iiinova — where your digital self keeps evolving

Karlijn Löwik @karlijnlowik.bsky.social · 02/10/2026

Ready for Fronteers Dark Mode, lights going off now 😄

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Karlijn Löwik @karlijnlowik.bsky.social · 15/09/2026

High on anesthesia from getting my wisdom tooth removed, let me share you a classic case of my bad sense of humor😉

Même: Forrest Gump asking Captain Jack Sparrow what he's drinking. The answer is RUM, forest, RUM

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Karlijn Löwik @karlijnlowik.bsky.social · 12/08/2026

Watching the eclipse today from our balcony in Groningen, the Netherlands. Really cool, and very clear sky! 😀

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Karlijn Löwik @karlijnlowik.bsky.social · 02/04/2026

So proud of our team! RUMvision 2.0 is live - a total rewrite from the ground up. We're making web performance actionable so every click counts. New UI, API, and automated to do's (with fixes) on your real-time data. Happy but tired now 😉 www.rumvision.com/blog/launch-...

rumvision.com

Launch RUMvision 2.0 - the future of RUM is here!

Real User Monitoring

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Fronteers @fronteers.bsky.social · 15/02/2026

+++ Tickets are now on sale for Fronteers Dark Mode 2026! 🥳 +++ 📍 Oct 2 · Cinema de Witt, Dordrecht 🕒 3PM – ~midnight 🎤 5 talks 🍽️ 2-course dinner included Relaxed after-work vibes, long breaks & great conversations. 🎟️ €99 👉 fronteersconf.org (Fronteers members: €49)

Promotional banner for “Fronteers Dark Mode” with the headline “Friday night. Frontend. Fronteers Dark Mode!” in bold black text on a bright yellow speech-bubble shape. Below it, the text invites people to join on Friday, October 2nd 2026, at Cinema De Witt in Dordrecht for an intimate evening of frontend talks and community vibes from 3PM to after midnight. The background shows a lively evening courtyard scene outside a cinema, with people sitting at tables, chatting under warm string lights, and a modern glass entrance glowing in the night. Colorful decorative shapes frame the top corners of the image.

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HTTP Archive 💾 @httparchive.org · 16/01/2026

The 2025 Web Almanac by HTTP Archive has been officially released! 🚀 We would like to thank all of our contributors from around the globe who made this extensive report possible! Check out the full report here: almanac.httparchive.org

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Alex Russell @infrequently.org · 28/12/2025

Lots of great stuff in this year's Perf Planet Advent/December series: calendar.perfplanet.com/2025/

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Stoyan Stefanov @stoyan.me · 24/12/2025

Web Performance Calendar day 24 with @programmingart.bsky.social on TTFB. Yes, it's one of those X-mas Eves where we cuddle by the fire, drop everything and immerse into re-learning and re-evaluating what we thought we knew about a concept we use daily calendar.perfplanet.com/2025/ttfb-do...

calendar.perfplanet.com

TTFB doesn't mean what you think it means

Time-To-First-Byte (TTFB) is a popular performance metric, yet there are many problems and nuances with it. Not only does it have several different definitions, it is usually also a "compound" metric,...

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erwinhofman.bsky.social @erwinhofman.bsky.social · 16/12/2025

Look at that 🤩 Safari now supports #LCP and #INP as well! And we can clearly see it in our data 💪 Dates: 🗓️ Nov 3rd: Safari rolled out support in their 26.2 beta release 🗓️ Dec 12th: Safari released it to the public Huge update from the WebKit team, and for #CoreWebVitals in general 👏 1/3

Chart of INP + LCP metrics in Safari over time

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Jen Simmons @jensimmons.bsky.social · 12/12/2025

Safari 26.2 is here with 65 features + 165 bug fixes — including field-sizing, Navigation API, Largest Contentful Paint, command & commandfor, CHIPS opt-in partitioned cookies, scrollend event, random(), WebGPU in WebXR, scrollbar-color, hidden=until-found and much more! webkit.org/blog/17640/w...

webkit.org

WebKit Features for Safari 26.2

Safari 26.2 is a big release.

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Karlijn Löwik @karlijnlowik.bsky.social · 01/12/2025

Might we all get a Chrome Dino in our stockings next Christmas? Apparently the people want it, it got 10k votes😄 (I totally want one) beta.ideas.lego.com/product-idea...

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Bramus @bram.us · 23/11/2025

Yeeeessssss! 🤩

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Ryan Townsend @twnsnd.com · 24/11/2025

This is desperately needed on iOS.

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Alex Russell @infrequently.org · 24/11/2025

Inspired by perfnow.nl, I've dusted off drafts of my network and device situation analysis. Good news/bad news: devices and networks are improving, but pages are swelling. The web is usable for the wealthy, but less so for everyone else. infrequently.org/2025/11/perf...

infrequently.org

The Performance Inequality Gap, 2026 - Infrequently Noted

Embedded in this year's network and device estimates is hopeful news about the trajectory of devices and networks. It has never been easier to deliver pages quickly, but we are not collectively…

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Karlijn Löwik @karlijnlowik.bsky.social · 20/11/2025

Gosh, such a hard life. On the race track of F1 in Zandvoort😄

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Alex Russell @infrequently.org · 18/11/2025

The "i" in "iPhone" stands for "inequality", late 2025 edition:

Worldwide smartphone shipments by year in millions; sources: IDC, Statista, and Counterpoint Research.

At no point in the past decade have iPhones broken the 20% annual sales barrier. iOS is overrepresented in traffic statistics owing to wealth-correlated effects; e.g., faster networks and devices inducing heavier internet use. This does not imply that users on slower devices do not have money to spend, only that they are poorly served by the contemporary web.

Average selling prices in nominal USD for iOS (~$1000) and Android devices (~$300) vs. worldwide smartphone Average Selling Price (~$360).

iPhones aren't real life.

Time series of single-core Geekbench 6 scores for 4 device classes: fastest iPhone, fastest Android, mid-range Android, and low-end device (~$100).

The Performance Inequality Gap is growing, year on year, and the lower tiers are not even on the same trend line, let alone catching up.

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performance.now() conference @perfnow.nl · 04/11/2025

A little aftermovie to whet your appetite. www.youtube.com/watch?v=ByOC...

youtube.com

This was performance.now() 2025

YouTube video by Web Conferences Amsterdam

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performance.now() conference @perfnow.nl · 01/11/2025

performance.now() 2026 will take place on 19th and 20th of November 2026. #perfnow.

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Karlijn Löwik @karlijnlowik.bsky.social · 01/11/2025

We had an amazing time at #perfnow once again! Thanks everyone ♥️ As a final note, old man yells at cloud @cliffcrocker.bsky.social, amazing costume!

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Karlijn Löwik @karlijnlowik.bsky.social · 01/11/2025

Folks from #perfnow, general PSA, there will be issues with ALL the trains to Schiphol Airport, not just Amsterdam Central, expected until 12.15 Article in Dutch: Geen treinverkeer tussen Amsterdam en Schiphol - nos.nl/l/2588749

nos.nl

Geen treinverkeer tussen Amsterdam en Schiphol

Door geplande werkzaamheden reden er dit weekend sowieso al geen treinen tussen Amsterdam Centraal en Schiphol. Maar nu is er ook nog een seinstoring.

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Stuart McMillan @stuart-mcmillan.com · 31/10/2025

One of my favourite pictures from 2023 #perfnow @tunetheweb.com @andydavies.me

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Karlijn Löwik @karlijnlowik.bsky.social · 31/10/2025

Halloween at #perfnow, pirates and vampires. A.k.a sword fight, the sequel. Or... How RUMvision slayed Akamai😇😆 (jk)

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Karlijn Löwik @karlijnlowik.bsky.social · 29/10/2025

We had a great first Real User Meeting (a.k.a RUM RUM) at Google Amsterdam today via our W3C RUM Group today! Great way to kick off #perfnow, with 70 people working on building a RUM+ updates from both Firefox and Chrome🚀😄

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Karlijn Löwik @karlijnlowik.bsky.social · 29/10/2025

Traveling to the train, Dutch style (yes that is @erwinhofman.bsky.social juggling a suitcase on a bike😆)

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Karlijn Löwik @karlijnlowik.bsky.social · 29/10/2025

Child dropped off, voted (it's general election today in the Netherlands) and on our way to #perfnow by train! See many of you in 3 hours at the RUM RUM at Google😀

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Karlijn Löwik @karlijnlowik.bsky.social · 27/10/2025

With everyone in the webperformance sphere in the Netherlands for #perfnow let me send you a sunny picture from Mallorca😀 On our way back to NL tomorrow🇳🇱

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Jen Simmons @jensimmons.bsky.social · 16/10/2025

Largest Contentful Paint (from Core Web Vitals) is now available in Safari Technology Preview. webkit.org/blog/17504/r...

webkit.org

Release Notes for Safari Technology Preview 230

Safari Technology Preview Release 230 is now available for download for macOS Tahoe and macOS Sequoia.

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Karlijn Löwik @karlijnlowik.bsky.social · 16/10/2025

Ha. But also, yes, that is scary 😂

A circular laptop, with someone saying name one reason why you wouldnt buy this laptop, another that says, i'm a Frontend developer and this thing scares me

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Karlijn Löwik @karlijnlowik.bsky.social · 16/10/2025

Live! Fast and Curious webinar with Jordy Scholing (RUMvision) and Wouter Steenmeijer (Elgentos), where they will break websites Core Web Vitals, and fix them again. While messing around and answering important live questions like "Kroket vs Eierbal" Watch here: streamyard.com/watch/iUTmXn...

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Ryan Townsend @twnsnd.com · 15/10/2025

Safari TP 230 includes support for Largest Contentful Paint 🙌 #webperf

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Barry Pollard @tunetheweb.com · 15/10/2025

I spy with my little eye both INP and LCP enabled by default in the latest Safari Tech Preview. What with Firefox landing INP in stable yesterday (on top of LCP that they already supported) this means we'll soon have cross-browser support for these two Core Web Vitals! #interop2025 #CoreWebVitals

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erwinhofman.bsky.social @erwinhofman.bsky.social · 15/10/2025

Nerdy stuff! @mozilla.org #Firefox just enabled support for #INP with v144 🎉 I dived into our raw RUMvision data. And yep, can confirm that it works when using Google's web-vitals #JavaScript library 😍 (updated) article + chart + baseline badges in a blogpost: www.rumvision.com/blog/firefox...

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Firefox Performance @firefoxperformance.bsky.social · 15/10/2025

Firefox 144 now supports INP! 🦊 We just shipped interactionId, the piece that makes Interaction to Next Paint work. It helps browsers connect events from the same interaction and measure how responsive pages really feel. More here: blog.mozilla.org/performance/...

blog.mozilla.org

Firefox 144 ships interactionId for INP – Mozilla Performance

TL;DR Firefox 144 ships PerformanceEventTiming.interactionId, which lets browsers and tools group events that belong to the same user interaction. This property is used to calculate Interaction to Nex...

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Karlijn Löwik @karlijnlowik.bsky.social · 11/10/2025

Ha! Hema now sells bitterballen stuffies, that is hilarious. And stroopwafel, rookworst and tompouce 😀🇳🇱 Love them.

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Karlijn Löwik @karlijnlowik.bsky.social · 08/10/2025

Guess who was feeling creative and made a prize for @erwinhofman.bsky.social upcoming SEO Benelux quiz 😉

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Barry Pollard @tunetheweb.com · 07/10/2025

I mentioned before that we’re switching Lighthouse Performance audits to the new and improved Insights. The same Insights that you can see in DevTools Performance panel traces. That’s happening in Lighthouse 13 due to be released very soon. Maybe even this week!

developer.chrome.com

Performance | Chrome for Developers

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Karlijn Löwik @karlijnlowik.bsky.social · 07/10/2025

So, apparently I emoji wink in talks now😉 Both eyes, it's only fair😂

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Karlijn Löwik @karlijnlowik.bsky.social · 03/10/2025

Had a great time as one of the speakers at #fronteers tonight. With @erwinhofman.bsky.social talking about web performance😀

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Karlijn Löwik @karlijnlowik.bsky.social · 29/09/2025

Ok, this is funny (saw it on Reddit, apparently it's in London)

Stoplight in London, with sign which colour blind people can't read. For those who can it says: attention cyclist. If you read this you see the difference between red and green

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Karlijn Löwik @karlijnlowik.bsky.social · 24/09/2025

"The extremely pathetic expression on his face " TIL that the Italian explain signs really can be quite rude😅

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performance.now() conference @perfnow.nl · 24/09/2025

performance.now() is coming! LCP and INP measure loading and responsiveness of entire pages – but same-document soft navigations were much harder to measure. Until now! @mmocny.com will explain how new Performance APIs make this possible. perfnow.nl/speakers.html#michal

perfnow.nl

performance.now(); 30th and 31st of October, Amsterdam

On 30th and 31st of October, 2025, the sixth edition of performance.now() will take place in Amsterdam—a single track conference, covering today’s most important web performance insights.

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Karlijn Löwik @karlijnlowik.bsky.social · 24/09/2025

Pretty ancient stuff and amazing food. I love Rome 🇮🇹💗

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Karlijn Löwik @karlijnlowik.bsky.social · 23/09/2025

On our way to Rome for Meet Magento Italy with @erwinhofman.bsky.social 🇮🇹🍕😄

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Karlijn Löwik @karlijnlowik.bsky.social · 18/09/2025

Don't want LinkedIN to automatically train its AI on your data, switch it off here: www.linkedin.com/mypreference... Not sure about the rest of the world, but if you don't switch it off it will start collecting in November for the Netherlands/ Dutch members.

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Barry Pollard @tunetheweb.com · 18/09/2025

Great post from @erwinhofman.bsky.social on webperf Interop proposals: www.rumvision.com/blog/interop... Upvote your favourite ones to let us know which are important to you!

rumvision.com

Interop 2026: Key APIs for sitespeed & RUM

Real User Monitoring

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Karlijn Löwik @karlijnlowik.bsky.social · 17/09/2025

@fronteers.bsky.social conferce is back! Really excited that @erwinhofman.bsky.social and I get to join an amazing line-up and at a really awesome (cinema) venue this event. Who's joining us?

Upcoming event: fronteers dark mode, talk by Erwin Hofman and Karlijn lowik about Webperformance

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