iiinova — where your digital self keeps evolving

When the person who walks your dog is really into Halloween…

A pretty white dog dressed up for Halloween, wearing a black witch’s hat and a purple tutu.

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This screencap from It’s Always Sunny will never not make me laugh out loud. Thanks @webx.bsky.social! #PerfNow #IYKYK

Classic image of Charlie from the tv show It’s Always Sunny in Philadelphia standing in front of a whiteboard covered in conspiracy theory scribbling.

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@andydavies.me on stage at #PerfNow talking about why identifying INP issues can be like finding a needle in a haystack. Heatmaps (like the one onscreen behind him) can help. Learn more about heatmaps: www.speedcurve.com/blog/new-hea...

Performance expert Andy Davies on stage at the performance.now conference in Amsterdam.

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@andydavies.me shares a compelling correlation chart. As LoAF duration gets worse, so does the number of pages visited during a session. #PerfNow

SpeedCurve performance expert Andy Davies on stage at the performance.now conference in Amsterdam.

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We’re shipping more and more and more JavaScript. And the problem is only going to get worse as most AI-generated web pages are built on JS frameworks. @speedcurve.com performance expert @andydavies.me at #PerfNow

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“We are the user’s line of defence” between automated tools that don’t offer accountability. @tkadlec.bsky.social at #PerfNow

Performance expert Tim Kadlec on stage at the performance.now conference in Amsterdam.

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Good morning and happy Halloween, #PerfNow friends! So excited about Day 2! If you’d like to chat about #webperf and #ux, come chat with @andydavies.me and @cliffcrocker.bsky.social and me from Team @speedcurve.com. And I still have plenty of Halloween goodies! Trick or treat!

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@ethangardner.com shares some harsh real user feedback about slow sites that we can use to show non-performance folks why site speed matters. #PerfNow

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Sharing raw metrics with stakeholders isn’t enough. Instead, share clear problem statements. @ethangardner.com at #PerfNow

Performance expert Ethan Gardner on stage at the performance.now conference.

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The estimated cost of legacy JavaScript = 37,000,000 trees. @inesakrap.bsky.social at #perfnow

Ines Akrap on stage at the performance.now conference in Amsterdam.

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“If my project was a bridge, would I dare cross it?” @inesakrap.bsky.social at #perfnow Have a good think about that before you answer.

Web performance expert Ines Akrap on stage at the performance.now conference.

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“What if we measured performance by the number of keyboard commands it took to complete a task on a website?” @marcysutton.com at #PerfNow

Accessibility expert Marcy Sutton Todd on stage at the performance.now conference in Amsterdam.

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Tammy Everts 🍁 @tammyeverts.com · 14/10/2025

@marcysutton.com on the #PerfNow stage sharing her wealth of wisdom about the intersection of #webperf and #a11y — such a gift!

Accessibility expert Marcy Sutton Todd on the stage at the performance.now conference in Amsterdam.

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This is just one snippet among many I could've pulled from this powerful piece by Catherine Jue: www.catherinejue.com/fast

Quote from Catherine Jue: "Fast eliminates cognitive friction. Raycast surfacing the right application before you finish typing feels like an extension of your mind. Superhuman's sub-100ms rule — plus their focus on keyboard shortcuts — changed the email game in a way that no one's been able to replicate, let alone beat... No one praises these tools explicitly for their speed. They just feel magical."

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Tammy Everts 🍁 @tammyeverts.com · 25/09/2025

The only thing worse than being forced to get support from a chatbot... is when even the chatbot doesn't want to help you.

A screenshot of a chatbot window, with the following message:

"Hello! I am your AI assistant ready to help you. How can I guide you today?"

This is followed by the deflating message:

"All chat agents are currently busy."

Tammy Everts 🍁 @tammyeverts.com · 18/09/2025

Years ago, when I was fretting about something or other, my son (who was around ten years old) quoted this to me. It was exactly what I needed to hear at the time. Maybe you need to hear it today? (Fast forward ten years. My son and I designed this poster for his university dorm room.)

Stephen Hawking quote: "“One of the basic rules of the universe is that nothing is perfect. Perfection simply doesn't exist. Without imperfection, neither you nor I would exist."

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Tammy Everts 🍁 @tammyeverts.com · 02/09/2025

One of the fun things about taking holiday time is sitting back at my desk, looking at my monitor, and asking myself "What is it I do again?" If this sounds like you — and you care about site speed and UX — here's a quick refresher! 👉 👉 Web Performance Guide: www.speedcurve.com/web-performa...

Friendly-looking humanoid alien – we call him Herman – sitting on a park bench, using the internet on his laptop.

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Tammy Everts 🍁 @tammyeverts.com · 18/08/2025

In today’s edition of “Guess That Unresponsive App”… Guess this app that would’ve been really helpful — and potentially lifesaving — to access when my family and I were hiking in the mountains yesterday… but which didn’t work because we were on 3G.

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Tammy Everts 🍁 @tammyeverts.com · 29/07/2025

Cherishing every beach day with my 13-year-old girl.

A very pretty white dog with perked-up ears standing on a sandy beach on a sunny day.

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Tammy Everts 🍁 @tammyeverts.com · 10/07/2025

Me too! I had mine all picked out.

Woodcut illustration of a star-nosed mole, a small mammal with large front claws and tentacle-like appendages around its nose.

Tammy Everts 🍁 @tammyeverts.com · 10/07/2025

When you write a tech book, you don't do it for 💰💰. You do it to share a topic you're passionate about. When I get a royalty for my book, I don't think "Time to go shopping!" I think "Folks want to learn about one of my favourite topics!" If you've read my book, thank you! I'd love your feedback!

A blue book cover. The title of the book is Time is Money: The Business Value of Web Performance". The author is Tammy Everts.

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Tammy Everts 🍁 @tammyeverts.com · 04/07/2025

I love that idea. Also thinking the Google Maps folks could add 4G Fridays.

Screenshot of Google Maps skeleton screen, showing how content doesn’t render with an LTE connection.

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Tammy Everts 🍁 @tammyeverts.com · 04/07/2025

Ah… 3G my old friend. (Posted after returning to LTE territory.)

Screenshot of LinkedIn skeleton page, not rendering because device is on a 3G connection.

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Tammy Everts 🍁 @tammyeverts.com · 30/06/2025

Travelling around rural Ontario means I’m in one-bar territory. FYI, this is what JS-bloated sites and apps look like.

A screenshot of an unresponsive web page, which is blank except for a progress indicator.

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Tammy Everts 🍁 @tammyeverts.com · 20/06/2025

Usability poll: If you wanted to translate French text to English, which field would you paste the text into? 👈 Left 👉 Right (If you already know the answer, please don't reply.)

Screenshot of Google Translate for French-to-English translation.

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Tammy Everts 🍁 @tammyeverts.com · 20/06/2025

Feeling overwhelmed by which #webperf / #ux metrics to track? Then this chart is for you. As you can see, there's no single perfect 🦄 metric – and each one has caveats – but if you start with this set, you'll cover a lot of important bases. Learn more here: www.speedcurve.com/web-performa...

A table that shows how a handful of web performance metrics – Time to First Byte, Start Render, Largest Contentful Paint, Cumulative Layout Shift, and Interaction to Next Paint – stack up against these criteria:

Correlates with meaningful content in the browser.
Usable out of the box.
Broad browser support.
Available in both synthetic and real user monitoring.
Correlates to business and UX metrics (like conversions and bounce rate).

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Tammy Everts 🍁 @tammyeverts.com · 10/06/2025

There are SO MANY #webperf charts! If you feel overwhelmed, start with these three: CORRELATION CHART – #sitespeed and business metrics WATERFALL CHART – how and when elements on your page render, so you can see why pages are slow COMPETITIVE BENCHMARKS – how fast you are compared to competitors

Three popular web performance charts.

1. Correlation chart that shows the relationship between page speed metrics, like start render or Largest Contentful Paint, and business metrics, like conversion rate.

2. Waterfall chart that shows a visual timeline of all the resources on a web page, from HTML to images to JavaScript, as they're loaded and rendered in the browser.

3. Competitive benchmarks chart is a leaderboard that ranks your site alongside your competitors, so you can see who's faster and who's slower.

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Tammy Everts 🍁 @tammyeverts.com · 06/06/2025

Orwell wrote this in 1946. Despairing of the English language isn't new. The only thing that's new is *how* we're failing. These days it's AI slop, lazy sales copy, and disinformation. Words only matter if we make them matter. We need to do better. www.orwellfoundation.com/the-orwell-f...

Screenshot of an excerpt from George Orwell's essay "Politics and the English Language". The excerpt reads:

"Each of these passages has faults of its own, but, quite apart from avoidable ugliness, two qualities are common to all of them. The first is staleness of imagery; the other is lack of precision. The writer either has a meaning and cannot express it, or he inadvertently says something else, or he is almost indifferent as to whether his words mean anything or not. This mixture of vagueness and sheer incompetence is the most marked characteristic of modern English prose, and especially of any kind of political writing. As soon as certain topics are raised, the concrete melts into the abstract and no one seems able to think of turns of speech that are not hackneyed: prose consists less and less of words chosen for the sake of their meaning, and more and more of phrases tacked together like the sections of a prefabricated hen-house. I list below, with notes and examples, various of the tricks by means of which the work of prose-construction is habitually dodged."

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Tammy Everts 🍁 @tammyeverts.com · 06/06/2025

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.

Screenshot of a section of a tech blog post. the text reads:

What Are Core Web Vitals?
Core Web Vitals refer to a certain set of measurable metrics that Google applies to judge whether end-user experience on your site is in reality satisfactory. These Core Web Vitals consist of the following three operating parameters beginning in 2025:

1. Largest Contentful Paint (LCP)
Measures loading performance. Specifically, it gauges the time it takes for the most significant visible content component (like an image or title) to display to the user.

Good score: Anything less than 2.5 seconds!
2. Engagement to Upcoming Render (EUR) (launched in 2024, substituting FID)
Measures responsiveness. It essentially measures the input delay; hence, it considers the maximum input delay.

Good score: Under 200 milliseconds
3. Cumulative Layout Shift (CLS)
Measures the visual stability of a page. It tracks how much content shifts unexpectedly during page load.

Good score: Less than 0.1
Having these metrics are essential to ensure a seamless, frustration-free experience under every device and connection type.

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Tammy Everts 🍁 @tammyeverts.com · 04/06/2025

I do a LOT of talks about the connection between site speed, UX, and business success. The version I gave at @webexpo.bsky.social is my favourite so far. You can watch it here: slideslive.com/39043166 Topics included: 👉 Web stress 👉 Measuring business impact 👉 Optimizing the critical rendering path

Split-screen image of me, Tammy Everts, a white woman with brown hair, standing on stage at the WebExpo Conference in Prague, with a slide from my talk alongside. The slide reads: "Web Stress: When apps or sites are slow, we concentrate up to 50% harder to stay on task."

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Tammy Everts 🍁 @tammyeverts.com · 29/05/2025

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!

Performance expert Tim Kadlec on stage at the WebExpo conference in Prague.

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Tammy Everts 🍁 @tammyeverts.com · 28/05/2025

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

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Tammy Everts 🍁 @tammyeverts.com · 28/05/2025

Good morning #WebExpo friends! The pigeons and I have already been up for hours — 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!

Old buildings in central Prague, shortly after sunrise.

Tammy Everts 🍁 @tammyeverts.com · 26/05/2025

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.

Ominous dark thunder clouds above an historic building in Prague.

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Tammy Everts 🍁 @tammyeverts.com · 15/05/2025

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-...

Five very cute puppies wearing party hats.

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Tammy Everts 🍁 @tammyeverts.com · 12/05/2025

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

Side-by-side snapshots of two points on the page rendering timeline for Lufthansa.com on a mobile device. The Start Render frame is mostly empty at 3.9 seconds. The Largest Contentful Paint frame shows a consent banner at 21.75 seconds.

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Tammy Everts 🍁 @tammyeverts.com · 08/05/2025

Yep, cookie banners delay LCP for 6/10 of the pages we track in this leaderboard. It's slightly less of an issue for desktop, but definitely still an issue: app.speedcurve.com/benchmarks/e... @cliffcrocker.bsky.social talks about it in this post: www.speedcurve.com/blog/web-per...

Leaderboard showing rendering timelines for 10 leading travel sites, tanked from fastest to slowest Largest Contentful Paint time. Trivago is fastest and Kayak is slowest.

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Tammy Everts 🍁 @tammyeverts.com · 08/05/2025

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. 😬 👉 Page Speed Benchmarks: app.speedcurve.com/benchmarks/e...

Screenshot of the Page Speed Benchmarks leaderboard for travel sites in the EU and UK. It consists of a set of stacked rendering filmstrips, ranging from fastest to slowest website. The fastest is Trivago. The slowest is Lufthansa.

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Tammy Everts 🍁 @tammyeverts.com · 07/05/2025

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...