ppk 🇪🇺

Rudy Limeback?! Give him my regards!

Screenshot of the performance.now() conference schedule. Follow the link in the main text to read it.

Schedule schedule on the wall, who has the best line-up of them all?

perfnow.nl/schedule.html

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.

OK, we're down to our last tickets. There's still room for people to join performance.now() on 30th and 31st of October (in two weeks and a bit), but it's time to decide.

https://perfnow.nl
Last tickets at https://perfnow-2025.eventstack.shop

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.

OK, we're down to our last tickets. There's still room for people to join performance.now() on 30th and 31st of October (in two weeks and a bit), but it's time to decide.

perfnow.nl
Last tickets at perfnow-2025.eventstack.shop

Left picture: the pro-Palestina demonstration last weekend.
Right picture: the anti-immigration demonstration this weekend.

Both on the same place about 1km from my house.

Arrests last weekend: 0.
Arrests this weekend: dozens.

Anyone who works on browsers, or might know of where there might be information on this:

I'm pretty sure that a few years ago I heard that browsers (maybe it was a specific one?) were optimizing custom props declared on the :root, and which didn't change values.

Was this a thing? Is it still true?

In the tram I sat opposite two girls, who did some web design and were clearly about to become a couple. It was very sweet

… and then one girl tried to impress the other by naming Adobe products…

I hope someone can explain the importance of Adobe products in modern lesbianist lifestyles.

The leader had been in the hands of the Spanish Inquisition for a short while, then became a slave trader in the Dutch West-Indian colonies, then took his responsibility when war came.

Today I went to the university library for the first time in close to 25 years in order to pick up my library card.

They couldn’t help me because the printer broke down. And tomorrow they’re closed due to the official opening.

It’s like coming home, except with more bureaucracy.

... and if I were to ask you "Who would you like to see speak at CSS Day 2026", what would your answer be?

Name as many names as you like.
I'd like to hear about people who aren't that well known yet.

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.

performance.now() is coming!

Every byte shipped carries a carbon cost. @inesakrap.bsky.social will present insights from the Sustainable Web Guidelines that result in a site that is not only fast, but also green and responsible.

perfnow.nl/speakers.html#ines

LinkedIn Login, Sign in | LinkedIn Login to LinkedIn to keep in touch with people you know, share ideas, and build your career.

Oh, good tip.

Go here: https://www.linkedin.com/mypreferences/d/settings/data-for-ai-improvement

and turn off "Data for Generative AI Improvement" on LinkedIn.

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.

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! Michal Mocny will explain how new Performance APIs make this possible.

perfnow.nl/speakers.html#michal

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.

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

The ecclesiastical history of Socrates, surnamed Scholasticus, or the Advocate : comprising a history of the church, in seven books, from the accession of Constantine, A.D. 305, to the 38th year of Theodosius II., including a period of 140 years : Socrates, Scholasticus, approximately 379-approximately 440 : Free Download, Borrow, and Streaming : Internet Archive Book digitized by Google from the library of the New York Public Library and uploaded to the Internet Archive by user tpb.

Today I found a new one. A pious story about the advantages of converting to Christianity, and I'm not sure if I place the story on equal height with the other sources, but it's still interesting.

https://archive.org/details/ecclesiasticalh02valogoog/page/368/mode/2up

Thanks for the pointers. I'm going to take this very slowly. (I'm a bit ill; I saw this as a sort of puzzle).

Also, is this behaviour described in the grid spec? So far I found nothing, but I haven't looked at the spec in ages.

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.

and will explore ideas on how these tools can be integrated into your development process and CI/CD pipelines for automated performance testing.

https://perfnow.nl/speakers.html#umar

Umar Hansa will teach you about modern automated workflows using coding agents that work with the DevTools protocol, browser automation, and Model Context Protocol,

And when you throw a track with width: max-content in the mix it gets even more complicated.

Has anything been written about margins and grids?

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.

performance.now() is coming!

As tooling improves, is performance testing becoming any easier? @csswizardry.com, who spends every day auditing client projects,, thinks confusion has increased. Let's ensure that every test we run has a purpose and gives us useful data.

perfnow.nl/speakers.htm...

Today our congregation of faithful will sing the psalm

What An Incredible Piece Of Shit Gimp Is

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.

performance.now() is coming!

@tammyeverts.com asks a seemingly-simple question: How Fast Is Fast Enough? She'll touch on questions — ranging from neuroscience to business metrics — to get you thinking about how you create, measure, and report your performance goals.

perfnow.nl/speakers.htm...

perfnow.nl, make the browser window narrow and look at the image strip. The images should be centered in their divs, but aren't in FF 14.2 and Safari 18.3. Chrome 139 works fine. All on Mac.

& img {
width: 100%;
min-width: 100px;
display: block;
justify-self: center;

}

Hey wait no. I'd already given the images a display: block ...

Ah!

Images was exactly what I used it for.

Is that restriction standards-compliant?

justify-self on arbitrary elements is Chrome only for now, correct?

Re-aligning my business goals ... stand by ...

Yes, you were the main exception.

'fraid so. I don't make the rules.

Not what I meant.

Post-Covid but pre-Trump, how many US conferences invited int'l speakers at all? Not many.