Run 3 summary

Summary

Metric	Value
Page metrics
Performance score	98
Total page size	85.2 KB
Requests	9
Timing metrics
TTFB	514 ms
First Paint	826 ms
Fully Loaded	1.311 s
Google Web Vitals
TTFB	514 ms
First Contentful Paint (FCP)	812 ms
Largest Contentful Paint (LCP)	827 ms
168 ms
Visual Metrics
First Visual Change	833 ms
Speed Index	1.262 s
Visual Complete 85%	867 ms
Visual Complete 99%	9.167 s
Last Visual Change	10.400 s

Waterfall

Video

Filmstrip

Use--filmstrip.showAll to show all filmstrips.

0 s

0.9 sFirst Contentful Paint 812 msLCP <IMG> 827 msFirst Visual Change 833 msLargest Image 833 msDOM Content Loaded Time 838 msVisual Complete 85% 867 msVisual Complete 95% 867 msHeading 867 ms

1 s

1.1 s

1.2 s

1.3 sPage Load Time 1.217 s

1.4 sFully Loaded 1.311 s

1.9 s

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6 s

6.8 s

8 s

8.1 s

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8.4 s

9.2 sVisual Complete 99% 9.167 s

10.4 sLast Visual Change 10.400 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 93
• Performance score 98
• Privacy score 88
• Best practice score 84

Performance advice (98)

Show/hide details

Title	Advice	Score
Have a fast largest contentful paint (largestContentfulPaint)	You can add fetchPriority="high" to the image to increase the load priority in Chrome.	95
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.
Avoid extra requests by setting cache headers (cacheHeaders)	The page has 1 request that are missing a cache time. Configure a cache time so the browser doesn't need to download them every time. It will save 3.3 kB the next access.	90
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/donate/1/14/Wikimedia_Foundation_logo_-_wordmark.svg
Long cache headers is good (cacheHeadersLong)	The page has 5 requests that have a shorter cache time than 30 days (but still a cache time).	95
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://www.wikipedia.org/portal/wikipedia.org/assets/img/Wikipedia-logo-v2.png https://www.wikipedia.org/portal/wikipedia.org/assets/js/index-ee724cd52c.js https://www.wikipedia.org/portal/wikipedia.org/assets/js/gt-ie9-38c8b5f74a.js https://www.wikipedia.org/portal/wikipedia.org/assets/img/sprite-e49fbf32.svg https://www.wikipedia.org/portal/wikipedia.org/assets/img/Wikinews-logo_sister.png

Best practice advice (84)

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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.
Avoid unnecessary headers (unnecessaryHeaders)	There are 7 responses that sets both a max-age and expires header. There are 9 responses that sets a server header.	84
Description: Do not send headers that you don't need. We look for p3p, cache-control and max-age, pragma, server and x-frame-options headers. Have a look at Andrew Betts - Headers for Hackers talk as a guide https://www.youtube.com/watch?v=k92ZbrY815c or read https://www.fastly.com/blog/headers-we-dont-want.
Offenders: https://www.wikipedia.org/ https://www.wikipedia.org/portal/wikipedia.org/assets/img/Wikipedia-logo-v2.png https://www.wikipedia.org/portal/wikipedia.org/assets/img/Wikipedia-logo-v2.png https://upload.wikimedia.org/wikipedia/donate/1/14/Wikimedia_Foundation_logo_-_wordmark.svg https://www.wikipedia.org/portal/wikipedia.org/assets/js/index-ee724cd52c.js https://www.wikipedia.org/portal/wikipedia.org/assets/js/index-ee724cd52c.js https://www.wikipedia.org/portal/wikipedia.org/assets/js/gt-ie9-38c8b5f74a.js https://www.wikipedia.org/portal/wikipedia.org/assets/js/gt-ie9-38c8b5f74a.js https://www.wikipedia.org/portal/wikipedia.org/assets/img/sprite-e49fbf32.svg https://www.wikipedia.org/portal/wikipedia.org/assets/img/sprite-e49fbf32.svg https://www.wikipedia.org/portal/wikipedia.org/assets/img/Wikinews-logo_sister.png https://www.wikipedia.org/portal/wikipedia.org/assets/img/Wikinews-logo_sister.png https://www.wikipedia.org/static/apple-touch/wikipedia.png https://www.wikipedia.org/static/apple-touch/wikipedia.png https://www.wikipedia.org/static/favicon/wikipedia.ico https://www.wikipedia.org/static/favicon/wikipedia.ico

Privacy advice (88)

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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://www.wikipedia.org/
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://www.wikipedia.org/

Page info

Page info
Title	Wikipedia
Width	1920
Height	1193
DOM elements	1143
Avg DOM depth	9
Max DOM depth	12
Iframes	0
Script tags	4
Local storage	94 B
Session storage	0 b
Network Information API	unknown

Resource Hints
preconnect
https://upload.wikimedia.org/
https://en.wikipedia.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
Apache Traffic Server 9.2.11	100	Web servers
HSTS	100	Security
HTTP/2	100	Miscellaneous

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 class="central-featured-logo" src="portal/wikipedia.org/assets/img/Wikipedia-logo-v2.png" srcset="portal/wikipedia.org/assets/img/Wikipedia-logo-v2@1.5x.png 1.5x, portal/wikipedia.org/assets/img/Wikipedia-logo-v2@2x.png 2x" width="200" height="183" alt="">
Render time	827 ms
Element render delay	94 ms
TTFB	514 ms
Resource delay	80 ms
Resource load duration	138 ms
Load time	779 ms
URL	https://www.wikipedi...pedia-logo-v2.png
Size (width*height)	36600
DOM path
main > div:eq(0) > img> main > div:eq(0) > img>

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.

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.

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

Screenshots

afterPageCompleteCheck.jpg

largestContentfulPaint.jpg