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Reposted by gilbertococchi

Chrome for Developers @developer.chrome.com · 1d

Stop guessing and start debugging responsive styles automatically with Chrome DevTools MCP → goo.gle/3IPT2No

Learn how a coding agent can find a visual bug on a specific device size, analyze the source code, update the CSS, and verify the fix with a live browser screenshot.

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Barry Pollard @tunetheweb.com · 8d

“Added preview support for Event Timing API (Interaction to Next Paint)”

#webperf #CoreWebVitals

IntentToShip @intenttoship.dev · 8d

Webkit: Release Notes for Safari Technology Preview 229

webkit.org

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Alex Russell @infrequently.org · 16d

It's a bit of a surprise to me, but there are still tickets available for performance.now(), the most important web performance conference of the year:

perfnow.nl

I'm booking my travel, and hope to see you in Amsterdam next month!

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.

perfnow.nl

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Addy Osmani @addyosmani.bsky.social · 18d

Announcing Chrome DevTools MCP! 🚀

Connect your AI coding agent to Chrome's powerful automation & debugging capabilities with ease.

Learn more: developer.chrome.com/blog/chrome-...

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Una Kravets @una.im · 24d

Upvote this feature for Interop 2026: github.com/web-platform...

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gilbertococchi @gilbertococchi.bsky.social · 27d

This is great news!!!
Congrats Adam!
Can't wait to hear what you will do at Shopify!

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gilbertococchi @gilbertococchi.bsky.social · Sep 10

MDN just added a new section in the WebSocket API guide called "Working with the bfcache".

Check this out if you are using WebSocket, you may be blocking BFCache and making user experience worse!

developer.mozilla.org/en-US/docs/W...

Writing WebSocket client applications - Web APIs | MDN

In this guide we'll walk through the implementation of a WebSocket-based ping application. In this application, the client sends a

developer.mozilla.org

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Bramus @bram.us · Sep 10

If you thought we were done with View Transitions, guess again!

A feature Chrome is working on, is “Scoped View Transitions”, which allow you to scope a VT to a subtree of the DOM.

This unlocks things like concurrent transitions and prevents layering issues.

developer.chrome.com/blog/scoped-...

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Henri Helvetica 🧑🏾‍🚀🇭🇹 @henrihelvetica.bsky.social · Sep 10

This is happening today in ~3hrs. @weston.ruter.net joins me to discuss benchmarks as well as performance updates made on the #Wordpress Core platform. Join us!
✨ SPDY STREAM 009 ✨
🗣️ Westin Ruter
📆 Wednesday September 10th, 2025
⏰ 1pm EDT, 10am PDT
🔗 bit.ly/spdy-stream-...

Image of a rally car that's white with some green and red details, and caption as follows: SPDY stream. Performance people and projects. Wednesday, September 10, 1 PM Eastern daylight time. Online.

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Barry Pollard @tunetheweb.com · Sep 9

🆕 The 202508 Chrome User Experience (CrUX) release is now live on BigQuery!

Check out the announcement post for the full info:
groups.google.com/a/chromium.o...

Highlights below 👇

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Bramus @bram.us · Aug 29

Did you know Cross-Document View Transitions are being used in production on Google Search?

developer.chrome.com/blog/google-... is a case study I co-authored with one of our engineers from the Google Search UI team.

Case Study: How Google created a connected experience for its new AI Mode using view transitions | Blog | Chrome for Developers

Bridging the gap between MPA and SPA: Making the transition into Google Search AI Mode feel seamless and connected with cross-document view transitions.

developer.chrome.com

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gilbertococchi @gilbertococchi.bsky.social · Aug 25

performance.now() is coming to Amsterdam this October!
This event is great both for the inspirational talks as well as for the opportunity to meet folks from different companies and backgrounds to discuss how to successfully tackle web performance challenges!

performance.now() conference @perfnow.nl · Jun 25

performance.now(), the web performance conference, 30th and 31st of October, Amsterdam. Single track, the best speakers in the industry, plenty of your performance-mad peers around to have fascinating conversations. What's not to like? Let's introduce our speakers ...
perfnow.nl

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.

perfnow.nl

5 5

gilbertococchi @gilbertococchi.bsky.social · Aug 21

It's really common in Italy to find two menu sides, one with Red and White pizzas.
Having said that it depends on the ingredients.
If you have really good Ingredients, you may not need all that red industrial tomato sauce...

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Bramus @bram.us · Aug 19

Very exciting news. With these changes, you can more easily build accordions such as seen in this recording.

developer.chrome.com/blog/styling...

Currently supported in Chrome and Safari, and soon Firefox!

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performance.now() conference @perfnow.nl · Jun 25

performance.now(), the web performance conference, 30th and 31st of October, Amsterdam. Single track, the best speakers in the industry, plenty of your performance-mad peers around to have fascinating conversations. What's not to like? Let's introduce our speakers ...
perfnow.nl

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.

perfnow.nl

1 20 29

Reposted by gilbertococchi

Paul Irish @paul.irish · May 28

The Chrome DevTools Performance panel just leveled up! 🚀 Here's a 69-second taste of the new hotness.

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gilbertococchi @gilbertococchi.bsky.social · May 28

For some developers and/or framework authors I presume a notification could help understanding when a new feature is coming to land some experiment to send feedback and verify whether the feature suite their needs.

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gilbertococchi @gilbertococchi.bsky.social · May 28

I think so, I personally subscribed to blink-dev because I am curious about when something starts to be available for experiment and be notified when something ships.

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gilbertococchi @gilbertococchi.bsky.social · May 27

BFCache can hugely influence your page performance for URLs high on Back Forward Navigation types.

If you use CrUX or RUM and you see a lot of traffic in % attributed on Back Forward and few on BFCache maybe you are leaving money on the table!
CruXVis can help you measuring this opportunity!

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Jen Simmons @jensimmons.bsky.social · May 22

The one where I muse about how this simple bit of code radically changes how the web itself seems to behave…

webkit.org/blog/16967/t...

Two lines of Cross-Document View Transitions code you can use on every website today

Arguably, the most profound thing about the web is the ability to link one page to another.

webkit.org

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Barry Pollard @tunetheweb.com · May 7

We've just published v5.0.0 of the web-vitals JavaScript library for measuring Core Web Vitals.

github.com/GoogleChrome...

As a major release, this includes a number of breaking changes as detailed in the upgrading doc:

github.com/GoogleChrome...

Please read carefully before upgrading.

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GitHub - GoogleChrome/web-vitals: Essential metrics for a healthy site.

Essential metrics for a healthy site. Contribute to GoogleChrome/web-vitals development by creating an account on GitHub.

github.com

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Barry Pollard @tunetheweb.com · Apr 30

We're updating Lighthouse to be based on the same Insights we recently launched in the Performance panel of Chrome DevTools.

developer.chrome.com/blog/moving-...

This will help align the tools but will be a breaking change. So we'll make that change in Lighthouse 13 in 6 months.

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Lighthouse is moving to performance insight audits | Blog | Chrome for Developers

Lighthouse is moving to performance insight audits

developer.chrome.com

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Barry Pollard @tunetheweb.com · Apr 15

WordPress 6.8 is out today. Including Speculation Rules in Core thanks ot some amazing work by @felixarntz.bsky.social !!
make.wordpress.org/core/2025/03...

It's a very conservative prefetch-on-mousedown default but site owners (or plugins) can customise that:
make.wordpress.org/core/2025/03...

WordPress 6.8 Field Guide

This guide outlines major developer features and breaking changes in 6.8 and is published in the Release Candidate phase to help inform WordPress extending developers, Core developers, and others. …

make.wordpress.org

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gilbertococchi @gilbertococchi.bsky.social · Apr 16

FYI: developer.chrome.com/docs/css-ui/...

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Barry Pollard @tunetheweb.com · Apr 11

Alternatively, the CrUX History APIs are free and you can build your own dashboards as you see fit.

There are also LOTS of great CrUX tools out there — many with a free offering to view history such as Treo, Calibre...etc. So that's another option.

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