Summary for 3 runs https://en.wikipedia.org/wiki/Barack

Summary

Metric	Value
Page metrics
Performance Score	80
Total Page Transfer Size	720.5 KB
Requests	31
Timing metrics
TTFB [median]	414 ms
First Paint [median]	1.100 s
Fully Loaded [median]	5.948 s
Google Web Vitals
TTFB [median]	414 ms
First Contentful Paint (FCP) [median]	1.100 s
Largest Contentful Paint (LCP) [median]	1.488 s
Cumulative Layout Shift (CLS) [median]	0.55
Total Blocking Time [median]	2.852 s
Max Potential FID [median]	930 ms
CPU metrics
CPU long tasks [median]	16
CPU longest task duration	1.000 s
CPU last long task happens at	12.844 s
Visual Metrics
First Visual Change [median]	1.134 s
Speed Index [median]	8.863 s
Visual Complete 85% [median]	13.600 s
Visual Complete 99% [median]	15.734 s
Last Visual Change [median]	16.100 s

Timings Summary

Metric	min	median	mean	max
Visual Metrics
FirstVisualChange	1.100 s	1.134 s	1.123 s	1.134 s
LastVisualChange	16.034 s	16.100 s	16.089 s	16.134 s
SpeedIndex	8.632 s	8.863 s	8.800 s	8.905 s
LargestImage	13.934 s	14.034 s	14.012 s	14.067 s
Heading	13.934 s	14.034 s	14.012 s	14.067 s
LastMeaningfulPaint	13.934 s	14.034 s	14.012 s	14.067 s
VisualReadiness	14.900 s	14.966 s	14.967 s	15.034 s
VisualComplete85	13.534 s	13.600 s	13.667 s	13.867 s
VisualComplete95	13.934 s	15.400 s	14.911 s	15.400 s
VisualComplete99	15.700 s	15.734 s	15.734 s	15.767 s
Google Web Vitals
Time To First Byte (TTFB)	412 ms	414 ms	419 ms	431 ms
Largest Contentful Paint (LCP)	1.488 s	1.488 s	1.501 s	1.528 s
First Contentful Paint (FCP)	1.084 s	1.100 s	1.103 s	1.124 s
Cumulative Layout Shift (CLS)	0.5416	0.5455	0.5445	0.5464
More metrics
firstPaint	1.084 s	1.100 s	1.103 s	1.124 s
loadEventEnd	4.450 s	4.451 s	4.476 s	4.528 s
User Timing
mwStartup	1.255 s	1.264 s	1.271 s	1.292 s
mwCentralNoticeBanner	4.240 s	4.248 s	4.269 s	4.319 s
CPU
Total Blocking Time	2.814 s	2.852 s	2.845 s	2.870 s
Max Potential FID	915 ms	930 ms	948 ms	1.000 s
CPU long tasks	16	16	16	16
CPU last long task happens at	12.758 s	12.844 s	12.820 s	12.857 s

Download video Download timeline Download HAR Download Console Logs

| Waterfall | | Download HAR |

Waterfall

Run 1 SpeedIndex median

Download HAR Compare

| Video | Download |

Video

Download video

| Filmstrip |

Filmstrip

Use--filmstrip.showAll to show all filmstrips.

0 s

1 sCPU Long Task duration 131 ms

1.1 sFirst Contentful Paint 1.100 s

1.2 sFirst Visual Change 1.134 s

1.3 smwStartup 1.264 s

1.4 sCPU Long Task duration 147 ms

1.5 sLCP <P> 1.488 s

1.6 s

1.7 sCPU Long Task duration 50 ms

1.8 sCPU Long Task duration 215 ms

2.1 sCPU Long Task duration 58 msCPU Long Task duration 254 ms

2.4 sCPU Long Task duration 94 ms

2.5 sCPU Long Task duration 54 ms

2.6 sCPU Long Task duration 86 ms

2.7 sDOM Content Loaded Time 2.608 s

2.8 sCPU Long Task duration 642 ms

3.4 sCPU Long Task duration 429 ms

3.9 sCPU Long Task duration 238 ms

4.2 sCPU Long Task duration 104 ms

4.3 smwCentralNoticeBanner 4.240 sCPU Long Task duration 108 ms

4.5 sPage Load Time 4.449 sCPU Long Task duration 1.000 s

4.6 s

5.4 s

5.6 s

5.9 s

6 sFully Loaded 5.959 s

7.1 s

7.2 s

7.3 s

7.6 s

7.7 s

12.9 sCPU Long Task duration 141 ms

13 s

13.1 sLayout Shift 0.00654 13.044 sLayout Shift 0.00815 13.078 s

13.2 sLayout Shift 0.01094 13.114 sLayout Shift 0.01255 13.143 sLayout Shift 0.01567 13.181 s

13.3 sLayout Shift 0.01987 13.216 sLayout Shift 0.02656 13.245 sLayout Shift 0.03364 13.275 s

13.4 sLayout Shift 0.04531 13.310 sLayout Shift 0.05671 13.346 sLayout Shift 0.06094 13.384 s

13.5 sLayout Shift 0.05215 13.417 sLayout Shift 0.04070 13.448 sLayout Shift 0.03281 13.478 s

13.6 sLayout Shift 0.02500 13.507 sLayout Shift 0.02031 13.539 sLayout Shift 0.00869 13.568 sLayout Shift 0.01563 13.599 sVisual Complete 85% 13.600 s

13.7 sLayout Shift 0.01265 13.630 sLayout Shift 0.01094 13.660 sLayout Shift 0.00901 13.690 s

13.8 sLayout Shift 0.00781 13.721 sLayout Shift 0.00625 13.779 s

13.9 sLayout Shift 0.00500 13.808 sLayout Shift 0.00257 13.836 s

14 s

14.1 sLargest Image 14.034 sHeading 14.034 s

14.2 s

14.3 s

14.4 s

14.8 s

15 s

15.1 s

15.2 s

15.3 s

15.4 sVisual Complete 95% 15.400 s

15.5 s

15.6 s

15.7 s

15.8 sVisual Complete 99% 15.767 s

15.9 s

16 s

16.1 sLast Visual Change 16.100 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 81
Performance score 80
Privacy score 88
Best practice score 73

Performance advice (80)

Title

Advice

Score

Avoid slowing down the critical rendering path (avoidRenderBlocking)

The page has 2 blocking requests and 0 in body parser blocking (0 JavaScript and 2 CSS). There are 1 potentially render blocking requests. You need to verify if it is render blocking: https://en.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=minerva

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.

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://upload.wikimedia.org/wikipedia/donate/f/f5/Jimmy-wales-cropped.jpg

https://en.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 16 CPU long tasks with the total of 3.751 s. The total blocking time is 2.870 s and 1 long task before first contentful paint with total time of 131 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:

unknown

self

unknown

self

Avoid doing redirects (assetsRedirects)

The page has 1 redirect. 1 of the redirects are from the base domain, please fix them!

Description: A redirect is one extra step for the user to download the asset. Avoid that if you want to be fast. Redirects are even more of a showstopper on mobile.

Offenders:

https://en.wikipedia.org/wiki/Special:CentralAutoLogin/start?useformat=mobile&type=script&usesul3=1

Avoid extra requests by setting cache headers (cacheHeaders)

The page has 6 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 159.4 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

https://en.wikipedia.org/wiki/Special:CentralAutoLogin/start?useformat=mobile&type=script&usesul3=1

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

https://auth.wikimedia.org/metawiki/wiki/Special:CentralAutoLogin/checkLoggedIn...gin/checkLoggedIn

https://upload.wikimedia.org/wikipedia/donate/f/f5/Jimmy-wales-cropped.jpg

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).

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=minerva

https://en.wikipedia.org/w/load.php?lang=en&modules=site.styles&only=styles&skin=minerva

https://en.wikipedia.org/w/api.php?action=webapp-manifest

Total JavaScript size shouldn't be too big (javascriptSize)

The total JavaScript transfer size is 347 kB and the uncompressed size is 1.3 MB. This is totally crazy! There is really room for improvement here.

Description: A lot of JavaScript often means you are downloading more than you need. How complex is the page and what can the user do on the page? Do you use multiple JavaScript frameworks?

Offenders:

URL	Transfer size	Content size
https://en.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=minerva	21.0 KB	62.9 KB
https://en.wikipedia.org/w/load.php?lang=en&modules=ext.gadget.switcher&skin=minerva&version=1knie	1.5 KB	1.3 KB
https://en.wikipedia.org/w/load.php...ia.org/w/load.php	8.8 KB	24.7 KB
https://en.wikipedia.org/w/load.php...ia.org/w/load.php	193.9 KB	775.2 KB
https://meta.wikimedia.org/w/index.php...a.org/w/index.php	54.3 KB	204.8 KB
https://auth.wikimedia.org/metawiki/wiki/Special:CentralAutoLogin/checkLoggedIn...gin/checkLoggedIn	1.4 KB	254 B
https://en.wikipedia.org/w/load.php?lang=en&modules=vue&skin=minerva&version=1hv35	57.8 KB	156.2 KB

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%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 21.7 kB (21730) 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	21.2 KB	154.4 KB

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

The page has 4 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/Barack_Obama

https://en.wikipedia.org/wiki/Special:CentralAutoLogin/start?useformat=mobile&type=script&usesul3=1

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

https://auth.wikimedia.org/metawiki/wiki/Special:CentralAutoLogin/checkLoggedIn...gin/checkLoggedIn

Best practice advice (73)

Title	Advice	Score
Cumulative Layout Shift (cumulativeLayoutShift)	You have a poor cumulative layout shift score (0.5464). 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...ia.org/w/load.php has a header sourcemap that is 1347 characters long.	99
Description: Do not send response headers that are too long.
Offenders: https://en.wikipedia.org/w/load.php...ia.org/w/load.php
Avoid unnecessary headers (unnecessaryHeaders)	There are 23 responses that sets both a max-age and expires header. There are 31 responses that sets a server header.	46
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://en.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=minerva https://en.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=minerva https://en.wikipedia.org/w/load.php?lang=en&modules=site.styles&only=styles&skin=minerva https://en.wikipedia.org/w/load.php?lang=en&modules=site.styles&only=styles&skin=minerva https://upload.wikimedia.org/wikipedia/commons/thumb/8/8d/President_Barack_Obama..._Barack_Obama.jpg https://en.wikipedia.org/static/images/mobile/copyright/wikipedia-wordmark-en.svg https://en.wikipedia.org/static/images/mobile/copyright/wikipedia-wordmark-en.svg 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/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/w/load.php?lang=en&modules=ext.gadget.switcher&skin=minerva&version=1knie https://en.wikipedia.org/w/load.php?lang=en&modules=ext.gadget.switcher&skin=minerva&version=1knie 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/wiki/Special:CentralAutoLogin/start?useformat=mobile&type=script&usesul3=1 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 https://auth.wikimedia.org/metawiki/wiki/Special:CentralAutoLogin/checkLoggedIn...gin/checkLoggedIn https://en.wikipedia.org/w/load.php?lang=en&modules=vue&skin=minerva&version=1hv35 https://en.wikipedia.org/w/load.php?lang=en&modules=vue&skin=minerva&version=1hv35 https://en.wikipedia.org/beacon/impression...beacon/impression https://upload.wikimedia.org/wikipedia/donate/f/f5/Jimmy-wales-cropped.jpg https://en.wikipedia.org/w/api.php?action=webapp-manifest https://en.wikipedia.org/w/api.php?action=webapp-manifest https://en.wikipedia.org/static/favicon/wikipedia.ico https://en.wikipedia.org/static/favicon/wikipedia.ico https://en.wikipedia.org/static/apple-touch/wikipedia.png https://en.wikipedia.org/static/apple-touch/wikipedia.png

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.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.wikipedia.org/wiki/Barack_Obama

Page info

Page info
Title	Barack Obama - Wikipedia
Generator	MediaWiki 1.46.0-wmf.5
Width	360
Height	6945
DOM elements	14233
Avg DOM depth	14
Max DOM depth	23
Iframes	0
Script tags	8
Local storage	704.4 KB
Session storage	63 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
Apache Traffic Server 9.2.11	100	Web servers
HSTS	100	Security

Data from run 1

Visual Metrics

Visual Metrics
First Visual Change	1.134 s
Speed Index	8.863 s
Largest Image	14.034 s
Heading	14.034 s
Last Meaningful Paint	14.034 s
Visual Complete 85%	13.600 s
Visual Complete 95%	15.400 s
Visual Complete 99%	15.767 s
Last Visual Change	16.100 s
Visual Readiness	14.966 s

Browser Metrics

Navigation Timing
backEndTime	414 ms
domContentLoadedTime	2.608 s
domInteractiveTime	2.606 s
domainLookupTime	89 ms
frontEndTime	3.639 s
pageDownloadTime	396 ms
pageLoadTime	4.449 s
redirectionTime	0 ms
serverConnectionTime	201 ms
serverResponseTime	516 ms

Google Web Vitals
Time to first byte (TTFB)	414 ms
First Contentful Paint (FCP)	1.100 s
Largest Contentful Paint (LCP)	1.488 s
Cumulative Layout Shift (CLS)	0.55
Total Blocking Time (TBT)	2.870 s

First Contentful Paint info
Elements that needed recalculate style before FCP	102
Time spent in recalculate style before FCP	47.433 ms

Extra timings
TTFB	414 ms
First Paint	1.100 s
Load Event End	4.451 s
Fully loaded	5.959 s

User Timing marks
mwStartup	1.264 s
mwCentralNoticeBanner	4.240 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	1.488 s
Element render delay	1.074 s
TTFB	414 ms
Resource delay	0 ms
Resource load duration	0 ms
Elements that needed recalculate style before LCP	394
Time spent in recalculate style before LCP	118.955 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

0.54642 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
0.06094	<div id="wmde-banner-app" data-v-app=""></div>,<div id="mw-mf-page-center"></div>
body > div#wmde-banner-app,body > div#mw-mf-viewport > div#mw-mf-page-center
0.05671	<div id="wmde-banner-app" data-v-app=""></div>,<div id="mw-mf-page-center"></div>
body > div#wmde-banner-app,body > div#mw-mf-viewport > div#mw-mf-page-center
0.05215	<div id="wmde-banner-app" data-v-app=""></div>,<div id="mw-mf-page-center"></div>
body > div#wmde-banner-app,body > div#mw-mf-viewport > div#mw-mf-page-center
0.04531	<div id="wmde-banner-app" data-v-app=""></div>,<div id="mw-mf-page-center"></div>
body > div#wmde-banner-app,body > div#mw-mf-viewport > div#mw-mf-page-center
0.04070	<div id="wmde-banner-app" data-v-app=""></div>,<div id="mw-mf-page-center"></div>
body > div#wmde-banner-app,body > div#mw-mf-viewport > div#mw-mf-page-center
0.03364	<div id="wmde-banner-app" data-v-app=""></div>,<div id="mw-mf-page-center"></div>,<table class="infobox vcard"></table>
body > div#wmde-banner-app,body > div#mw-mf-viewport > div#mw-mf-page-center,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
0.03281	<div id="wmde-banner-app" data-v-app=""></div>,<div id="mw-mf-page-center"></div>
body > div#wmde-banner-app,body > div#mw-mf-viewport > div#mw-mf-page-center
0.02656	<div id="wmde-banner-app" data-v-app=""></div>,<div id="mw-mf-page-center"></div>
body > div#wmde-banner-app,body > div#mw-mf-viewport > div#mw-mf-page-center
0.02500	<div id="wmde-banner-app" data-v-app=""></div>,<div id="mw-mf-page-center"></div>
body > div#wmde-banner-app,body > div#mw-mf-viewport > div#mw-mf-page-center
0.02031	<div id="wmde-banner-app" data-v-app=""></div>,<div id="mw-mf-page-center"></div>
body > div#wmde-banner-app,body > div#mw-mf-viewport > div#mw-mf-page-center
0.01987	<div id="wmde-banner-app" data-v-app=""></div>,<div id="mw-mf-page-center"></div>
body > div#wmde-banner-app,body > div#mw-mf-viewport > div#mw-mf-page-center
0.01567	<div id="wmde-banner-app" data-v-app=""></div>,<div id="mw-mf-page-center"></div>
body > div#wmde-banner-app,body > div#mw-mf-viewport > div#mw-mf-page-center
0.01563	<div id="wmde-banner-app" data-v-app=""></div>,<div id="mw-mf-page-center"></div>
body > div#wmde-banner-app,body > div#mw-mf-viewport > div#mw-mf-page-center
0.01265	<div id="wmde-banner-app" data-v-app=""></div>,<div id="mw-mf-page-center"></div>
body > div#wmde-banner-app,body > div#mw-mf-viewport > div#mw-mf-page-center
0.01255	<div id="wmde-banner-app" data-v-app=""></div>,<div id="mw-mf-page-center"></div>
body > div#wmde-banner-app,body > div#mw-mf-viewport > div#mw-mf-page-center
0.01094	<div id="wmde-banner-app" data-v-app=""></div>,<div id="mw-mf-page-center"></div>
body > div#wmde-banner-app,body > div#mw-mf-viewport > div#mw-mf-page-center
0.01094	<div id="wmde-banner-app" data-v-app=""></div>,<div id="mw-mf-page-center"></div>
body > div#wmde-banner-app,body > div#mw-mf-viewport > div#mw-mf-page-center
0.00901	<div id="wmde-banner-app" data-v-app=""></div>,<div id="mw-mf-page-center"></div>
body > div#wmde-banner-app,body > div#mw-mf-viewport > div#mw-mf-page-center
0.00869	<div id="wmde-banner-app" data-v-app=""></div>,<div id="mw-mf-page-center"></div>
body > div#wmde-banner-app,body > div#mw-mf-viewport > div#mw-mf-page-center
0.00815	<div id="wmde-banner-app" data-v-app=""></div>,<div id="mw-mf-page-center"></div>
body > div#wmde-banner-app,body > div#mw-mf-viewport > div#mw-mf-page-center
0.00781	<div id="wmde-banner-app" data-v-app=""></div>,<div id="mw-mf-page-center"></div>
body > div#wmde-banner-app,body > div#mw-mf-viewport > div#mw-mf-page-center
0.00654	<div id="wmde-banner-app" data-v-app=""></div>,<div id="mw-mf-page-center"></div>
body > div#wmde-banner-app,body > div#mw-mf-viewport > div#mw-mf-page-center
0.00625	<div id="wmde-banner-app" data-v-app=""></div>,<div id="mw-mf-page-center"></div>
body > div#wmde-banner-app,body > div#mw-mf-viewport > div#mw-mf-page-center
0.00500	<div id="wmde-banner-app" data-v-app=""></div>,<div id="mw-mf-page-center"></div>
body > div#wmde-banner-app,body > div#mw-mf-viewport > div#mw-mf-page-center
0.00257	<div id="wmde-banner-app" data-v-app=""></div>
body > div#wmde-banner-app

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
1.008 s	721.6 ms	415.3 ms	405.9 ms	9.4 ms
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.cite.ux-enhancements%7Cext.cx.entrypoints.languagesearcher.init%7Cext.cx.entrypoints.mffrequentlanguages%7Cext.cx.eventlogging.campaigns%7Cext.cx.model%7Cext.echo.centralauth%7Cext.eventLogging%2CnavigationTiming%2Cpopups%2CwikimediaEvents%2CxLab%7Cext.eventLogging.metricsPlatform%7Cext.growthExperiments.SuggestedEditSession%7Cext.phonos.init%7Cext.relatedArticles.readMore.bootstrap%7Cext.scribunto.logs%7Cext.tmh.OgvJsSupport%2Cplayer%7Cext.urlShortener.toolbar%7Cext.wikimediaEvents.xLab%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.media%2Cready%7Cmediawiki.page.watch.ajax%7Cmediawiki.template.mustache%7Cmobile.codex.styles%7Cmobile.init%2Cstartup%7Cmobile.pagesummary.styles%7Cmw.cx.SiteMapper%7Cmw.externalguidance.init%7Cskins.minerva.scripts%7Cwikibase.databox.fromWikidata&skin=minerva&version=1lnvb
Invoker: TimerHandler:setTimeout Invoker Type: user-callback Window attribution: self Source char position: 293714
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.cite.ux-enhancements%7Cext.cx.entrypoints.languagesearcher.init%7Cext.cx.entrypoints.mffrequentlanguages%7Cext.cx.eventlogging.campaigns%7Cext.cx.model%7Cext.echo.centralauth%7Cext.eventLogging%2CnavigationTiming%2Cpopups%2CwikimediaEvents%2CxLab%7Cext.eventLogging.metricsPlatform%7Cext.growthExperiments.SuggestedEditSession%7Cext.phonos.init%7Cext.relatedArticles.readMore.bootstrap%7Cext.scribunto.logs%7Cext.tmh.OgvJsSupport%2Cplayer%7Cext.urlShortener.toolbar%7Cext.wikimediaEvents.xLab%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.media%2Cready%7Cmediawiki.page.watch.ajax%7Cmediawiki.template.mustache%7Cmobile.codex.styles%7Cmobile.init%2Cstartup%7Cmobile.pagesummary.styles%7Cmw.cx.SiteMapper%7Cmw.externalguidance.init%7Cskins.minerva.scripts%7Cwikibase.databox.fromWikidata&skin=minerva&version=1lnvb
Invoker: TimerHandler:setTimeout Invoker Type: user-callback Window attribution: self Source char position: 293714
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.cite.ux-enhancements%7Cext.cx.entrypoints.languagesearcher.init%7Cext.cx.entrypoints.mffrequentlanguages%7Cext.cx.eventlogging.campaigns%7Cext.cx.model%7Cext.echo.centralauth%7Cext.eventLogging%2CnavigationTiming%2Cpopups%2CwikimediaEvents%2CxLab%7Cext.eventLogging.metricsPlatform%7Cext.growthExperiments.SuggestedEditSession%7Cext.phonos.init%7Cext.relatedArticles.readMore.bootstrap%7Cext.scribunto.logs%7Cext.tmh.OgvJsSupport%2Cplayer%7Cext.urlShortener.toolbar%7Cext.wikimediaEvents.xLab%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.media%2Cready%7Cmediawiki.page.watch.ajax%7Cmediawiki.template.mustache%7Cmobile.codex.styles%7Cmobile.init%2Cstartup%7Cmobile.pagesummary.styles%7Cmw.cx.SiteMapper%7Cmw.externalguidance.init%7Cskins.minerva.scripts%7Cwikibase.databox.fromWikidata&skin=minerva&version=1lnvb
Invoker: TimerHandler:setTimeout Invoker Type: user-callback Window attribution: self Source char position: 293714
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.cite.ux-enhancements%7Cext.cx.entrypoints.languagesearcher.init%7Cext.cx.entrypoints.mffrequentlanguages%7Cext.cx.eventlogging.campaigns%7Cext.cx.model%7Cext.echo.centralauth%7Cext.eventLogging%2CnavigationTiming%2Cpopups%2CwikimediaEvents%2CxLab%7Cext.eventLogging.metricsPlatform%7Cext.growthExperiments.SuggestedEditSession%7Cext.phonos.init%7Cext.relatedArticles.readMore.bootstrap%7Cext.scribunto.logs%7Cext.tmh.OgvJsSupport%2Cplayer%7Cext.urlShortener.toolbar%7Cext.wikimediaEvents.xLab%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.media%2Cready%7Cmediawiki.page.watch.ajax%7Cmediawiki.template.mustache%7Cmobile.codex.styles%7Cmobile.init%2Cstartup%7Cmobile.pagesummary.styles%7Cmw.cx.SiteMapper%7Cmw.externalguidance.init%7Cskins.minerva.scripts%7Cwikibase.databox.fromWikidata&skin=minerva&version=1lnvb
Forced Style And Layout Duration: 25 ms Invoker: TimerHandler:setTimeout Invoker Type: user-callback Window attribution: self Source char position: 293714
https://en.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=minerva
Forced Style And Layout Duration: 41 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
971.6 ms	1.006 s	21.5 ms	13.6 ms	7.9 ms
https://en.wikipedia.org/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=minerva
Forced Style And Layout Duration: 419 ms Invoker: IdleRequestCallback Invoker Type: user-callback Source Function Name: doPropagation Window attribution: self Source char position: 4314
Invoker: FrameRequestCallback Invoker Type: user-callback Window attribution: self Source char position: 12064

Blocking duration	Work duration	Render duration	PreLayout Duration	Style And Layout Duration
259.3 ms	255.9 ms	54.5 ms	54.5 ms	0 ms
No availible script information.

Blocking duration	Work duration	Render duration	PreLayout Duration	Style And Layout Duration
215.9 ms	226.5 ms	50.4 ms	41 ms	9.4 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
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
190.6 ms	297.7 ms	2.1 ms	2 ms	0.1 ms
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.cite.ux-enhancements%7Cext.cx.entrypoints.languagesearcher.init%7Cext.cx.entrypoints.mffrequentlanguages%7Cext.cx.eventlogging.campaigns%7Cext.cx.model%7Cext.echo.centralauth%7Cext.eventLogging%2CnavigationTiming%2Cpopups%2CwikimediaEvents%2CxLab%7Cext.eventLogging.metricsPlatform%7Cext.growthExperiments.SuggestedEditSession%7Cext.phonos.init%7Cext.relatedArticles.readMore.bootstrap%7Cext.scribunto.logs%7Cext.tmh.OgvJsSupport%2Cplayer%7Cext.urlShortener.toolbar%7Cext.wikimediaEvents.xLab%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.media%2Cready%7Cmediawiki.page.watch.ajax%7Cmediawiki.template.mustache%7Cmobile.codex.styles%7Cmobile.init%2Cstartup%7Cmobile.pagesummary.styles%7Cmw.cx.SiteMapper%7Cmw.externalguidance.init%7Cskins.minerva.scripts%7Cwikibase.databox.fromWikidata&skin=minerva&version=1lnvb
Forced Style And Layout Duration: 2 ms Invoker: TimerHandler:setTimeout Invoker Type: user-callback Window attribution: self Source char position: 293714
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.cite.ux-enhancements%7Cext.cx.entrypoints.languagesearcher.init%7Cext.cx.entrypoints.mffrequentlanguages%7Cext.cx.eventlogging.campaigns%7Cext.cx.model%7Cext.echo.centralauth%7Cext.eventLogging%2CnavigationTiming%2Cpopups%2CwikimediaEvents%2CxLab%7Cext.eventLogging.metricsPlatform%7Cext.growthExperiments.SuggestedEditSession%7Cext.phonos.init%7Cext.relatedArticles.readMore.bootstrap%7Cext.scribunto.logs%7Cext.tmh.OgvJsSupport%2Cplayer%7Cext.urlShortener.toolbar%7Cext.wikimediaEvents.xLab%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.media%2Cready%7Cmediawiki.page.watch.ajax%7Cmediawiki.template.mustache%7Cmobile.codex.styles%7Cmobile.init%2Cstartup%7Cmobile.pagesummary.styles%7Cmw.cx.SiteMapper%7Cmw.externalguidance.init%7Cskins.minerva.scripts%7Cwikibase.databox.fromWikidata&skin=minerva&version=1lnvb
Invoker: TimerHandler:setTimeout Invoker Type: user-callback Window attribution: self Source char position: 293714
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.cite.ux-enhancements%7Cext.cx.entrypoints.languagesearcher.init%7Cext.cx.entrypoints.mffrequentlanguages%7Cext.cx.eventlogging.campaigns%7Cext.cx.model%7Cext.echo.centralauth%7Cext.eventLogging%2CnavigationTiming%2Cpopups%2CwikimediaEvents%2CxLab%7Cext.eventLogging.metricsPlatform%7Cext.growthExperiments.SuggestedEditSession%7Cext.phonos.init%7Cext.relatedArticles.readMore.bootstrap%7Cext.scribunto.logs%7Cext.tmh.OgvJsSupport%2Cplayer%7Cext.urlShortener.toolbar%7Cext.wikimediaEvents.xLab%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.media%2Cready%7Cmediawiki.page.watch.ajax%7Cmediawiki.template.mustache%7Cmobile.codex.styles%7Cmobile.init%2Cstartup%7Cmobile.pagesummary.styles%7Cmw.cx.SiteMapper%7Cmw.externalguidance.init%7Cskins.minerva.scripts%7Cwikibase.databox.fromWikidata&skin=minerva&version=1lnvb
Forced Style And Layout Duration: 40 ms Invoker: TimerHandler:setTimeout Invoker Type: user-callback Window attribution: self Source char position: 293714

Blocking duration	Work duration	Render duration	PreLayout Duration	Style And Layout Duration
119.8 ms	591.1 ms	2.2 ms	0.7 ms	1.5 ms
https://en.wikipedia.org/wiki/Barack_Obama
Invoker: https://en.wikipedia.org/wiki/Barack_Obama Invoker Type: classic-script Window attribution: self

Blocking duration	Work duration	Render duration	PreLayout Duration	Style And Layout Duration
95.3 ms	25.9 ms	133.5 ms	0.1 ms	133.4 ms
No availible script information.

Blocking duration	Work duration	Render duration	PreLayout Duration	Style And Layout Duration
94.5 ms	141.9 ms	2.7 ms	2.7 ms	0 ms
Forced Style And Layout Duration: 121 ms Invoker: TimerHandler:setTimeout Invoker Type: user-callback Window attribution: self Source char position: 70077

Blocking duration

Work duration

Render duration

PreLayout Duration

Style And Layout Duration

94.5 ms

141.9 ms

2.7 ms

0 ms

Forced Style And Layout Duration: 121 ms

Invoker: TimerHandler:setTimeout
Invoker Type: user-callback
Window attribution: self
Source char position: 70077

Blocking duration	Work duration	Render duration	PreLayout Duration	Style And Layout Duration
78.1 ms	79.5 ms	73.6 ms	58.6 ms	15 ms
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.cite.ux-enhancements%7Cext.cx.entrypoints.languagesearcher.init%7Cext.cx.entrypoints.mffrequentlanguages%7Cext.cx.eventlogging.campaigns%7Cext.cx.model%7Cext.echo.centralauth%7Cext.eventLogging%2CnavigationTiming%2Cpopups%2CwikimediaEvents%2CxLab%7Cext.eventLogging.metricsPlatform%7Cext.growthExperiments.SuggestedEditSession%7Cext.phonos.init%7Cext.relatedArticles.readMore.bootstrap%7Cext.scribunto.logs%7Cext.tmh.OgvJsSupport%2Cplayer%7Cext.urlShortener.toolbar%7Cext.wikimediaEvents.xLab%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.media%2Cready%7Cmediawiki.page.watch.ajax%7Cmediawiki.template.mustache%7Cmobile.codex.styles%7Cmobile.init%2Cstartup%7Cmobile.pagesummary.styles%7Cmw.cx.SiteMapper%7Cmw.externalguidance.init%7Cskins.minerva.scripts%7Cwikibase.databox.fromWikidata&skin=minerva&version=1lnvb
Invoker: TimerHandler:setTimeout Invoker Type: user-callback Window attribution: self Source char position: 293714
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
58.5 ms	108.5 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

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.

Visual Elements

Name	Display Time	X	Y	Width	Height
LargestImage (Jimmy-wales-cropped.jpg)	14.034 s	136	-7	88	88
<img class="wmde-banner-founder-image" src="https://upload.wikimedia.org/wikipedia/donate/f/f5/Jimmy-wales-cropped.jpg" alt="Portrait von Jimmy Wales – Wikipedia-Gründer (Foto: Zachary McCune / Wikimedia Foundation, CC BY-SA 4.0)">
Heading	14.034 s	16	433	328	37
<h1 id="firstHeading" class="firstHeading mw-first-heading"></h1>

PageXray

How the page is built.

Summary
HTTP version	HTTP/2.0
Total requests	31
Total domains	4
Total transfer size	720.5 KB
Total content size	2.8 MB
Responses missing compression	8
Number of cookies	10
Third party cookies	0

Requests per response code
200	29
204	1
302	1

Largest assets on the page (by transfer size)

URL	Type	Transfer Size	Content Size
https://en.wikipedia...wiki/Barack_Obama	html	235.6 KB	1.3 MB
https://en.wikipedia...ia.org/w/load.php	javascript	193.9 KB	775.2 KB
https://en.wikipedia...ia.org/w/load.php	javascript	57.8 KB	156.2 KB
https://meta.wikimed...a.org/w/index.php	javascript	54.3 KB	204.8 KB
https://upload.wikim..._Barack_Obama.jpg	image	51.0 KB	49.9 KB
https://upload.wikim...wales-cropped.jpg	image	44.5 KB	43.4 KB
https://en.wikipedia...ia.org/w/load.php	css	21.2 KB	154.4 KB
https://en.wikipedia...ia.org/w/load.php	javascript	21.0 KB	62.9 KB
https://en.wikipedia...ia.org/w/load.php	javascript	8.8 KB	24.7 KB
https://upload.wikim...signature.svg.png	image	4.4 KB	3.3 KB
https://en.wikipedia...a-wordmark-en.svg	svg	3.5 KB	6.0 KB
https://en.wikipedia...uch/wikipedia.png	image	2.0 KB	1.3 KB
https://en.wikipedia...con/wikipedia.ico	favicon	1.8 KB	2.7 KB
https://en.wikipedia...dia.org/w/api.php	json	1.8 KB	263 B
https://en.wikipedia...ia.org/w/load.php	css	1.6 KB	2.0 KB
https://en.wikipedia...ia.org/w/load.php	javascript	1.5 KB	1.3 KB
https://auth.wikimed...gin/checkLoggedIn	javascript	1.4 KB	254 B
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	585 B
https://en.wikipedia...ia.org/w/load.php	svg	1.2 KB	414 B

Requests and sizes per content type

Content	Transfer Size	Content Size	Requests
html	235.6 KB	1.3 MB	1
css	22.9 KB	156.4 KB	2
javascript	338.8 KB	1.2 MB	7
image	102.0 KB	97.8 KB	4
svg	17.1 KB	10.4 KB	13
plain	611 B	0 b	1
json	1.8 KB	263 B	1
favicon	1.8 KB	2.7 KB	1
Total	720.5 KB	2.8 MB	30

Data per domain

Domain	Total download time	Transfer Size	Content Size	Requests
en.wikipedia.org	5.213 s	564.8 KB	2.5 MB	26
upload.wikimedia.org	1.424 s	99.9 KB	96.6 KB	3
meta.wikimedia.org	149 ms	54.3 KB	204.8 KB	1
auth.wikimedia.org	207 ms	1.4 KB	254 B	1

Expires and last modified statistics

type	min	median	max
Expires	0 seconds	4 weeks	1 year
Last modified	10 minutes	5 weeks	5 years

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	46.5 KB	2
font	0 b	0
json	1.8 KB	1
favicon	1.8 KB	1
Total	50.1 KB	4

Requests loaded after onContentLoad

Includes requests done after DOM content loaded.

Content	Transfer Size	Requests
html	0 b	0
css	0 b	0
javascript	57.8 KB	1
image	46.5 KB	2
font	0 b	0
plain	611 B	1
json	1.8 KB	1
favicon	1.8 KB	1
Total	108.5 KB	6

Render blocking requests

Render blocking information directly from Chrome.

Blocking	In body parser blocking	Potentially blocking
2	0	1

Render information

URL	Type
https://en.wikipedia...ia.org/w/load.php	non_blocking
https://en.wikipedia...ia.org/w/load.php	non_blocking
https://meta.wikimed...a.org/w/index.php	non_blocking
https://en.wikipedia...ia.org/w/load.php	blocking
https://en.wikipedia...ia.org/w/load.php	potentially_blocking
https://en.wikipedia...ia.org/w/load.php	non_blocking
https://en.wikipedia...ia.org/w/load.php	blocking
https://en.wikipedia...ia.org/w/load.php	non_blocking
https://auth.wikimed...gin/checkLoggedIn	non_blocking
https://en.wikipedia...alAutoLogin/start	non_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		2870
Max Potential First Input Delay		1000
Long Tasks before First Paint	1	131
Long Tasks before First Contentful Paint	1	131
Long Tasks before Largest Contentful Paint	2	278
Long Tasks after Load Event End	2	1141
Total Long Tasks	16	3751

CPU last long task happened at 12.844 s

Individual Long Tasks

name	startTime	duration	containerType
unknown	960	131	window
unknown	1332	147	window
unknown	1610	50	window
self	1785	215	window
self	2001	58	window
self	2063	254	window
unknown	2319	94	window
self	2445	54	window
self	2515	86	window
self	2733	642	window
self	3379	429	window
self	3865	238	window
self	4148	104	window
self	4291	108	window
self	4467	1000	window
self	12844	141	window

CPU time spent

Calculated using Tracium.

Categories (ms)
parseHTML	493
styleLayout	1463
paintCompositeRender	801
scriptParseCompile	41
scriptEvaluation	2546
garbageCollection	24
other	2156

Events (ms)
FunctionCall	2195
RunTask	1075
UpdateLayoutTree	874
Layout	561
Paint	490
ParseHTML	479
PrePaint	361
Layerize	226
PaintImage	205
V8.HandleInterrupts	114
DecodedDataDocumentParser::AppendBytes	106
DocumentLoader::BodyLoadingFinished	97
Commit	94
v8.run	85
CpuProfiler::StartProfiling	81
RunMicrotasks	79
IntersectionObserverController::computeIntersections	74
v8.compile	41
UpdateLayer	38
HitTest	36
DocumentLoader::CommitNavigation	28
V8.BytecodeBudgetInterrupt	28
EventDispatch	15
DocumentLoader::BodyDataReceivedImpl	14
ParseAuthorStyleSheet	14
HTMLDocumentParser::MaybeFetchQueuedPreloads	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	2092
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.cite.ux-enhancements%7Cext.cx.entrypoints.languagesearcher.init%7Cext.cx.entrypoints.mffrequentlanguages%7Cext.cx.eventlogging.campaigns%7Cext.cx.model%7Cext.echo.centralauth%7Cext.eventLogging%2CnavigationTiming%2Cpopups%2CwikimediaEvents%2CxLab%7Cext.eventLogging.metricsPlatform%7Cext.growthExperiments.SuggestedEditSession%7Cext.phonos.init%7Cext.relatedArticles.readMore.bootstrap%7Cext.scribunto.logs%7Cext.tmh.OgvJsSupport%2Cplayer%7Cext.urlShortener.toolbar%7Cext.wikimediaEvents.xLab%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.media%2Cready%7Cmediawiki.page.watch.ajax%7Cmediawiki.template.mustache%7Cmobile.codex.styles%7Cmobile.init%2Cstartup%7Cmobile.pagesummary.styles%7Cmw.cx.SiteMapper%7Cmw.externalguidance.init%7Cskins.minerva.scripts%7Cwikibase.databox.fromWikidata&skin=minerva&version=1lnvb	1199
https://meta.wikimedia.org/w/index.php?title=Special:BannerLoader&campaign=WMDE_FR_2025_Mobile_EN_02&banner=WMDE_FR_2025_Mobile_EN_02_var&uselang=en&debug=false	109
https://en.wikipedia.org/wiki/Barack_Obama	13

Page summary

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

Summary

Timings Summary

Waterfall

Video

Filmstrip

Coach

Coach score

Performance advice (80)

Best practice advice (73)

Privacy advice (88)

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

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

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