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karlijnlowik.bsky.social
CEO & Co-founder @RUMvision | Simplifying web performance | Women in tech advocate | Toddler mom | International speaker | Lover of memes | Co-chair RUM W3C | Board member Mage-OS NL Feels like this bio is getting really long😅
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Look how amazing, I got suprise cake and fireworks for my birthday yesterday, at the pre-party of Hyvä Developers Paradise in Gran Canaria. One of my best birthday ever🧡

Greetings from Gran Canaria, where we will be giving a workshop to improve webperformance, while soaking up the 25 degrees celcius sunshine 😎☀️ There should be more winter events in the sunshine. @tkadlec.bsky.social want to brainstorm on that again with me?

New in Chrome DevTools: Accurately emulate CPU performance of a low/mid tier phone with Automatic CPU throttling calibration! 📲 This feature calculates slow-downs for your specific device. Wanted this for years! We just shipped it.

As a Dutch person I resent this title BBC😆. I do not see it being any worse than Nutella, jam, marshmallow fluff (talk about too sweet, yuk) or sweetened cereal. Especially the version with pure chocolate, with real butter, is delicious 🥰 www.bbc.co.uk/travel/artic...

One of our favorite talks from FOSDEM 2025! 😍 Explore "How Browsers REALLY Load Web Pages" as Robin Marx reveals the intricate dance of performance prioritization in web content delivery. 🌠 Watch the talk 👇 fosdem.org/2025/schedu...

Am looking for a new haircut on Pinterest, when did all images their become AI and ads from Temu? This is ridiculous, it wasn't like this 6 months ago, right?

Web performance meme of the day😄 Fun fact, while everyone and their mother thinks this is the nr1 pagespeed trick, it actually only affecta 10% of all LCP. The others? Read them here: web.dev/blog/common-...

Happy Valentines Day♥️ Some cringe performance love wisdom😄 "True love is like perfect Core Web Vitals - smooth, responsive, and worth optimizing for" "The only acceptable CLS? When your heart shifts for someone special" " Love is like page load time - the best connections are instant"

Interop 2025 launched today! Some really exciting features set to become part of Baseline this year.

Just walked (instead of cycled) the 3 year old to daycare, because it was snowing so hard here in Groningen, Netherlands. We sang: "we are snowmen" all the way. We were not wrong ⛄😉

What's more magical then snow? Watching your little girl love it❄️⛄ (but not on her nose, that was too cold😉)

Well, maybe it's not 50-60% of global cheese intake, but Gouda is definitely 50-60% of MY cheese intake 😂 www.pcmag.com/news/google-...

Very excited to see how Baseline is starting to make the web ever-so-easier to build for!

Coolest thing ever🤩, our Baseline integration into RUMvision got featured as a use case web.dev/case-studies... Not something I could have predicted when we started our startup 3 years ago, and was looking through web.dev as a source of info, which makes this even cooler! 🥳

Does anyone know good time tracking software for projects with a retainer? For instance, clients has retainer for 8 hours, I (and even better, them) get a notification that it's almost finished?

We’ve just released a Chrome extension for the Firefox Profiler! 🚀 See how it can enhance your performance workflow in our latest blog post! blog.mozilla.org/performance/...

The video from my closing keynote to #perfnow is out! I talked about how to approach web performance problems--kind of a beginner's guide to becoming an expert. I hope you enjoy!

For everyone who ever needs to explain percentiles in Core Web Vitals 😆

There is nothing quite as awkward as having to make a promo video of yourself 🙈 I was finally somewhat happy, and misspoke the date.. so, here I go again😆

The next #perfnow video has been released: @karlijnlowik.bsky.social and @erwinhofman.bsky.social with INP Case Studies youtu.be/whgZ8PTh82M

Cool! @erwinhofman.bsky.social and mine talk at @perfnow.bsky.social is available now! Check our talk about interactivity/INP that is interactive! We bring you : use-cases, statistics, solutions and fights over the remote😆(what, we're married, that is expected😉) youtu.be/whgZ8PTh82M?...

attr() is getting an upgrade! Starting in Chrome 133 (stable rollout happening this month), you'll be able to access attributes in CSS as typed values beyond strings.

📣 I'm so excited to announce a new meetup I started! PerformanceObserver is a virtual meetup for the frontend web performance community! The first event will be announced shortly. You can join the newsletter to make sure you don't miss an event. #webperf performanceobserver.dev

I hate having the flu. It's miserable not being able to do anything and feeling miserable. I did some very light cleaning up after laying in bed for 4 days. 10 minutes max. I'm floored😢.

Are you: using a RUM (real user monitoring) work/ own one or are you just really passionate about it? The RUM W3C group has its first meeting of the year this Friday: January 17th at 10am EST Not a member yet? Sign up here for free www.w3.org/community/ru... See you then?😀

I've had a few people reach out to me recently asking for help with LCP issues where they are looking at optimising the wrong thing. They were asking what frontend improvements they could make when that was not the problem. Yup it's time for another long thread to try to explain... 🧵 1/17

Web performance calendar day 24 with @erwinhofman.bsky.social on the web performance effect of CSS @imports calendar.perfplanet.com/2024/the-cur...

It's the most hated time of the year, finding all the missing receipts for my accountant 🤣 50 down, 95 to go..

Great write up on why we need a single CWV score to help offset the misunderstandings between Lighthouse and real user performance metrics by @karlijnlowik.bsky.social #webperf