Run 1 summary

Summary

Metric	Value
Page metrics
Performance score	92
Total page size	11.6 KB
Requests	3
Timing metrics
TTFB	23.226 s
First Paint	23.272 s
Fully Loaded	23.836 s
Google Web Vitals
TTFB	23.226 s
First Contentful Paint (FCP)	23.272 s
Largest Contentful Paint (LCP)	23.656 s
Cumulative Layout Shift (CLS)	0.00
Visual Metrics
First Visual Change	23.266 s
Speed Index	23.378 s
Visual Complete 85%	23.666 s
Visual Complete 99%	23.666 s
Last Visual Change	23.666 s

Waterfall

Video

Filmstrip

Use--filmstrip.showAll to show all filmstrips.

0 s

23.3 sDOM Content Loaded Time 23.240 sFirst Visual Change 23.266 sFirst Contentful Paint 23.272 s

23.4 s

23.5 s

23.6 s

23.7 sPage Load Time 23.634 sLCP <IMG> 23.656 sLast Visual Change 23.666 sVisual Complete 85% 23.666 sVisual Complete 95% 23.666 sVisual Complete 99% 23.666 sLargest Image 23.666 sHeading 23.666 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 89
• Performance score 92
• Privacy score 87
• Best practice score 83

Performance advice (92)

Show/hide details

Title	Advice	Score
Have a fast first contentful paint (firstContentfulPaint)	First contentful paint is poor (23.272 s). It is in the Google Web Vitals poor range, slower than 3 seconds.The page has a high time to first byte (TTFB) 23.226 s that you should look into to improve first contentful paint.	0
Description: The First Contentful Paint (FCP) metric measures the time from when the page starts loading to when any part of the page content is rendered on the screen. For this metric, "content" refers to text, images (including background images), <svg> elements, or non-white <canvas> elements.
Have a fast largest contentful paint (largestContentfulPaint)	Largest contentful paint is poor 23.656 s. It is in the Google Web Vitals poor range, slower than 4.5 seconds. You can add fetchPriority="high" to the image to increase the load priority in Chrome.	0
Description: Largest contentful paint is one of Google Web Vitals and reports the render time of the largest image or text block visible within the viewport, relative to when the page first started loading. To be fast according to Google, it needs to render before 2.5 seconds and results over 4 seconds is poor performance.
Offenders: https://www.wikimedia.org/static/images/wmf.png
Avoid missing and error requests (responseOk)	The page has 1 error response. The page has 1 response with code 503.	90
Description: Your page should never request assets that return a 400 or 500 error. These requests are never cached. If that happens something is broken. Please fix it.
Offenders: https://en.wikipedia.beta.wmcloud.org/wiki/Barack_Obama

Best practice advice (83)

Show/hide details

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.beta.wmcloud.org/wiki/Barack_Obama https://en.wikipedia.beta.wmcloud.org/wiki/Barack_Obama
Avoid too many third party requests (thirdParty)	The page do 33% requests to third party domains (1 requests and 4.7 kB). First party is 2 requests and 7.2 kB. The regex .*wmcloud.* was used to calculate first/third party requests.	50
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 3 responses that sets a server header.	96
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.wmcloud.org/wiki/Barack_Obama https://www.wikimedia.org/static/images/wmf.png https://www.wikimedia.org/static/images/wmf.png https://en.wikipedia.beta.wmcloud.org/favicon.ico

Privacy advice (87)

Show/hide details

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.beta.wmcloud.org/wiki/Barack_Obama
Avoid third party cookies that is used to track the user. (thirdPartyCookies)	The page sets 1 third party cookie.	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	1919
Height	992
DOM elements	13
Avg DOM depth	3
Max DOM depth	5
Iframes	0
Script tags	0
Local storage	0 b
Session storage	0 b
Network Information API	4g

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
Amazon Web Services	100	PaaS
Apache Traffic Server 9.2.11	100	Web servers
HSTS	100	Security
Amazon S3	100	CDN

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	IMG
Element/tag	<img id="logo" src="https://www.wikimedia.org/static/images/wmf.png" srcset="https://www.wikimedia.org/static/images/wmf-2x.png 2x" alt="Wikimedia" width="135" height="135">
Render time	23.656 s
Element render delay	23 ms
TTFB	23.226 s
Resource delay	10 ms
Resource load duration	397 ms
Elements that needed recalculate style before LCP	11
Time spent in recalculate style before LCP	0.587 ms
Element id	logo
Load time	23.634 s
URL	https://www.wikimedi...ic/images/wmf.png
Size (width*height)	18225
DOM path
div > a > img#logo> div > a > img#logo>

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.

The Largest Contentful Paint API highlighted this image as a part of the LCP.

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

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.

CDP Performance

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

Console log

The page logs the following messages to the console.

Requests loaded after onLoad event

Included requests done after load event end.

Requests loaded after onContentLoad

Includes requests done after DOM content loaded.

CPU

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

Long Tasks

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

CPU time spent

Calculated using Tracium.

Screenshots

afterPageCompleteCheck.jpg

layoutShift.jpg

largestContentfulPaint.jpg