My article for Performance Calendar is live, looking at tips to help focus when doing performance traces.

Web Performance Calendar day 27 with @nucliweb.net on using Chrome DevTools for fun and profit: inspect heavy files in Network panel, monitor Core Web Vitals, record performance traces, validate optimizations, and more. calendar.perfplanet.com/2025/chrome-...

Web Performance Calendar day 26 with Sébastien Mischler on HTML streaming/flushing and how this old trick (featured in the first edition of the calendar) applies to today's CSR world. Show content now, not after JS finishes thinking. Fast pages, happy users. calendar.perfplanet.com/2025/revisit...

Can't wait for the loosened up, non-perfect, but quickly shipped AI-enhanced updates to hit my banking and insurance services next year. Im sure there will be no issues there at all.

Web Performance Calendar day 21 with Conor McCarthy and lessons learned from web perf client site reviews calendar.perfplanet.com/2025/insight...

Web Performance Calendar day 13 with Yoav Weiss (@yoav.ws) showing us a clever and creative way to ship *only* critical/necessary CSS for each page type (home, search, etc) while also avoiding duplicate code in the CSS bundles. calendar.perfplanet.com/2025/how-to-...

With talks from an international line-up: • Bramus Van Damme (Google) • Léonie Watson (Tetra Logical) • Fiona Safari (Tesco) • Jake Archibald (Firefox) • Alistair Shepherd (Series Eight) • Cassie Evans (GSAP/Webflow) • Phil Hawksworth (Deno) ti.to/hey-presents...

🎉 And we're live! 🎉 We just launched CSS Wrapped 2025: our annual recap of all things CSS & web UI that landed in Chrome over the course of the year. 🚀 This is a big one! We highlighted 22 new features to help you build better on the web. Check out: chrome.dev/css-wrapped-2025

Who has made this 🤣

That ghost of yotei main story done 😭 after 62 hours.

Heavy tooltip libraries about to get ripped out:

Hey folks, tomorrow myself and a bunch of other web perf experts are going to be talking about all things Core Web Vitals! Come join us live Dec 3 at 11am Eastern! #webperf cc @henrihelvetica.bsky.social www.youtube.com/live/dQqqOYA...

bsky.app/profile/perf... exists now in the world

Just cancel your Netflix subscription and stop buying avocados. You'll be fine

*cough* we have known this for years *cough*

So someone asked him for an example of racism that isn't hurtful or insulting, right?

Still loving Ghost of Yotei.

Out-of-order HTML patching, another proposal from TPAC, lets HTML be presented non-linearly, and a single file can update multiple parts of the page. Would this feature be useful to you?

If on LinkedIn and interested in how algorithms are suppressing female content on their platform, check this post out

So cloudflare is down and the down detector websites uses cloud flare recaptu to check I am human so I can't access the down detector on my phone.

New on the blog: I learned that Node.js includes a native method for marking other methods as deprecated. 🎉 www.stefanjudis.com/today-i-lear...

All Day Hey is a great conference in Leeds - let’s sell it out one last time!

We are in a black mirror episode aren't we.

Instant purchase, I loved attending all day hey and it smaller talk events when living in Leeds.

I once managed to get copilot to say Monday didn't end in a Y because I asked it to write a unit test to test which days of the week actually end in Y. It couldn't find a failing path so it decided to confidently be wrong.

Trevor Philips tries to get Zack Polanski to trip up on the issue of trans Polanski responds with a slam dunk, a home run, a touchdown - whatever your sports metaphor is 👏

Storybook 10 is here! ✂️ ESM-only (the only breaking change!) 🧩 Module automocking for easier testing 🏭 Typesafe CSF factories Preview for React 💫 UI editing and sharing optimizations 🏷️ Tag filtering exclusion for sidebar management 🔀 Svelte async component support

We often hear that folks want "wrap detection" in CSS (i.e. when a flex item shifts into a position where it wraps over to the next line) What is a real-world example of a use-case you would need this for?

Ghost of Yotei is a stunning game and I absolutely love the wolf dens missions.

Fellow #perfnow fellows, a reminder that PerfPlanet calendar is coming this December for another edition. And it needs YOU. Please ask if you have any contribution ideas or concerns calendar.perfplanet.com/contribute/

I wonder if they are using the Brexit countdown clock until they can remove her. Interesting that skynews is reporting this as skynews reporter beth always thought hacking was funny.

“What happens when you want to center a div in Chrome?” — @michael-hladky.bsky.social at #perfnow This would make a great interview question that would give a variety of different answers. #webperf

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

Farage: epic grifter

JavaScript top-level await is no longer considered 'baseline' due to a pretty big Safari bug caniuse.com/mdn-javascri... The module graph fails in cases where two modules import a third at the same time. Demo: random-stuff.jakearchibald.com/bug-repros/t... It's best to avoid the feature for now 😔

Online on a weekend? You can grab access to my web components course for $25 today and tomorrow. Big ol’ discount. Use the code OCT25-26. (And as usual, if you need further accommodation, just use the email form and we’ll work it out.) scottjehl.com/learn/webcom...

Hey, did I miss you in my unscientific perusal of my feed just now for folks who are active on Bluesky and post their own content (not just repost others)?

Breaking: The Supreme Court is now officially considering taking up a case overturning same-sex marriage. This is the first time in history the court has considered rolling back this right.

Okay that's enough of this timeline today.

I don't want AI, I just want to open an application or file I need every now and again.

Daisy Cooper, "Will the Prime Minister Keir Starmer ask our security services to assess the threat that Elon Musk poses to our democracy"

Straight to the all inclusive bar after checking in.

So turns out React throws hydration error on <template> html element existing in the initial html🤦‍♂️ must be because it a document fragment, but they goes that idea to build some sharable web components.

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

"Time to Brand Identity" iankduffy.com/articles/tim... It's tempting to be drawn into thinking that the Largest Element is the most important one on the page. @duffeh.bsky.social covers how to measure other perhaps equally important visual elements with ElementTiming (one of my favourite APIs)

Huh, TIL there’s an <output> element, and it can be used to display the result of user inputs in a screen-reader-friendly way! I can think of a bunch of places I should be using this 😄 denodell.com/blog/html-be...

Seeing the clips of @zackpolanski.bsky.social absolutely rinsing Zia Yusuf has fixed my mental health in a way nothing else could