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tammyeverts.com
I contain multitudes, but for brevity: reader, writer, speaker, baker, quilter, yoga-er, mom-joke teller, lover of lakes and mountains. Fighting the good #UX / #webperf fight as CXO at @speedcurve.com & co-chair of @perfnow.bsky.social.
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πŸŽ₯ Missed #WebExpo 2025 or already feeling nostalgic? We’ve got you. The first 29 talks from the conference are now live and ready to watch! ▢️ Watch now: slideslive.com/webexpo/webe... Massive thanks to genlive for making the videos available so quickly πŸ™Œ

My #WebExpo2025: AI, WebPerf & People β€” @tej.as – Web as food for AI, UI revolution β€” TomΓ‘Ε‘ Čupr – CEOs, AI, FOMO β€” @tammyeverts.com – Slow websites still hurt after users leave β€” @tkadlec.bsky.social – Core Web Vitals are just the start Thanks to Ε Γ‘rka and the @webexpo.bsky.social team!

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 #webperf. My slides are up. I'd love to hear your questions and feedback! speakerdeck.com/tammyeverts/...

This is a fun surprise! Love seeing @tkadlec.bsky.social using a @speedcurve.com chart in his #WebExpo talk to illustrate a quick LCP win!

Also for all you #WebExpo folks… I’d love to help you try synthetic and real user monitoring, so you can see how fast your site is, how fast you should be, and how to communicate your wins! You can try SpeedCurve for free: www.speedcurve.com/signup/

Hey #WebExpo friends! Thanks so much for coming to my talk. 😊 I’ll be uploading my slides soon. Until then, if you have any questions, let me know! I’m around for the rest of the conference, and I’d love to chat.

This is why you should never skip the opening remarks at a conference. #WebExpo

Good morning #WebExpo friends! The pigeons and I have already been up for hours β€” in my case thanks to the 9-hour time zone difference between here and western Canada, and I’m raring to go! Ask me how I feel in a few hours, though… If you’re looking for a friendly face to talk to, come and say hi!

I’m in Prague for @webexpo.bsky.social this week, and I must say that the sky is doing a fantastic job of complementing the architecture.

There's a lot to unpack with the Long Animation Frames (LoAF) API! This excellent guide from @andydavies.me includes: 🎞️ Why animation frame rate matters for #webperf & #ux 🎞️ Anatomy of a LoAF 🎞️ How to get started! www.speedcurve.com/blog/guide-l... #corewebvitals #sitespeed #pagespeed

Finally, a LoAF explainer I understand! The LoAF API is a leap forward for RUM. It lets us find and fix the third parties and other JS that hurts #pagespeed and #UX. The catch? It's tricky to understand. But no longer, thanks to this piece by @andydavies.me! www.speedcurve.com/blog/guide-l...

So much juicy stuff – including the introduction of an exciting new experimental metric, Total Blocking Duration – in this LoAF release!

We add a new hero each month. Follow to see who's next! Alex Russell @infrequently.org Sergey Chernyshev @sergeyche.dev Annie Sullivan @anniesullie.com Pat Meenan @patmeenan.com Sia Karamalegos @sia.codes Estela Franco @guaca.bsky.social Paul Calvano @paulcalvano.bsky.social go.bsky.app/FTbRtFk

On the eve of my eighth (!!!) anniversary as a SpeedCurver, I wrote up this ode to the biggest little company I've ever had the privilege to be part of: www.linkedin.com/pulse/eight-...

Calculating downtime loss is pretty simple: if your site averages $100K/hour in revenue and you suffer a 3-hour outage, you lost ~$300K. Calculating loss due to #sitespeed is a bit trickier, but doable. Here's one formula you can use: www.speedcurve.com/blog/downtim... #webperf #ux #pagespeed

Consent banners delay LCP for a lot of pages, especially on mobile. Slower LCP times hurt #UX and #SEO. @cliffcrocker.bsky.social explains the most common problems – and their workarounds – with measuring #webperf with consent managers: www.speedcurve.com/blog/web-per... #corewebvitals

How well do you know common #webperf metrics? Did you know: πŸ’‘ INP is only available in RUM and not supported in Safari? πŸ’‘ LCP is not reliable in SPAs? πŸ’‘ User Timing is available across all browsers? Test your knowledge: www.speedcurve.com/web-performa... #sitespeed #pagespeed #corewebvitals #ux

Thanks for the shout-out, Joan! We agree – the Vitals heatmap is a crucial tool for debugging INP and LCP issues! πŸš€ Tim Kadlec (@tkadlec.bsky.social) wrote this great post that walks through how to use the heatmap, for anyone who's interested in learning more: www.speedcurve.com/blog/providi...

#WebPerfTip RUM's web performance tools help us identify performance issues; please use IDs on the most important elements (elements that can potentially affect the UX) to assist us in debugging web performance #WebPerf #Performance #WebPerfTools

So many times I've struggled with slow travel sites on my phone while checking flight updates or hotel check-in details. Sadly, 9 out of 10 EU/UK travel sites we track serve pages that don't meet Google thresholds for "good" #webperf. 😬 πŸ‘‰ Page Speed Benchmarks: app.speedcurve.com/benchmarks/e...

Page Speed Benchmarks tracks top travel sites in the EU and UK, including Trivago, Airbnb and Skyscanner. Great to see our friends at Trivago with 2.5s LCP! Many sites struggled with: 🐌 Slow/blocking JS, CSS & custom fonts 🐌 Excessive JS before the LCP element app.speedcurve.com/benchmarks/e...

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). www.speedcurve.com/newsletter/5... #webperf #ux #seo #sitespeed #pagespeed #corewebvitals

We ❀️ this new open‑source module from Bluebird Day! Integrate real user monitoring into your Magento project in minutes: github.com/bluebirdday/... πŸš€ Track Core Web Vitals & other metrics πŸš€ Measure impact of #webperf on your business πŸš€ Fight #ux regressions with budgets & alerts πŸš€ Get diagnostics

Generic thresholds are not one-size-fits-all. Google's LCP threshold is 2.5s. But for this site, conversion rate drops after 1.1s. By 2.5s, the site is on the #webperf plateau. This is why you need your own user data to set #pagespeed and #ux goals. How it works: www.speedcurve.com/blog/site-sp...

Here's why you MUST rely on your own user data to set #pagespeed and #ux goals. Google's LCP threshold is 2.5s. Yet for this site, conversion rate declines after 1.1s. By 2.5s, this site is on the #webperf plateau. Learn why correlation charts are your friend: www.speedcurve.com/blog/site-sp...

Just queued up the next edition of Speed Matters to go out next week. So much #webperf and #ux goodness! I know I say this every month, but every month it's a fact. Browse the archive and sign up here (I promise we will NEVER spam you): www.speedcurve.com/newsletter/

Hey friends! I'm so stoked to be talking about the intersection of site speed, user experience, and business outcomes at WebExpo (@webexpo.bsky.social) in Prague later this month! Use the promo code TAMMY25 to get a 15% discount on your pass. Info + tickets: webexpo.net/prague2025/s...

Delivering a fast #UX boosts every metric retailers care about – conversions, revenue, retention & brand perception. This guide covers how to: πŸ’° Measure impact of page speed on your business πŸ’Έ Benchmark your site against competitors πŸ› οΈ Find and fix #webperf issues www.speedcurve.com/web-performa...

Is CrUX the same as RUM? We get this question a lot! This short article breaks down the differences. (The biggest distinction: CrUX is only collected from Chrome browsers, so you could be missing a lot of traffic.) support.speedcurve.com/docs/speedcu... #webperf #ux #sitespeed #pagespeed

0.52% of Chrome users use versions that are 5-10 years old. Doesn't sound like much? With an estimated 3.5B Chrome users worldwide, that's more than 18M people! Learn more about this and five other factors that slow down user-perceived performance of your site: www.speedcurve.com/blog/six-thi...

If you're a #webperf oriented dev/engineer/SEO/UX person, you probably already know a lot of the stuff in this guide... so we put everything in one place for you to share with other folks in your retail org, who might need a crash course in why page speed matters.

I was an Onion subscriber back in the early '90s, when it was only available in print. I've been a loyal reader ever since. Anyone who thinks it's "just" satirical news needs to go away and learn about the importance and necessity of good satire in a functional society.

A pro-Poilievre misinformation campaign from the U.S. has been uncovered. The Financial Times is reporting that thousands of fake accounts from the U.S. are boosting Poilievre and attacking Carney. #Canadians are being bombarded on X, Facebook, and TikTok with U.S. misinformation. #CBC #cdnpoli

We ❀️ our customers! Check out these case studies and find out how companies like Pinterest, Trivago, Airbnb, Zillow, BBC, GOV.UK, and The Guardian have used us to monitor their #UX and #webperf, speed up their sites, increase user happiness, and improve their business! www.speedcurve.com/customers/

Ever wondered why your business and engagement metrics didn't improve after you sped up your pages? You need correlation charts. πŸ‘ Validate your #webperf & #UX metrics πŸ‘ Identify your site's "performance plateau" πŸ‘ Spot performance-blocking trends on your pages www.speedcurve.com/blog/site-sp...

Byte for byte, no resource affects page speed more than JavaScript. This guide walks you through essential techniques for reducing the negative impact of JS on your pages. www.speedcurve.com/web-performa... #webperf #javascript #js #ux #pagespeed #sitespeed

In the past year, median JavaScript weight has increased by 10% – to almost 650KB across 22 scripts per page! That's a lot of potential for hurting the speed of your pages. Click through to make sure you're following these best practices for optimizing JS.

Slow-loading pages could have 2X more impact on revenue than site outages. This post covers how to: πŸ‘‰ Calculate losses due to site slowdowns πŸ‘‰ Compare those losses to downtime losses πŸ‘‰ Estimate lost customer lifetime value www.speedcurve.com/blog/downtim... #webperf #ux #sitespeed #pagespeed

My cat is only medium-haired, but I feel like he really puts in the extra effort.

We ❀️ our customers! Check out these case studies and find out how companies like Pinterest, Trivago, Airbnb, Zillow, BBC, GOV.UK, and The Guardian have used us to monitor their #UX and #webperf, make their sites faster, and improve their business! www.speedcurve.com/customers/