It's our favourite thing when people tell us that they had to sit with a choice in Fallen London for five full minutes. That's how we know you're suffering the correct amount.

Speed still matters. "for every 100 milliseconds slower a store loads, conversion tends to be about 3.5% lower. (...) For every 32 milliseconds slower a store responds to interactions, conversion tends to drop by about 1.5%." www.shopify.com/enterprise/b...

This's a ride of a thread

I *do* love fruit news & listening in on trends for industries I'm not directly in

What an excellent article from our otter friend, Dr. Heidi Island - a professor of biological psychology and behavioral ecology at Pacific University and a member of the International Union for Conservation of Nature’s Otter Specialist Group. www.popsci.com/environment/... #seaotters #riverotters

I wrote about why I quit my job, and how weird and tiring tech feels these days.

Chuck's Hop Shop in #seattle, 16th anniversary. Cheers to making it this far. Thai Lay's Max, extra ridged ghost pepper extra chili. Mild enough on chip 1 you wonder what the fuss is 1, hot enough halfway through the bag you understand.

I am thrilled to announce that Dreams on a Pillow has wrapped up pre-production and we are about to start full production. We can’t do it without your support. We are starting our second round of crowdfunding, to support us you can find out more here www.launchgood.com/1948

I say it every year - if you're even the least bit interested or involved in web performance, this is THE place to be every year. It's the one trip I prioritize my travel budget for. The talks are awesome, but the hallway track is unbeatable. The concentration of experts in one place is insane.

#OnThisDay in 1962, Belgian waffles made their American debut at the Seattle World's Fair. historylink.org/File/10092

Conference organising in 2026 quirksmode.org/quirksblog/a...

Bao is growing up fast! At four months old, our Asian small-clawed otter pup is getting more confident every day. He's splashing, exploring, and discovering new habitats alongside his loving parents.

Would recommend, this was a gripping read

p75 and p90 JavaScript bytes on the web have exploded since May, 2025—easily the largest 10 month period based on HTTP Archive data since 2023. The long-tail is getting worse, very quickly. Gemini, what happened in May 2025?

🚀 Real User Monitoring from @calibreapp.com has arrived Session-based Core Web Vitals monitoring. See actual DOM elements dragging your site down. No cookies, no bloat, predictable pricing. Let's go! calibreapp.com/blog/real-user-monitoring

✨ Core Web Vitals Summit: The Videos ✨ I'll be sharing the recorded sessions from the Summit stream, and some brief commentary on some takeaways and significance. All are welcome to join the conversation! 📆 Monday March 23rd ⏰ 1pm EST, 10am PST 🔗 www.youtube.com/live/LXYcknO...

Eid Mubarak. Here is my daughter fending off a Beirut cat who belongs to the cafe but wanders in and out depending on the menu. If you celebrate, may your meal be as tempting as the makdous bi labneh was to this kitty.

Coming up: April 16th — Paul Calvano presents "Introduction to the HTTP Archive": www.meetup.com/web-performa... April 30th — Meet4SPEED hands-on session: www.meetup.com/web-performa...

@newyorker.com hit the nail on the head with this one 😂 #Seaotters are highly intelligent marine mammals that use tools, like a rock 🪨, to crack open the hard-shelled invertebrates they love to eat, such as crabs 🦀. #otters #cartoon #newyorkermagazine #seaotter #newyorker

Both showers and public transit rides have 3x multipliers to Thinking Time. You'd think stationary bikes would be too because they're both moving and mindless but actually they're 0.5x at best. Long flights have 10x to Thinking Time but only if you're in the sweet spot of tired but not TOO tired

The performance team I lead at Automattic is hiring - automattic.com/work-with-us... #webperf #php #jobs #wordpress #woocommerce

Breaking News: Baby Bao found another stick! The 3-month-old otter pup was really proud to show it off and even share it with his mom, Pintar. 💙

Interested in the @httparchive.org and not sure where to start? During the @performanceobserver.dev meetup tomorrow (12:30pm ET), I'm going to be providing an overview of the HTTP Archive and demonstrate how to start querying it! performanceobserver.dev/events/episo...

Bao, meaning “treasure” in Vietnamese, represents more than a milestone for our zoo. His birth was recommended by the Association of Zoos & Aquariums Species Survival Plan® (SSP), a science-based program supporting the long-term survival of this highly vulnerable species. 2/2

Two things growing otter pup, Bao, loves: eating seafood and playing with sticks! 💙 As first-time parents, Pintar and Sebastian have done an exceptional job raising Bao behind the scenes. Now three months old, he’s ready to make his public debut this weekend. 1/2

How it started: early construction taking shape. How it’s going: a fully connected 2 Line. Years of planning, precision, and teamwork are leading to one historic connection, opening March 28. See more photos: https://www.soundtransit.org/blog/platform/then-now-crosslake-connection-journey-photos

In our rush to align page speed with SEO and business metrics, have we in the #webperf community lost our way? In this post, based on the keynote I gave at #PerfNow a few months ago, I explore how it's not too late to bridge the gap between pragmatism and user delight. www.speedcurve.com/blog/fast/

Seattle gonna Seattle 😅

How do you measure when a component is “ready”? ⏱️ LCP is too global; Element Timing is too specific. 🛠️ I’ve been working with Bloomberg on a new #webperf API: Container Timing. Think of it as “LCP for a web component”, providing aggregated paint timing for a subtree.

A shocking 8.5% of sites that use CDNs deliver some static content directly to end users via cloud storage! Many are not compressing or caching this content either. This comes at a significant performance cost. Details, examples and @httparchive.org stats here - paulcalvano.com/2026-02-09-s...

Our sea otters are celebrating the Seattle Seahawks heading to the Super Bowl with fishy football treats and plenty of otter enthusiasm. 💙🦦💚

Bennie & Clovis Martin, inventors of the po' boy sandwich, to striking workers: "We are with you till h--l freezes, and when it does, we will furnish blankets to keep you warm." Let's bring this energy to 2026: buttondown.com/theswordandt...

@nywebperf.com is looking for speakers for April! Have you made a website faster? Can you get yourself to NYC? Let me know!

"We would have lost so much if we'd driven him away" is the justification. But we lost all those girls. We lost the women they would have become. We lost the work they would have done. Why was his future work so much more valuable than theirs?

New blog post about an experiment in measuring how rendering times are affected by the size of SVGs www.phpied.com/measuring-sv...

“pandoc for the people”, the pandoc wasm web-app, is now available at https://pandoc.org/app/ It allows to run any kind of document conversion that pandoc supports in the browser. The documents never leave the computer, thus ensuring *full privacy*. Conversions to pdf are done via Typst […]

cat

Otter #433 🦦

Here's your friendly reminder that CSS selectors are global and evaluated RTL, so if you have selectors that are very broad like `.container > div` you might be impacting performance in a measurable way 🙈 Before and after profile of server switching after some selector optimizations in @discord.com

this is truly a perfect distillation of the AI industry's ever-more-monumental public relations problem

Showing cross-racial solidarity is a potential death sentence. There are few things white supremacists hate more.

We could talk about whether we got the "good cyberpunk" but what's important I think is a good 50 years of film and comics were trying really, really hard to make you think about this exact sort of image, and to internalize that if you saw this sort of image you should have an intense reaction to it

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

🦦🌊 #telekitneticart #formline #indigenousart Another otter formline commission for loial otter via TG!! :>

I've been running an indie games studio for 15 years now, and it felt like a good time to boil down what I've learned into 4 pieces of advice: www.pentadact.com/2026-01-08-1... I hope it's of use, not least because goddamn I forgot how long blog posts take to write.

ICE agent kills woman, DHS tells obvious, insane lies about it: defector.com/ice-agent-ki...

“It’s about being full human beings and not just means to an end. I want to live in a city that honors what you’re doing when you’re not making money: time spent on the playground with a kid or visiting a sick friend…we need bread, but we need roses too.” -Seattle Mayor Katie Wilson

The viewers are encouraged to take pieces of candy away, symbolically performing a sacrament of partaking of the body, and symbolically watching his partner waste away to nothing. It is such a poignant and powerful piece

My contribution to this years Web Performance Calendar is all about Third Parties and Single Points of Failure (SPOF). Based on @httparchive.org data I found that 67% of websites have at least 1 render blocking third party - and quite a few of them are SPOF risks!