Run 2 for https://en.m.wikipedia.org/wiki/Barack

Summary

Metric	Value
Page metrics
Performance score	91
Total page size	392.8 KB
Requests	10
Timing metrics
TTFB	122 ms
First Paint	850 ms
Fully Loaded	1.376 s
Google Web Vitals
TTFB	122 ms
First Contentful Paint (FCP)	850 ms
Largest Contentful Paint (LCP)	1.424 s
Cumulative Layout Shift (CLS)	0.00
208 ms
Total Blocking Time	1.362 s
Max Potential FID	458 ms
CPU metrics
CPU long tasks	12
CPU last long task happens at	3.348 s
Visual Metrics
First Visual Change	866 ms
Speed Index	1.288 s
Visual Complete 85%	1.433 s
Visual Complete 99%	1.866 s
Last Visual Change	3.200 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 54 msmwStartup 279 ms

0.5 sCPU Long Task duration 51 ms

0.8 sCPU Long Task duration 98 ms

0.9 sFirst Contentful Paint 850 msFirst Visual Change 866 msHeading 866 ms

1 s

1.1 sCPU Long Task duration 169 ms

1.2 s

1.3 sCPU Long Task duration 183 ms

1.4 sFully Loaded 1.376 s

1.5 sLCP <P> 1.424 sVisual Complete 85% 1.433 sVisual Complete 95% 1.433 sCPU Long Task duration 200 ms

1.6 s

1.7 s

1.8 sCPU Long Task duration 196 ms

1.9 sVisual Complete 99% 1.866 s

2 s

2.1 sCPU Long Task duration 267 ms

2.2 s

2.3 sCPU Long Task duration 82 ms

2.4 sDOM Content Loaded Time 2.393 s

2.5 sPage Load Time 2.414 s

2.6 sCPU Long Task duration 458 ms

2.8 s

3.1 sCPU Long Task duration 163 ms

3.2 sLast Visual Change 3.200 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 8.0.2.

Coach score

Total score 90
Performance score 91
Privacy score 88
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.m.wikipedia.org/static/images/mobile/copyright/wikipedia-wordmark-en.svg

Inline CSS for faster first render (inlineCss)

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

Description: In the early days of the Internet, inlining CSS was one of the ugliest things you can do. That has changed if you want your page to start rendering fast for your user. Always inline the critical CSS when you use HTTP/1 and HTTP/2 (avoid doing CSS requests that block rendering) and lazy load and cache the rest of the CSS. It is a little more complicated when using HTTP/2. Does your server support HTTP push? Then maybe that can help. Do you have a lot of users on a slow connection and are serving large chunks of HTML? Then it could be better to use the inline technique, becasue some servers always prioritize HTML content over CSS so the user needs to download the HTML first, before the CSS is downloaded.

Avoid CPU Long Tasks (longTasks)

The page has 12 CPU long tasks with the total of 2.015 s. The total blocking time is 1.362 s and 3 long tasks before first contentful paint with total time of 203 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 47.7 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/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.m.wikipedia.org/w/load.php...ia.org/w/load.php

Make each CSS response small (optimalCssSize)

https://en.m.wikipedia.org/w/load.php?lang=en&modules=ext.cite.styles%7Cext.phonos.icons%2Cstyles%7Cext.relatedArticles.styles%7Cext.tmh.player.styles%7Cext.wikimediaBadges%7Cext.wikimediamessages.styles%7Cmediawiki.hlist%7Cmobile.init.styles%7Cskins.minerva.amc.styles%7Cskins.minerva.codex.styles%7Cskins.minerva.content.styles.images%7Cskins.minerva.icons%2Cstyles%7Cwikibase.client.init&only=styles&skin=minerva size is 18.5 kB (18499) 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.m.wikipedia.org/w/load.php...ia.org/w/load.php	18.1 KB	129.6 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.
Avoid unnecessary headers (unnecessaryHeaders)	There are 7 responses that sets both a max-age and expires header. There are 10 responses that sets a server header.	83
Description: Do not send headers that you don't need. We look for p3p, cache-control and max-age, pragma, server and x-frame-options headers. Have a look at Andrew Betts - Headers for Hackers talk as a guide https://www.youtube.com/watch?v=k92ZbrY815c or read https://www.fastly.com/blog/headers-we-dont-want.
Offenders: https://en.m.wikipedia.org/wiki/Barack_Obama https://en.m.wikipedia.org/w/load.php...ia.org/w/load.php https://en.m.wikipedia.org/w/load.php...ia.org/w/load.php https://upload.wikimedia.org/wikipedia/commons/thumb/8/8d/President_Barack_Obama..._Barack_Obama.jpg https://upload.wikimedia.org/wikipedia/commons/thumb/1/11/Barack_Obama_signature...signature.svg.png https://en.m.wikipedia.org/w/load.php...ia.org/w/load.php https://en.m.wikipedia.org/w/load.php...ia.org/w/load.php https://en.m.wikipedia.org/w/load.php...ia.org/w/load.php https://en.m.wikipedia.org/w/load.php...ia.org/w/load.php https://en.m.wikipedia.org/w/load.php...ia.org/w/load.php https://en.m.wikipedia.org/w/load.php...ia.org/w/load.php https://en.m.wikipedia.org/w/load.php...ia.org/w/load.php https://en.m.wikipedia.org/w/load.php...ia.org/w/load.php https://en.m.wikipedia.org/w/load.php...ia.org/w/load.php https://en.m.wikipedia.org/w/load.php...ia.org/w/load.php https://en.m.wikipedia.org/w/load.php...ia.org/w/load.php https://en.m.wikipedia.org/w/load.php...ia.org/w/load.php

Privacy advice (88)

Title	Advice	Score
Use a good Content-Security-Policy header to make sure you you avoid Cross Site Scripting (XSS) attacks. (contentSecurityPolicyHeader)	Set a Content-Security-Policy header to make sure you are not open for Cross Site Scripting (XSS) attacks. You can start with setting a Content-Security-Policy-Report-Only header, that will only report the violation, not stop the download.	0
Description: Content Security Policy is delivered via a HTTP response header, and defines approved sources of content that the browser may load. It can be an effective countermeasure to Cross Site Scripting (XSS) attacks and is also widely supported and usually easily deployed. https://scotthelme.co.uk/content-security-policy-an-introduction/.
Offenders: https://en.m.wikipedia.org/wiki/Barack_Obama
Set a referrer-policy header to make sure you do not leak user information. (referrerPolicyHeader)	Set a referrer-policy header to make sure you do not leak user information.	0
Description: Referrer Policy is a new header that allows a site to control how much information the browser includes with navigations away from a document and should be set by all sites. https://scotthelme.co.uk/a-new-security-header-referrer-policy/.
Offenders: https://en.m.wikipedia.org/wiki/Barack_Obama

Page info

Page info
Title	Barack Obama - Wikipedia
Generator	MediaWiki 1.44.0-wmf.12
Width	360
Height	6505
DOM elements	13722
Avg DOM depth	14
Max DOM depth	23
Iframes	0
Script tags	7
Local storage	687.4 KB
Session storage	0 b
Network Information API	4g

Resource Hints
dns-prefetch
https://meta.wikimedia.org/
https://en.m.wikipedia.org/wiki/login.wikimedia.org
preconnect
https://upload.wikimedia.org/

Technologies used to build the page.

Data collected using Wappalyzerversion 6.10.66. Use --browsertime.firefox.includeResponseBodies htmlor --browsertime.chrome.includeResponseBodies htmlto help Wappalyser find more information about technologies used.

Technology	Confidence	Category
MediaWiki	100	Wikis
PHP	100	Programming languages
Apache Traffic Server 9.2.6	100	Web servers
HSTS	100	Security

Visual Metrics

Visual Metrics
First Visual Change	866 ms
Speed Index	1.288 s
Heading	866 ms
LargestContentfulPaint	1.766 s
Last Meaningful Paint	1.766 s
Largest Contentful Paint	1.766 s
Visual Complete 85%	1.433 s
Visual Complete 95%	1.433 s
Visual Complete 99%	1.866 s
Last Visual Change	3.200 s
Visual Readiness	2.334 s

Browser Metrics

Navigation Timing
backEndTime	122 ms
domContentLoadedTime	2.393 s
domInteractiveTime	2.393 s
domainLookupTime	0 ms
frontEndTime	1.806 s
pageDownloadTime	486 ms
pageLoadTime	2.414 s
redirectionTime	0 ms
serverConnectionTime	0 ms
serverResponseTime	603 ms

Google Web Vitals
Time to first byte (TTFB)	122 ms
First Contentful Paint (FCP)	850 ms
Largest Contentful Paint (LCP)	1.424 s
Interaction to next paint (INP)	208 ms
Total Blocking Time (TBT)	1.362 s

First Contentful Paint info
Elements that needed recalculate style before FCP	101
Time spent in recalculate style before FCP	62.028 ms

Extra timings
TTFB	122 ms
First Paint	850 ms
Load Event End	2.420 s
Fully loaded	1.376 s

User Timing marks
mwStartup	279 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	1.424 s
Elements that needed recalculate style before LCP	417
Time spent in recalculate style before LCP	135.607 ms
Load time	0 ms
*Size (widthheight)**	75958
DOM path
div#mw-mf-viewport > div#mw-mf-page-center > main#content > div#bodyContent > div#mw-content-text > div:eq(0) > section#mf-section-0 > p:eq(1)> div#mw-mf-viewport > div#mw-mf-page-center > main#content > div#bodyContent > div#mw-content-text > div:eq(0) > section#mf-section-0 > p:eq(1)>

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.

Interaction to Next Paint

Interaction to Next Paint (INP) is a metric that try to measure responsiveness. It's useful if you are testing user journeys. Read more about Interaction to Next Paint.

The measured latency was 208 ms.

Event type	mouseout
Element type	MAIN
Element class name	mw-body
Event target	#content
Load state when the event happened	loading

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
416 ms	472.6 ms	7.4 ms	2.3 ms	5.1 ms
https://en.m.wikipedia.org/w/load.php?lang=en&modules=ext.cite.ux-enhancements%7Cext.phonos.init%7Cext.relatedArticles.readMore.bootstrap%7Cext.scribunto.logs%7Cext.tmh.OgvJsSupport%2Cplayer%7Cjquery%7Cmediawiki.page.media%7Cmobile.startup&skin=minerva&version=sc86c
Invoker: TimerHandler:setTimeout Invoker Type: user-callback Window attribution: self Source char position: 63813
https://en.m.wikipedia.org/w/load.php?lang=en&modules=ext.cite.ux-enhancements%7Cext.phonos.init%7Cext.relatedArticles.readMore.bootstrap%7Cext.scribunto.logs%7Cext.tmh.OgvJsSupport%2Cplayer%7Cjquery%7Cmediawiki.page.media%7Cmobile.startup&skin=minerva&version=sc86c
Forced Style And Layout Duration: 41 ms Invoker: TimerHandler:setTimeout Invoker Type: user-callback Window attribution: self Source char position: 63813

Blocking duration	Work duration	Render duration	PreLayout Duration	Style And Layout Duration
300 ms	194.1 ms	180.9 ms	30.8 ms	150.1 ms
https://en.m.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=minerva
Invoker: IdleRequestCallback Invoker Type: user-callback Source Function Name: doPropagation Window attribution: self Source char position: 4310
https://en.m.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=minerva
Invoker: FrameRequestCallback Invoker Type: user-callback Source Function Name: flushCssBuffer Window attribution: self Source char position: 3233

Blocking duration	Work duration	Render duration	PreLayout Duration	Style And Layout Duration
298 ms	270.1 ms	80.9 ms	57.9 ms	23 ms
No availible script information.

Blocking duration	Work duration	Render duration	PreLayout Duration	Style And Layout Duration
169 ms	74.1 ms	199.9 ms	173.3 ms	26.6 ms
https://en.m.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=minerva
Invoker: IdleRequestCallback Invoker Type: user-callback Source Function Name: doPropagation Window attribution: self Source char position: 4310
https://en.m.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=minerva
Invoker: FrameRequestCallback Invoker Type: user-callback Source Function Name: flushCssBuffer Window attribution: self Source char position: 3233

Blocking duration	Work duration	Render duration	PreLayout Duration	Style And Layout Duration
156 ms	30.6 ms	195.4 ms	175.9 ms	19.5 ms
https://en.m.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=minerva
Invoker: IdleRequestCallback Invoker Type: user-callback Source Function Name: doPropagation Window attribution: self Source char position: 4310
https://en.m.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=minerva
Invoker: FrameRequestCallback Invoker Type: user-callback Source Function Name: flushCssBuffer Window attribution: self Source char position: 3233

Blocking duration	Work duration	Render duration	PreLayout Duration	Style And Layout Duration
121 ms	177.8 ms	7.2 ms	2.5 ms	4.7 ms
https://en.m.wikipedia.org/w/load.php?lang=en&modules=ext.cite.ux-enhancements%7Cext.phonos.init%7Cext.relatedArticles.readMore.bootstrap%7Cext.scribunto.logs%7Cext.tmh.OgvJsSupport%2Cplayer%7Cjquery%7Cmediawiki.page.media%7Cmobile.startup&skin=minerva&version=sc86c
Forced Style And Layout Duration: 25 ms Invoker: TimerHandler:setTimeout Invoker Type: user-callback Window attribution: self Source char position: 63813

Blocking duration

Work duration

Render duration

PreLayout Duration

Style And Layout Duration

121 ms

177.8 ms

7.2 ms

2.5 ms

4.7 ms

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

Forced Style And Layout Duration: 25 ms

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

Blocking duration	Work duration	Render duration	PreLayout Duration	Style And Layout Duration
108 ms	620.1 ms	6.9 ms	0.2 ms	6.7 ms
https://en.m.wikipedia.org/wiki/Barack_Obama
Invoker: https://en.m.wikipedia.org/wiki/Barack_Obama Invoker Type: classic-script Window attribution: self
https://en.m.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=minerva
Invoker: https://en.m.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=minerva Invoker Type: classic-script Window attribution: self
https://en.m.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=minerva
Invoker: IdleRequestCallback Invoker Type: user-callback Window attribution: self Source char position: 14423
https://en.m.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=minerva
Invoker: IdleRequestCallback Invoker Type: user-callback Window attribution: self Source char position: 14423
https://en.m.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=minerva
Invoker: IdleRequestCallback Invoker Type: user-callback Window attribution: self Source char position: 14423
https://en.m.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=minerva
Invoker: IdleRequestCallback Invoker Type: user-callback Window attribution: self Source char position: 14423

Blocking duration	Work duration	Render duration	PreLayout Duration	Style And Layout Duration
0 ms	148.9 ms	6.1 ms	0 ms	6.1 ms
No availible script information.

Blocking duration	Work duration	Render duration	PreLayout Duration	Style And Layout Duration
0 ms	64.7 ms	11.3 ms	1.7 ms	9.6 ms
https://en.m.wikipedia.org/w/load.php?lang=en&modules=ext.cite.ux-enhancements%7Cext.phonos.init%7Cext.relatedArticles.readMore.bootstrap%7Cext.scribunto.logs%7Cext.tmh.OgvJsSupport%2Cplayer%7Cjquery%7Cmediawiki.page.media%7Cmobile.startup&skin=minerva&version=sc86c
Invoker: DOMWindow.onload Invoker Type: event-listener Window attribution: self Source char position: 79980

Blocking duration	Work duration	Render duration	PreLayout Duration	Style And Layout Duration
0 ms	68.7 ms	1.3 ms	0 ms	1.3 ms
https://en.m.wikipedia.org/w/load.php?lang=en&modules=ext.cite.ux-enhancements%7Cext.phonos.init%7Cext.relatedArticles.readMore.bootstrap%7Cext.scribunto.logs%7Cext.tmh.OgvJsSupport%2Cplayer%7Cjquery%7Cmediawiki.page.media%7Cmobile.startup&skin=minerva&version=sc86c
Forced Style And Layout Duration: 1 ms Invoker: TimerHandler:setTimeout Invoker Type: user-callback Window attribution: self Source char position: 63813
https://en.m.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=minerva
Invoker: TimerHandler:setTimeout Invoker Type: user-callback Window attribution: self Source char position: 21511

Server timings

name	duration	description
cache	0	hit-front
host	0	cp3067

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	37
Frames	36
JSEventListeners	691
LayoutObjects	931
MediaKeySessions	0
MediaKeys	0
Nodes	30519
Resources	61
ContextLifecycleStateObservers	48
V8PerContextDatas	2
WorkerGlobalScopes	0
UACSSResources	3
RTCPeerConnections	0
ResourceFetchers	37
AdSubframes	0
DetachedScriptStates	0
ArrayBufferContents	0
LayoutCount	18
RecalcStyleCount	31
LayoutDuration	166
RecalcStyleDuration	302
DevToolsCommandDuration	329
ScriptDuration	1466
V8CompileDuration	8
TaskDuration	3685
TaskOtherDuration	1414
ThreadTime	14
ProcessTime	58
JSHeapUsedSize	9541464
JSHeapTotalSize	13160448
FirstMeaningfulPaint	1424

Visual Elements

Name	Display Time	X	Y	Width	Height
LargestImage (220px-President_Barack_Obama.jpg)		70	620	220	275
<img alt="Obama standing in the Oval Office with his arms folded and smiling" src="//upload.wikimedia.org/wikipedia/commons/thumb/8/8d/President_Barack_Obama.jpg/220px-President_Barack_Obama.jpg" decoding="async" width="220" height="275" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/8d/President_Barack_Obama.jpg/330px-President_Barack_Obama.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/8/8d/President_Barack_Obama.jpg/440px-President_Barack_Obama.jpg 2x" data-file-width="2687" data-file-height="3356">
Heading	866 ms	16	75	328	37
<h1 id="firstHeading" class="firstHeading mw-first-heading"></h1>
LargestContentfulPaint	1.766 s	16	308	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	392.8 KB
Total content size	1.8 MB
Responses missing compression	4
Number of cookies	1
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.m.wikiped...wiki/Barack_Obama	html	229.4 KB	1.3 MB
https://en.m.wikiped...ia.org/w/load.php	javascript	67.5 KB	254.6 KB
https://upload.wikim..._Barack_Obama.jpg	image	43.4 KB	42.5 KB
https://en.m.wikiped...ia.org/w/load.php	javascript	26.9 KB	126.6 KB
https://en.m.wikiped...ia.org/w/load.php	css	18.1 KB	129.6 KB
https://upload.wikim...signature.svg.png	image	3.2 KB	2.4 KB
https://en.m.wikiped...ia.org/w/load.php	svg	1.2 KB	707 B
https://en.m.wikiped...ia.org/w/load.php	svg	1.1 KB	414 B
https://en.m.wikiped...ia.org/w/load.php	svg	1.1 KB	318 B
https://en.m.wikiped...ia.org/w/load.php	svg	1.0 KB	326 B

Requests and sizes per content type

Content	Transfer Size	Content Size	Requests
html	229.4 KB	1.3 MB	1
css	18.1 KB	129.6 KB	1
javascript	94.4 KB	381.3 KB	2
image	46.6 KB	44.9 KB	2
svg	4.4 KB	1.7 KB	4
Total	392.8 KB	1.8 MB	10

Data per domain

Domain	Total download time	Transfer Size	Content Size	Requests
en.m.wikipedia.org	1.943 s	346.3 KB	1.8 MB	8
upload.wikimedia.org	276 ms	46.6 KB	44.9 KB	2

Expires and last modified statistics

type	min	median	max
Expires	0 seconds	4 weeks	4 weeks
Last modified	59 seconds	5 weeks	6 years

Console log

The page logs the following messages to the console.

Level	Message
WARNING	https://en.m.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=minerva 11:307 "This page is using the deprecated ResourceLoader module \"mediawiki.Uri\".\n[1.43] Please use browser native URL."
INFO	https://en.m.wikipedia.org/w/load.php?lang=en&modules=ext.centralNotice.choiceData%2Cdisplay%2CgeoIP%2CimpressionDiet%2CkvStore%2CstartUp%7Cext.centralauth.centralautologin%7Cext.checkUser.clientHints%7Cext.cx.entrypoints.languagesearcher.init%7Cext.cx.entrypoints.mffrequentlanguages%7Cext.cx.eventlogging.campaigns%7Cext.echo.centralauth%7Cext.eventLogging%2CnavigationTiming%2Cpopups%2CwikimediaEvents%7Cext.growthExperiments.SuggestedEditSession%7Cext.urlShortener.toolbar%7Cjquery%2Coojs%2Csite%7Cjquery.client%7Cmediawiki.String%2CTitle%2CUri%2Capi%2Cbase%2Ccldr%2Ccookie%2Cexperiments%2CjqueryMsg%2Clanguage%2Crouter%2Cstorage%2Ctemplate%2Cuser%2Cutil%2CvisibleTimeout%7Cmediawiki.libs.pluralruleparser%7Cmediawiki.page.ready%7Cmediawiki.page.watch.ajax%7Cmediawiki.template.mustache%7Cmobile.codex.styles%7Cmobile.init%2Cstartup%7Cmobile.pagelist.styles%7Cmobile.pagesummary.styles%7Cmw.externalguidance.init%7Cskins.minerva.scripts&skin=minerva&version=ovuwc 583:994 "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/"
WARNING	https://en.m.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=minerva 11:307 "This page is using the deprecated ResourceLoader module \"mediawiki.Uri\".\n[1.43] Please use browser native URL."
INFO	https://en.m.wikipedia.org/w/load.php?lang=en&modules=mobile.init&skin=minerva&version=1eavn 10:994 "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/"

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.m.wikiped...ia.org/w/load.php	non_blocking
https://en.m.wikiped...ia.org/w/load.php	non_blocking
https://en.m.wikiped...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		1362
Max Potential First Input Delay		458
Long Tasks before First Paint	3	203
Long Tasks before First Contentful Paint	3	203
Long Tasks before Largest Contentful Paint	5	555
Long Tasks after Load Event End	3	715
Total Long Tasks	12	2015

CPU last long task happened at 3.348 s

Individual Long Tasks

name	startTime	duration	containerType
self	277	54	window
self	450	51	window
unknown	743	98	window
self	1059	169	window
self	1229	183	window
self	1490	200	window
self	1755	196	window
self	2018	267	window
unknown	2289	82	window
self	2522	458	window
self	3008	163	window
self	3348	94	window

CPU time spent

Calculated using Tracium.

Categories (ms)
parseHTML	441
styleLayout	499
paintCompositeRender	46
scriptParseCompile	9
scriptEvaluation	1472
garbageCollection	80
other	1668

Events (ms)
FunctionCall	1318
CpuProfiler::StartProfiling	702
RunTask	653
ParseHTML	424
UpdateLayoutTree	301
Layout	175
DocumentLoader::BodyLoadingFinished	97
DecodedDataDocumentParser::AppendBytes	70
v8.run	45
Paint	31
DocumentLoader::CommitNavigation	31
PrePaint	20
v8.produceCache	18
Commit	18
ParseAuthorStyleSheet	17
DocumentLoader::BodyDataReceivedImpl	17
RunMicrotasks	16
V8.GC_MC_INCREMENTAL_EMBEDDER_TRACING	16
V8.HandleInterrupts	14
EventDispatch	10

Time spent per request

URL	CPU time (ms)
https://en.m.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=minerva	794
https://en.m.wikipedia.org/w/load.php?lang=en&modules=ext.cite.ux-enhancements%7Cext.phonos.init%7Cext.relatedArticles.readMore.bootstrap%7Cext.scribunto.logs%7Cext.tmh.OgvJsSupport%2Cplayer%7Cjquery%7Cmediawiki.page.media%7Cmobile.startup&skin=minerva&version=sc86c	743
https://en.m.wikipedia.org/wiki/Barack_Obama	11

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

Screenshots

afterPageCompleteCheck.jpg

layoutShift.jpg

largestContentfulPaint.jpg

Run 2 summary

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

Summary

Waterfall

Video

Filmstrip

Coach

Coach score

Performance advice (91)

Best practice advice (90)

Privacy advice (88)

Page info

Technologies used to build the page.

Visual Metrics

Browser Metrics

Largest Contentful Paint

Detected Cumulative Layout Shift

Interaction to Next Paint

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

Render blocking requests

Render information

CPU

Long Tasks

Individual Long Tasks

CPU time spent

Time spent per request

Screenshots