This is a phenomenal web demo. Enabled by window.getScreenDetails() which provides basic live info (size, position etc) from all screens on the device.

✨ The Hallway Track w/ Tanner Hodges ✨ Sr engineer and Web Performance podcast host, Tanner was my guest at #PerfNow. We discussed his podcast 'Catching Up With Web Performance' + tooling he's working on + more. Enjoy. #webperf #perfmatters 🎥: youtu.be/pg-TvAKL9tk?si…

Web Performance "advent" calendar is happening again this year for its 14 year in a row! Articles needed! What would you like to share with the community? phpied.com/perfplanet-cal…

Introducing new web platform features is a long and tedious process. One of the reasons for that is that deprecating old ones is longer, often far more tedious, and not always possible.

DevTools update! We've added whiskers to the Interactions lane of a Performance trace:

🪩 Web Performance calendar day 4 ☕️ Let's cuddle by the fire with a holiday beverage of choice and let Ethan Gardner guide us through warming up the cache for some delicious FCP and TTFB wins 🔗 calendar.perfplanet.com/2023/informed-…

🪩 Web Performance calendar day 9 👋 when Tanner Hodges invites us to join community.perfplanet.com in addition to the webperf Slack 🔗 calendar.perfplanet.com/2023/perfplane…

Perfplanet calendar article pipeline is almost dry. If you thought about writing an article, now's the time. If you didn't plan, now's a great time to think about what you'd like to share with fellow #webperf enthusiasts. Details: calendar.perfplanet.com/contribute and I'm here for any...

What I consider to be my ✨best talk ever✨ is now online! "Resource Loading at the Cutting Edge" from performance.now() conference dives deep into #HTTP3 resource prioritization, and how browsers, servers and tools support this critical feature (spoilers: not well! 👇) youtube.com/watch?v=MV034V…

My post 'The Golden Rule of Web Performance and Different Performance Engineering Specializations' in Web Performance Calendar calendar.perfplanet.com/2023/golden-ru… Stoyan Stefanov 🪩 is doing that every December since 2009 - it is a treasury of #Performance info (mostly Web - but not only).

🎇 And just like that, PerfPlanet calendar is a wrap with the "advent" part (24 articles in December). But rarely do we stop at 24. At this time the pipeline is empty, however I know some folks are writing and/or promised to write. I'll see when they deliver and either keep ...

So happy to be part of this year's Performance calendar 🥳🥳. This subject is close to me as currently I'm digging through user metrics and bridging the server-client gap 😀

I can not stress enough how tough it is to build a web app that works well across browsers, mobile devices, and input methods while staying accessible and performant. Hug your frontend developer.

Not sure how to get started with web performance? Check out our new blog homepage: debugbear.com/blog

What math formulas describe the load time of a web page? #webperf

Poor webperf rarely comes in isolation. it’s often accompanied by UI bugs, security issues, awkward auth flows, neglected a11y…. That’s because perf is an aspect of software quality, not a “feature”. Investing in webperf is one of the indicators of software quality.

INP replaces FID as the responsiveness metric in #CoreWebVitals on March 12. Let's revisit important INP research, starting with @cliffcrocker 's investigation into whether INP correlates to user behaviour. (TLDR: it does, but with caveats.) speedcurve.com/blog/INP-user-… #ux #webperf

It's been a while. tannerhodges.com/blog/looking-b…

A few random notes from claude coding quite a bit last few weeks. Coding workflow. Given the latest lift in LLM coding capability, like many others I rapidly went from about 80% manual+autocomplete coding and 20% agents in November to 80% agent coding and 20% edits+touchups in

Recommended reading. But out of the old will come something new. The only thing that needs fixing is the dependency on big labs. I'm not sure it can be, unless they become true commodities. nolanlawson.com/2026/02/07/we-…