback Window attribution: self Source char position: 78328
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	hit-front
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	25
Frames	23
JSEventListeners	1929
LayoutObjects	956
MediaKeySessions	0
MediaKeys	0
Nodes	32498
Resources	58
ContextLifecycleStateObservers	48
V8PerContextDatas	2
WorkerGlobalScopes	0
UACSSResources	3
RTCPeerConnections	0
ResourceFetchers	25
AdSubframes	0
DetachedScriptStates	0
ArrayBufferContents	3
LayoutCount	20
RecalcStyleCount	29
LayoutDuration	160
RecalcStyleDuration	312
DevToolsCommandDuration	602
ScriptDuration	1579
V8CompileDuration	11
TaskDuration	3948
TaskOtherDuration	1283
ThreadTime	18
ProcessTime	66
JSHeapUsedSize	9815460
JSHeapTotalSize	14700544
FirstMeaningfulPaint	915

Visual Elements

Name	Display Time	X	Y	Width	Height
LargestImage (250px-President_Barack_Obama.jpg)		55	599	250	312
<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/250px-President_Barack_Obama.jpg" decoding="async" width="250" height="312" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/8d/President_Barack_Obama.jpg/500px-President_Barack_Obama.jpg 1.5x" data-file-width="2687" data-file-height="3356">
Heading	533 ms	16	75	328	37
<h1 id="firstHeading" class="firstHeading mw-first-heading"></h1>
LargestContentfulPaint	900 ms	16	286	328	246
<p></p>

PageXray

How the page is built.

Summary
HTTP version	HTTP/2.0
Total requests	10
Total domains	2
Total transfer size	374.6 KB
Total content size	1.7 MB
Responses missing compression	3
Number of cookies	3
Third party cookies	0

Requests per response code
200	9
202	1

Largest assets on the page (by transfer size)

URL	Type	Transfer Size	Content Size
https://en.wikipedia...wiki/Barack_Obama	html	241.4 KB	1.3 MB
https://upload.wikim..._Barack_Obama.jpg	image	51.0 KB	49.9 KB
https://en.wikipedia...ia.org/w/load.php	javascript	50.1 KB	173.6 KB
https://en.wikipedia...ia.org/w/load.php	css	22.0 KB	161.5 KB
https://upload.wikim...signature.svg.png	image	4.4 KB	3.3 KB
https://en.wikipedia...ia.org/w/load.php	svg	1.3 KB	707 B
https://en.wikipedia...ia.org/w/load.php	svg	1.2 KB	414 B
https://en.wikipedia...ia.org/w/load.php	svg	1.1 KB	318 B
https://en.wikipedia...ia.org/w/load.php	svg	1.1 KB	326 B
https://en.wikipedia...ns-502b/v2/events	plain	881 B	0 b

Requests and sizes per content type

Content	Transfer Size	Content Size	Requests
html	241.4 KB	1.3 MB	1
css	22.0 KB	161.5 KB	1
javascript	50.1 KB	173.6 KB	1
image	55.4 KB	53.2 KB	2
svg	4.7 KB	1.7 KB	4
plain	881 B	0 b	1
Total	374.6 KB	1.7 MB	10

Data per domain

Domain	Total download time	Transfer Size	Content Size	Requests
en.wikipedia.org	1.239 s	319.1 KB	1.6 MB	8
upload.wikimedia.org	401 ms	55.4 KB	53.2 KB	2

Expires and last modified statistics

type	min	median	max
Expires	0 seconds	2 weeks	4 weeks
Last modified	52 seconds	6 weeks	44 weeks

Console log

The page logs the following messages to the console.

Level	Message
INFO	https://en.wikipedia.org/w/load.php?lang=en&modules=ext.centralNotice.bannerHistoryLogger%2CchoiceData%2Cdisplay%2CgeoIP%2CimpressionDiet%2CkvStore%2ClargeBannerLimit%2ClegacySupport%2CstartUp%7Cext.centralauth.ForeignApi%2Ccentralautologin%7Cext.checkUser.clientHints%7Cext.cx.entrypoints.languagesearcher.init%7Cext.cx.entrypoints.mffrequentlanguages%7Cext.cx.eventlogging.campaigns%7Cext.cx.model%7Cext.echo.centralauth%7Cext.eventLogging%2CnavigationTiming%2Cpopups%2CtestKitchen%2CwikimediaEvents%2Cwp25EasterEggs%7Cext.eventLogging.metricsPlatform%7Cext.growthExperiments.SuggestedEditSession%7Cext.parsermigration.survey%7Cext.urlShortener.toolbar%7Cext.wikimediaEvents.testKitchen%7Cjquery%2Coojs%2Csite%7Cjquery.client%2CtextSelection%7Cmediawiki.DateFormatter%2CForeignApi%2CString%2CTitle%2Capi%2Cbase%2Ccldr%2Ccookie%2Cexperiments%2CjqueryMsg%2Clanguage%2Crouter%2Cstorage%2Ctemplate%2Cuser%2Cutil%2CvisibleTimeout%7Cmediawiki.ForeignApi.core%7Cmediawiki.libs.pluralruleparser%7Cmediawiki.page.ready%7Cmediawiki.page.watch.ajax%7Cmediawiki.template.mustache%7Cmobile.codex.styles%7Cmobile.init%2Cstartup%7Cmw.cx.SiteMapper%7Cmw.externalguidance.init%7Cskins.minerva.scripts%7Cwikibase.databox.fromWikidata&skin=minerva&version=b2qbv 735:14087 "Hello friend! 🍦\n\nWikipedia is powered by MediaWiki. MediaWiki is open source software and we're always keen to hear from fellow developers about what you love (😍) or what we could be doing better (😱).\n\n💪 Or work for us @ https://wikimediafoundation.org/about/jobs/"
INFO	https://en.wikipedia.org/w/load.php?lang=en&modules=mobile.init&skin=minerva&version=tovvx 0:14087 "Hello friend! 🍦\n\nWikipedia is powered by MediaWiki. MediaWiki is open source software and we're always keen to hear from fellow developers about what you love (😍) or what we could be doing better (😱).\n\n💪 Or work for us @ https://wikimediafoundation.org/about/jobs/"

Level

Message

INFO

https://en.wikipedia.org/w/load.php?lang=en&modules=ext.centralNotice.bannerHistoryLogger%2CchoiceData%2Cdisplay%2CgeoIP%2CimpressionDiet%2CkvStore%2ClargeBannerLimit%2ClegacySupport%2CstartUp%7Cext.centralauth.ForeignApi%2Ccentralautologin%7Cext.checkUser.clientHints%7Cext.cx.entrypoints.languagesearcher.init%7Cext.cx.entrypoints.mffrequentlanguages%7Cext.cx.eventlogging.campaigns%7Cext.cx.model%7Cext.echo.centralauth%7Cext.eventLogging%2CnavigationTiming%2Cpopups%2CtestKitchen%2CwikimediaEvents%2Cwp25EasterEggs%7Cext.eventLogging.metricsPlatform%7Cext.growthExperiments.SuggestedEditSession%7Cext.parsermigration.survey%7Cext.urlShortener.toolbar%7Cext.wikimediaEvents.testKitchen%7Cjquery%2Coojs%2Csite%7Cjquery.client%2CtextSelection%7Cmediawiki.DateFormatter%2CForeignApi%2CString%2CTitle%2Capi%2Cbase%2Ccldr%2Ccookie%2Cexperiments%2CjqueryMsg%2Clanguage%2Crouter%2Cstorage%2Ctemplate%2Cuser%2Cutil%2CvisibleTimeout%7Cmediawiki.ForeignApi.core%7Cmediawiki.libs.pluralruleparser%7Cmediawiki.page.ready%7Cmediawiki.page.watch.ajax%7Cmediawiki.template.mustache%7Cmobile.codex.styles%7Cmobile.init%2Cstartup%7Cmw.cx.SiteMapper%7Cmw.externalguidance.init%7Cskins.minerva.scripts%7Cwikibase.databox.fromWikidata&skin=minerva&version=b2qbv 735:14087 "Hello friend! 🍦\n\nWikipedia is powered by MediaWiki. MediaWiki is open source software and we're always keen to hear from fellow developers about what you love (😍) or what we could be doing better (😱).\n\n💪 Or work for us @ https://wikimediafoundation.org/about/jobs/"

INFO

https://en.wikipedia.org/w/load.php?lang=en&modules=mobile.init&skin=minerva&version=tovvx 0:14087 "Hello friend! 🍦\n\nWikipedia is powered by MediaWiki. MediaWiki is open source software and we're always keen to hear from fellow developers about what you love (😍) or what we could be doing better (😱).\n\n💪 Or work for us @ https://wikimediafoundation.org/about/jobs/"

Requests loaded after onLoad event

Included requests done after load event end.

Content	Transfer Size	Requests
html	0 b	0
css	0 b	0
javascript	0 b	0
image	0 b	0
font	0 b	0
plain	881 B	1
Total	881 B	1

Requests loaded after onContentLoad

Includes requests done after DOM content loaded.

Content	Transfer Size	Requests
html	0 b	0
css	0 b	0
javascript	0 b	0
image	0 b	0
font	0 b	0
plain	881 B	1
Total	881 B	1

Render blocking requests

Render blocking information directly from Chrome.

Blocking	In body parser blocking	Potentially blocking
1	0	0

Render information

URL	Type
https://en.wikipedia...ia.org/w/load.php	non_blocking
https://en.wikipedia...ia.org/w/load.php	blocking

CPU Long Tasks | CPU Time Spent | CPU Time Spent Per Request |

CPU

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

Download trace log

Long Tasks

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

Type	Quantity	Total duration (ms)
Total Blocking Time		1390
Max Potential First Input Delay		412
Long Tasks before First Paint	2	186
Long Tasks before First Contentful Paint	2	186
Long Tasks before Largest Contentful Paint	3	311
Long Tasks after Load Event End	7	1333
Total Long Tasks	13	2126

CPU last long task happened at 3.291 s

Individual Long Tasks

name	startTime	duration	containerType
self	249	69	window
unknown	385	117	window
unknown	785	125	window
self	939	63	window
unknown	1006	74	window
self	1233	345	window
self	1833	193	window
self	2026	95	window
self	2177	412	window
self	2649	68	window
self	2735	287	window
self	3038	205	window
self	3291	73	window

CPU time spent

Calculated using Tracium.

Categories (ms)
parseHTML	434
styleLayout	473
paintCompositeRender	78
scriptParseCompile	11
scriptEvaluation	1594
garbageCollection	33
other	1421

Events (ms)
FunctionCall	1419
CpuProfiler::StartProfiling	587
RunTask	537
ParseHTML	411
UpdateLayoutTree	298
Layout	162
DocumentLoader::BodyLoadingFinished	98
DecodedDataDocumentParser::AppendBytes	78
V8.HandleInterrupts	60
Paint	53
v8.run	51
Layerize	20
v8.produceCache	18
PaintImage	18
ParseAuthorStyleSheet	17
PrePaint	17
DocumentLoader::CommitNavigation	13
DocumentLoader::BodyDataReceivedImpl	12
HTMLDocumentParser::MaybeFetchQueuedPreloads	12
RunMicrotasks	11
v8.compile	11

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	1672
https://en.wikipedia.org/w/load.php?lang=en&modules=ext.cite.ux-enhancements%7Cext.phonos.init%7Cext.quicksurveys.init%2Clib%7Cext.relatedArticles.readMore.bootstrap%7Cext.scribunto.logs%7Cext.tmh.OgvJsSupport%2Cplayer%7Cjquery%7Cjquery.spinner%7Cjquery.spinner.styles%7Cmediawiki.page.media&skin=minerva&version=edfqa	720
https://en.wikipedia.org/wiki/Barack_Obama	18

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

Screenshots

afterPageCompleteCheck.jpg

layoutShift.jpg

largestContentfulPaint.jpg

Run 3 summary

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

Summary

Waterfall

Video

Filmstrip

Coach

Coach score

Performance advice (91)

Best practice advice (90)

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

Render blocking requests

Render information

CPU

Long Tasks

Individual Long Tasks

CPU time spent

Time spent per request

Screenshots