Why Google's Chrome UX report does not always match the Google Search Console core web vitals report https://www.seroundtable.com/google-chrome-ux-vs-search-console-report-39962.html explained by @tunetheweb

What defines great Shopware performance?

In this episode of @shopcastfm, @beberlei shares key takeaways from benchmarking 700+ stores:

- Core Web Vitals explained

- Real-world tips for faster UX

- Plugin pitfalls and hosting choices

Listen: https://shopcast.fm/casts/057-shopware-6-performance/
Watch: https://www.youtube.com/watch?v=46k1NpnAjfE

In GSC Core Web Vitals report focus on the URLs with problems, not on the absolute amount of URLs, says @johnmu

https://www.seo-suedwest.de/9878-google-bei-core-web-vitals-nicht-auf-anzahl-sondern-auf-urls-mit-problemen-achten.html

Hey guys, we’re ready for Sunday.
We checked the WebPerformance of Red Hat’s website before Sunday’s delivery. Everything looks good!
Take a look at the report:
https://webperformancereport.com/report/wpt/250620_ZiDcRA_7RQ?utm_source=webperfreport&utm_medium=mastodon
#webperf #crux #corewebvitals #ux #seo #redhat #tech

We great people building apps that empower other folks to use our tools! The new open‑source #Magento module – from @jesperingels and the team at Bluebird Day – lets you integrate our real user monitoring into your Magento project in minutes – no coding required!

Discover the benefits of gathering real user data, plus how to get started: https://www.speedcurve.com/blog/real-user-monitoring-magento/

Exciting news for our Shopify customers! Now it's easy to enable RUM in your storefront – no coding or dev time required!

With the SpeedCurve RUM app – developed by our friend and Shopify expert @sia – you can:

Track metrics like Core Web Vitals
Identify and fix performance issues
Measure the impact of site speed on business metrics, like conversion rate
Fight regressions and stay ahead of page slowdowns

https://www.speedcurve.com/blog/speedcurve-rum-shopify/

We checked the WebPerformance of Nintendo's website before Sunday’s delivery. Everything looks good!
Take a look at the report:
https://webperformancereport.com/report/wpt/250606_BiDc9T_EET?utm_source=webperfreport&utm_medium=mastodon
#webperf #crux #corewebvitals #ux #seo #nintendo

AI had a fever dream about a brand-new Core Web Vital.

I'm not going to call out the tech company blog where I saw this. I'm posting it as a cautionary tale about using ChatGPT to write about subject matter that's outside your wheelhouse.

Finally, the definitive explainer for Long Animation Frames! Not sure what Long Animation Frames (aka LoAF) are, nor why they're crucial for quantifying and optimizing the JavaScript that's hurting your user experience? This brilliant guide by @andydavies covers:

Why frame rate matters
Anatomy of a LoAF
Key LoAF milestones & what to do with milestone data
How to connect LoAF & INP data
How to get started

https://www.speedcurve.com/blog/guide-long-animation-frames-loaf/

I do a LOT of talks about the connection between site speed, UX, and business success. The version I gave at @webexpo last week is my favourite so far. You can watch it here: https://slideslive.com/39043166

Topics included:

Quantifying "web stress"
Measuring business impact
Optimizing the critical rendering path

Thanks again to everyone who came to my #WebExpo talk about the intersection of site speed, UX, and business metrics – and how to make a data-driven business case for investing in web performance. And thank you to Šárka and Steven for inviting me! I had a wonderful time!

My slides are up. If you have any questions or feedback, I'd love to hear from you!

https://speakerdeck.com/tammyeverts/connecting-the-dots-between-site-speed-user-experience-and-your-business-webexpo-2025

There's a lot to unpack with the Long Animation Frames (LoAF) API! This excellent guide from Andy Davies covers:

Why animation frame rate matters for #webperf and #ux
Anatomy of a LoAF
Key LoAF milestones and what to do with milestone data
Script attribution
How to match script data to INP, including sub-parts
How to capture LoAF entries
How to get started with LoAF!

https://www.speedcurve.com/blog/guide-long-animation-frames-loaf/

A surprising number of people aren't aware that the consent banners on their pages hurt #ux and #seo. That's because consent banners delay LCP for a lot of pages.

The result? Your visitors have a slow experience, which sucks for them. And because LCP is a Google search ranking factor, it also sucks for you.

@cliff explains the most common problems – and their workarounds – with measuring #pagespeed with consent managers: https://www.speedcurve.com/blog/web-performance-cookie-consent/

Page Speed Benchmarks tracks top travel sites in the EU and UK, including Trivago, Airbnb, TripAdvisor, Priceline, Skyscanner, and more.

While it was great to see our friends at Trivago with a 2.5s LCP time, many other sites struggled with:

Slow/blocking JS & CSS
Non-performant custom fonts
Excessive JS before the LCP element

https://app.speedcurve.com/benchmarks/europe/travel/slow/largest-contentful-paint/

I've lost track of how many times I've struggled with slow travel sites on my phone as I've checked for airline updates or hotel check-in details. (Jet lag doesn't help!)

Unfortunately, of the ten EU/UK travel sites we track, only one site – Trivago – starts to render within 2s and has a Largest Contentful Paint time within 2.5s.

Explore Page Speed Benchmarks: https://app.speedcurve.com/benchmarks/europe/travel/slow/largest-contentful-paint/

Track your site's speed: https://www.speedcurve.com/signup/

How well do you know common #webperf metrics? For example, did you know...

INP is only available in RUM and not supported in Safari?
LCP is not reliable in SPAs?
User Timing is available across all browsers?

Test your knowledge: https://www.speedcurve.com/web-performance-guide/glossary-of-web-performance-metrics/

The latest issue of Speed Matters is out! If you're not a subscriber yet, you can read it in its entirety here (and if you like it, sign up to receive next month's edition in your inbox).

https://www.speedcurve.com/newsletter/51-new-crux-vs-rum-real-world-inp-fixes-making-performance-allies-fastest-and-slowest-travel-sites/

WebPerformance Report Week #17 is out and today we celebrate a new milestone!
For the first time, we delivered two reports in one day:
Web Performance Report
HTTP Header Security Report
https://webperformancereport.com/
#webperf #corewebvitals #ux #seo #cybersecurity #websecurity

There are so many things I love about SpeedCurve's Vitals dashboard...

Key metrics – Backend, FCP, TBT – alongside Core Web Vitals (because #CoreWebVitals are not enough!)
Defines each metric, including browser support
13 months of data!
Explore INP and LCP subparts
Detailed diagnostics for each metric

Believe it or not, there's more. Sign up (for free) and check it out for yourself: https://www.speedcurve.com/signup/

Let me know if you have any questions or feedback!

Few things frustrate me more than feeling like I've done everything right, but nothing got better.

Say you've done all the right things. You've lazy-loaded and compressed and minified. You've seen improvements to Start Render or LCP or INP. But bounce rate didn't improve. Neither did conversion rate or any other business metric you care about. WHY???

The answer might lie on the performance plateau.

https://www.speedcurve.com/blog/web-performance-plateau/