Run 3 summary

Summary

Metric	Value
Page metrics
Performance score	98
Total page size	216.7 KB
Requests	15
Timing metrics
TTFB	113 ms
First Paint	365 ms
Fully Loaded	671 ms
Google Web Vitals
TTFB	113 ms
First Contentful Paint (FCP)	365 ms
Largest Contentful Paint (LCP)	403 ms
Cumulative Layout Shift (CLS)	0.00
Visual Metrics
First Visual Change	366 ms
Speed Index	395 ms
Visual Complete 85%	400 ms
Visual Complete 99%	466 ms
Last Visual Change	466 ms

Waterfall

Video

Filmstrip

Use--filmstrip.showAll to show all filmstrips.

0 s

0.4 sFirst Contentful Paint 365 msFirst Visual Change 366 msVisual Complete 85% 400 msVisual Complete 95% 400 ms

0.5 sLCP <DIV> 403 msDOM Content Loaded Time 412 msPage Load Time 444 msLast Visual Change 466 msVisual Complete 99% 466 ms

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 92
• Performance score 98
• Privacy score 87
• Best practice score 83

Performance advice (98)

Show/hide details

Title	Advice	Score
Don't scale images in the browser (avoidScalingImages)	The page has 1 image 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.	90
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://www.pagerduty.com/wp-content/themes/citizens-band/images/logos/opscloud.png
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 541 B 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://www.pagerduty.com/wp-content/themes/citizens-band/favicon/public/manifest.webmanifest
Avoid too many fonts (fewFonts)	The page has 3 font requests. Do you really need them? What value does the fonts give the user?	70
Description: How many fonts do you need on a page for the user to get the message? Fonts can slow down the rendering of content, try to avoid loading too many of them because worst case it can make the text invisible until they are loaded (FOIT—flash of invisible text), best case they will flicker the text content when they arrive.
Offenders: https://www.pagerduty.com/fonts/PlainRegular-Regular.woff2 https://www.pagerduty.com/fonts/PlainBold-Regular.woff2 https://www.pagerduty.com/fonts/PlainThin-Regular.woff2
Avoid using incorrect mime types (mimeTypes)	The page has 2 misconfigured mime types.	98
Description: It's not a great idea to let browsers guess content types (content sniffing), in some cases it can actually be a security risk.
Offenders: https://sessions.bugsnag.com/ https://www.pagerduty.com/wp-content/themes/citizens-band/favicon/public/manifest.webmanifest
Make each CSS response small (optimalCssSize)	https://www.pagerduty.com/wp-content/themes/citizens-band/css/app3.css?ver=4a7f77ad876c6ab54228ca76dffac5a5f4f6f989 size is 20.3 kB (20297) and that is bigger than the limit of 14.5 kB. Try to make the CSS files fit into 14.5 KB.	90
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://www.pagerduty.com/wp-content/themes/citizens-band/css/app3.css...band/css/app3.css 19.8 KB 111.2 KB

Best practice advice (83)

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Title	Advice	Score
Meta description (metaDescription)	The meta description is too long. It has 185 characters, the recommended max is 155	50
Description: Use a page description to make the page more relevant to search engines.
Page title (pageTitle)	The title is too long by 14 characters. The recommended max is 60	50
Description: Use a title to make the page more relevant to search engines.
Avoid too many third party requests (thirdParty)	The page do 20% requests to third party domains (3 requests and 13.7 kB). First party is 12 requests and 208.2 kB. The regex .*pagerduty.* 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 4 responses that sets both a max-age and expires header. There are 13 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://www.pagerduty.com/04-home-base-tidy-no-ext-scripts.html https://www.pagerduty.com/04-home-base-tidy-no-ext-scripts.html https://www.pagerduty.com/wp-content/themes/citizens-band/js/build/layout-www-de...ww-default.min.js https://www.pagerduty.com/wp-content/themes/citizens-band/css/app3.css...band/css/app3.css https://www.pagerduty.com/wp-content/themes/citizens-band/images/logos/opscloud.png https://www.pagerduty.com/wp-content/themes/citizens-band/js/build/page-www-home...e-www-home.min.js https://www.pagerduty.com/wp-content/themes/citizens-band/js/build/navigation-v3...igation-v3.min.js https://www.pagerduty.com/fonts/PlainRegular-Regular.woff2 https://www.pagerduty.com/fonts/PlainRegular-Regular.woff2 https://www.pagerduty.com/fonts/PlainBold-Regular.woff2 https://www.pagerduty.com/fonts/PlainBold-Regular.woff2 https://www.pagerduty.com/fonts/PlainThin-Regular.woff2 https://www.pagerduty.com/fonts/PlainThin-Regular.woff2 https://d2wy8f7a9ursnm.cloudfront.net/v7/bugsnag.min.js https://www.pagerduty.com/wp-content/themes/citizens-band/favicon/public/manifest.webmanifest https://www.pagerduty.com/wp-content/themes/citizens-band/favicon/public/icon.svg https://www.pagerduty.com/wp-content/themes/citizens-band/favicon/public/favicon.ico

Privacy advice (87)

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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.pagerduty.com/04-home-base-tidy-no-ext-scripts.html
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.pagerduty.com/04-home-base-tidy-no-ext-scripts.html
Do not share user data with third parties. (thirdPartyPrivacy)	The page has 20% requests that are 3rd party (3 requests with a size of 13.7 kB). The page do 3 utility requests and uses 1 utility tool.	80
Description: Using third party requests shares user information with that third party. Please avoid that! The project https://github.com/patrickhulce/third-party-web is used to categorize first/third party requests.
Offenders: https://d2wy8f7a9ursnm.cloudfront.net/v7/bugsnag.min.js https://sessions.bugsnag.com/ https://sessions.bugsnag.com/

Page info

Page info
Title	PagerDuty | Real-Time Operations | Incident Response | On-Call | PagerDuty
Width	360
Height	8428
DOM elements	1993
Avg DOM depth	10
Max DOM depth	20
Iframes	0
Script tags	10
Local storage	45 B
Session storage	0 b
Network Information API	4g

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
WordPress	100	CMS Blogs
MySQL	100	Databases
PHP	100	Programming languages
Google Cloud	100	IaaS
Amazon Web Services	100	PaaS
WP Engine	100	PaaS Hosting
Google Cloud CDN	100	CDN
Cloudflare	100	CDN
Amazon CloudFront	100	CDN
HTTP/3	100	Miscellaneous

Data collected using Third Party Web 0.24.0

Utility
Bugsnag

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	DIV
Element/tag	<div class="col-start-main-start col-end-main-end relative flex flex-col justify-center items-center"></div>
Render time	403 ms
Load time	0 ms
Size (width*height)	29380
DOM path
main > section:eq(0) > div:eq(0) > div:eq(1)> main > section:eq(0) > div:eq(0) > div: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.

Long Animation Frames

Read more about the Long Animation Frames API here here.

The top 10 longest animation frames entries

Server timings

There are no 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

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

Requests loaded after onLoad event

Included requests done after load event end.

Requests loaded after onContentLoad

Includes requests done after DOM content loaded.

Third party

Third party requests categorised by Third party web version 0.24.0.

Third party requests and tools

First party requests and sizes per content type

Calculated using .*pagerduty.* (use --firstParty to configure).

Third party requests and sizes per content type

Screenshots

afterPageCompleteCheck.png

layoutShift.png

largestContentfulPaint.png