Page summary

Summary

Metric	Value
Page metrics
Performance Score	100
Total Page Transfer Size	7.6 KB
Requests	2
Timing metrics
TTFB [median]	845 ms
First Paint [median]	965 ms
Fully Loaded [median]	1.461 s
Google Web Vitals
TTFB [median]	845 ms
First Contentful Paint (FCP) [median]	965 ms
Largest Contentful Paint (LCP) [median]	965 ms
Visual Metrics
First Visual Change [median]	967 ms
Speed Index [median]	975 ms
Visual Complete 85% [median]	967 ms
Visual Complete 99% [median]	1.000 s
Last Visual Change [median]	1.433 s

Timings Summary

Waterfall

Run 4 SpeedIndex median

Video

Filmstrip

Use--filmstrip.showAll to show all filmstrips.

0 s

1 sDOM Content Loaded Time 953 msFirst Contentful Paint 965 msLCP <P> 965 msFirst Visual Change 967 msVisual Complete 85% 967 msVisual Complete 95% 967 ms

1.1 s

1.3 s

1.4 sLast Visual Change 1.367 sVisual Complete 99% 1.367 sLargest Image 1.367 sHeading 1.367 sPage Load Time 1.372 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 8.1.1.

Coach score

• Total score 88
• Performance score 100
• Privacy score 82
• Best practice score 60

Performance advice (100)

You have a perfect Performance score!

Best practice advice (60)

Show/hide details

Title	Advice	Score
Cumulative Layout Shift (cumulativeLayoutShift)	Layout Shift is not supported in this browser	0
Description: Cumulative Layout Shift measures the sum total of all individual layout shift scores for unexpected layout shift that occur. The metric is measuring visual stability by quantify how often users experience unexpected layout shifts. It is one of Google Web Vitals.
Meta description (metaDescription)	The page is missing a meta description.	0
Description: Use a page description to make the page more relevant to search engines.
Avoid too many third party requests (thirdParty)	The page do 50% requests to third party domains (1 requests and 4.7 kB). First party is 1 requests and 3.1 kB. The page transfer more bytes from third party domains (4.7 kB) then first party (3.1 kB). The regex .*wmflabs.* was used to calculate first/third party requests.	0
Description: Do not load most of your content from third party URLs.
Avoid unnecessary headers (unnecessaryHeaders)	There are 1 response that sets both a max-age and expires header. There are 2 responses that sets a server header.	97
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.beta.wmflabs.org/wiki/Barack_Obama https://www.wikimedia.org/static/images/wmf-logo.png https://www.wikimedia.org/static/images/wmf-logo.png

Privacy advice (82)

Show/hide details

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.beta.wmflabs.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.beta.wmflabs.org/wiki/Barack_Obama
Avoid third party cookies that is used to track the user. (thirdPartyCookies)	The page sets 2 third party cookies.	0
Description: Third party cookies are used to track the user. They are automatically blocked in Safari and Firefox.
Offenders: . .wikimedia.org NetworkProbeLimit=0.001

Page info

Page info
Title	Wikimedia Error
Width	1920
Height	995
DOM elements	25
Avg DOM depth	4
Max DOM depth	6
Iframes	0
Script tags	0
Local storage	0 b
Session storage	0 b
Network Information API	unknown

Technologies used to build the page.

Data collected using Wappalyzer version 6.10.66. 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
HSTS	100	Security
HTTP/2	100	Miscellaneous

Data from run 4

Visual Metrics

Browser Metrics

Largest Contentful Paint

When in time the page main content is rendered (collected using the Largest Contentful Paint API). Read more about Largest Contentful Paint.

Element type	P
Element/tag	<p class="text-muted"></p>
Render time	965 ms
Element render delay	121 ms
TTFB	845 ms
Resource delay	0 ms
Resource load duration	0 ms
Load time	0 ms
Size (width*height)	16492
DOM path
div:eq(1) > p:eq(1)> div:eq(1) > 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.

Server timings

Custom metrics collected through JavaScript

There are no custom configured scripts.

Extra metrics collected using scripting

There are no custom extra metrics from scripting.

Visual Elements

PageXray

How the page is built.

Largest assets on the page (by transfer size)

Requests and sizes per content type

Data per domain

Expires and last modified statistics

CPU