iiinova — where your digital self keeps evolving

Ryan Townsend @twnsnd.com · 29/09/2026

It might look weird but it's correct (I had the same thought!). Because of the way we're bucketing by the overall LCP first, those in the 'Slow' bucket spend more of their time elsewhere.

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Jake Archibald @jakearchibald.com · 23/09/2026

I've proposed "progressive image rendering" as a focus area for Interop 2027, so we can get progressive JPEG XL support in Safari, and progressive AVIF support in both Safari and Firefox. github.com/web-platform...

github.com

Progressive image rendering for JPEG XL and AVIF · Issue #1459 · web-platform-tests/interop

Description When we looked into JPEG XL, I asked developers why they were interested in the format, and the most common answer was "progressive rendering". This is now working in Firefox and Chrome...

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Ryan Townsend @twnsnd.com · 17/09/2026

Thanks for this, it will be very useful!

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Viewport @viewportconf.org · 03/09/2026

We just finished the beta of our website. Look out for updates on Viewport soon! You can sign up to our mailing list to be kept in the loop. viewportconf.org

viewportconf.org

Viewport 2027 — An independent conference about the web

An independent conference about the web, the people who build it, and the people we build it for. Liverpool, May 2027.

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Alex Russell @infrequently.org · 14/09/2026

Jeremy's whole post is worth a read, and I would underline + bold the last point: the web is the superior choice for privacy and security, and it's anti-web *and anti-user* to be preferencing native app install affordances: adactio.com/journal/22757

adactio.com

Stalling installing

Trying to get past Webkit’s blockage at the W3C.

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Barry Pollard @tunetheweb.com · 15/09/2026

We just launched experimental ad metrics in the Chrome User Experience Report (CrUX): - Ad Count - Ad Density - Ad Weight: Network - Ad Weight: CPU These metrics are a set of ad-related measurements that provide transparency into sites' ad experiences. developer.chrome.com/blog/crux-ad... 1/8 🧵

developer.chrome.com

New ad metrics in Chrome User Experience Report | Blog | Chrome for Developers

Learn about the new ad metrics now available in the Chrome User Experience Report (CrUX)

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Ryan Townsend @twnsnd.com · 12/09/2026

I can't attend in person, but NY folk should! Sufian is a talented engineer who I'm lucky to call one of my colleagues.

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Patrick Brosset @patrickbrosset.com · 11/09/2026

Interop 2027 prep is now. Want to help? 1. Go to developer-signals.rviscomi.workers.dev 2. Sign-in using GitHub 3. Find features you need 4. Click the comment icon, add your use case 5. Submit There aren't many ways to tell browsers what you need and why you need them. That's a very effective one.

The website, showing a list of web features and a search tool. The title says Shape what browsers build next. The github sign-in button is highlighted as step 1. The speech bubble icon on one of the features is highlighted as step 2.

The website, a feature has been selected, and the Provide developer signal dialog is displayed. The use case text input field is highlighted as step 3. The workaround text input field is highlighted as optional. And the submit button is highlighted as step 4.

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Ryan Townsend @twnsnd.com · 10/09/2026

Wish I could have been there! All the best for a smooth run, you too @bugdan.dev!

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erwinhofman.bsky.social @erwinhofman.bsky.social · 05/09/2026

So, submit your own proposal or give a 👍 to already listed/proposed features you'd like to see supported across browsers. Starting with LoAF when unsure where to start upvoting 😜 github.com/web-platform... RUM tools, developers and ultimately site visitors will all benefit! 3/3

github.com

Long Animation Frames API · Issue #1372 · web-platform-tests/interop

Description The Long Animation Frames API (aka LoAF) defines a mechanism for pages to observe “long animation frames” (animation or rendering updates delayed beyond ~50 ms) that block rendering or ...

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Ryan Townsend @twnsnd.com · 04/09/2026

I see you went to “Earnest?”… I ended up playing Lady Bracknell 🤣 serves me right for sitting on the front row!

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Ryan Townsend @twnsnd.com · 04/09/2026

Wish I could have stuck around to join you two after the Fringe this weekend!

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Ryan Townsend @twnsnd.com · 04/09/2026

Reminder: you can use our RUM service to measure your #webperf completely for free, even if you don’t proxy traffic through our CDN or even use our DNS!

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Ryan Townsend @twnsnd.com · 03/09/2026

Can 2027 be the year we finally get all the Core Web Vitals in all browsers? 🙏 Work your magic folks: github.com/web-platform... #webperf

Bernie Sanders meme captioned “I am one again asking for CLS”

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Ryan Townsend @twnsnd.com · 31/08/2026

I’ve had an issue with _their_ cache (before the build starts) taking an exponentially long time, so it racks up costs/time. Don’t know if you’re hitting the same bit afaik there’s been no effort to fix it. I’ve had to hack around it by running periodic builds with the cache reset flag.

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James @43081j.com · 04/08/2026

Using the @e18e.dev MCP server has been pretty fun. "Check the dependencies for any redundant ones", and it does a pretty good job! We can improve it but it's a great start 🎉 Big thanks to @paolo.ricciuti.me being the resident ai guy 😄

mcp.e18e.dev

e18e MCP server

The official e18e MCP server, advising agents on modern and performant best practices.

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Stefan Judis @stefanjudis.com · 17/07/2026

If you're dealing with SVG icons you probably know the pain of overwriting colors. There's a new spec in the making that allows controlling CSS variables from "the outside". And it's shipping in Firefox already! drafts.csswg.org...

Code snippet: img { link-parameters: param(--color, green); } and .foo { background-image: url("image.svg", param(--color, green)); }

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Ryan Townsend @twnsnd.com · 25/07/2026

Amazing resource for anyone trying to understand performance profiles 👏🏻

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Alex Russell @infrequently.org · 15/07/2026

If you work in frontend or on browsers, @lea.verou.me's post on polyfills is worth your time: lea.verou.me/blog/2026/po... /via @gregwhitworth.bsky.social

lea.verou.me

In defense of polyfills • Lea Verou

A highly influential spec editor expressed the opinion that polyfilling is harmful. I beg to differ.

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Ryan Townsend @twnsnd.com · 09/07/2026

(appreciate I’m a little late to the game but this was only just shared with me!)

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Ryan Townsend @twnsnd.com · 09/07/2026

If you’re curious how we offer services like this for free: blog.cloudflare.com/cloudflares-...

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Ryan Townsend @twnsnd.com · 09/07/2026

Cloudflare Real User Monitoring (aka Web Analytics) is the # analytics tool of 2025—with installs on 1.5% of all websites!—according to w3techs.com/blog/entry/w... Reminder you can use this completely for free, even if you don’t use Cloudflare as your CDN!

Screenshot from w3tech.com. Read Bluesky post for breakdown.

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Andrey Sitnik @en.sitnik.es · 08/07/2026

The unsung heroes of our time. @43081j.com from the @e18e.dev community cut 1 MB from caniuse-lite. With 700M installs per month, that saves around 700 TB of global internet traffic every month. github.com/browserslist...

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Ryan Townsend @twnsnd.com · 07/07/2026

Vary support (with normalisation) also dropped for cache [1] AND for worker sub-requests [2] [1]: developers.cloudflare.com/changelog/po... [2]: developers.cloudflare.com/changelog/po...

developers.cloudflare.com

Cache multiple versions of a URL with Vary

Cache Rules now support the origin Vary response header, so the same URL can hold multiple cached versions selected by the request headers your origin varies on.

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Ryan Townsend @twnsnd.com · 06/07/2026

Thank god I don’t have to keep this quiet any longer! Looking forward to having you onboard @philhawksworth.dev! 🎉

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Josh Nesbitt @joshnesbitt.dev · 03/07/2026

I've just hit publish on the photos and videos for the last conference in May. It's wonderful to reflect now a few months have passed on what an amazing day it was. I'll look back at the years we ran All Day Hey! with incredibly fond memories.

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Ryan Townsend @twnsnd.com · 28/06/2026

@tomayac.com how does this intersect with chromestatus.com/feature/5202...?

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Ryan Townsend @twnsnd.com · 24/06/2026

Challenge accepted! I was going to thank you for correcting my spelling but it appears we both have it wrong! It’s ‘Calippo’!

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Ryan Townsend @twnsnd.com · 24/06/2026

What’s the daily recommended intake of Calipos for an adult male? Asking for a friend.

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Barry Pollard @tunetheweb.com · 23/06/2026

It's happening... We've asked Chromium API owners for permission to ship The Soft Navigation work to allow measuring of Core Web Vitals for SPAs!!

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Ryan Townsend @twnsnd.com · 23/06/2026

This number is now <43 😉

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Ryan Townsend @twnsnd.com · 16/06/2026

So wait... Server-Side Rendering meant compiling your HTML into massive JavaScript bundles all along?! I've been doing it wrong!

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Ryan Townsend @twnsnd.com · 16/06/2026

Is this being recorded? Sounds like an important topic!

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Eric Portis @ericportis.com · 08/06/2026

Hey! Look at that! <img sizes=auto> in Safari 27! webkit.org/blog/17967/n...

webkit.org

News from WWDC26: WebKit in Safari 27 beta

Safari 27 beta is here.

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Ryan Townsend @twnsnd.com · 04/06/2026

Cumulative Layout Shift (the Layout Instability API)

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Ryan Townsend @twnsnd.com · 02/06/2026

I’m trying to draw lines between two anchor elements, like a flow diagram would, so yeah borders (or a hacky alternative) are necessary.

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Ryan Townsend @twnsnd.com · 02/06/2026

@bram.us are there any plans to make the "positioning an between two anchors, allowing for crossing either axis" any cleaner? (basically your demo from SotB youtu.be/VD_q3x9GnZs?...) I've just had a need to do this and while it works... I'm not proud of this committing this code.

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Ryan Townsend @twnsnd.com · 01/06/2026

We definitely need more image codecs, right? Apple have been working on a machine-learning-based image codec with some impressive stats: apple.github.io/ml-pico/ #webperf

apple.github.io

What Matters in Practical Learned Image Compression

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JSHeroes @jsheroes.io · 28/05/2026

beating our blues by watching this amazing aftermovie youtu.be/EmNVwmB7k90

youtu.be

Aftermovie JSHeroes 2026

YouTube video by JSHeroes

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Ryan Townsend @twnsnd.com · 23/05/2026

Still not over how wonderful @jsheroes.io was. 💯 post-conference blues. I’ve been fortunate enough to speak at over 20 conferences now and this was in a league of its own. So many new friends made, attendees, speakers, organisers and volunteers alike ❤️ Well done @alexmoldovan.dev and crew 👏🏻👏🏻👏🏻

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Ryan Townsend @twnsnd.com · 21/05/2026

Get your tickets to @perfnow.nl before prices rise on July 1st! I say this every year and I will continue to say it: there is nowhere better to learn about #webperf 🚀 The speaker line-up is always absolute gold and the hallway track is just as valuable.

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Ryan Townsend @twnsnd.com · 20/05/2026

You nailed the presentation anyway, I doubt anyone in the audience would have even noticed if you hadn’t mentioned it!

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