Barry Pollard
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tunetheweb.com
Barry Pollard
@tunetheweb.com
2.8K followers 390 following 1.1K posts
Web Performance Developer Advocate at Google Chrome helping to make the web go faster! All opinions my own.
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tunetheweb.com
The 2025 State of HTML survey is out

2025.stateofhtml.com

And I love the opening stat — Lazy Loading FTW!

Built-in, simple to use, attributes and elements are HTML's super power. And you can see that reflect in other attributes with the largest increase (details/summary, dialog, fetchpriority!)
70% Proportion of respondents having used lazy loading, the most-used feature among those with the “Newly Available” Baseline status. Chart of the largest increased features including: lazy loading, srcset and sizes, <details> and <summary>, Content-Security-Policy, <dialog>, Defining Custom Properties with <template>, Shadow DOM, <search>, fetchpriority, details name.
December 16, 2025 at 9:26 AM
tunetheweb.com
The other thing I see is comparisons to game development which can render at the full speed of monitors—e.g. 120 fps, or even higher! That's nice, and browsers can get close for non-JS rendering.

Check out this for a real cool example! (at 60fps):
x.com/pushmatrix/s...

9/12
December 9, 2025 at 12:33 PM
tunetheweb.com
But you can also see the "processing duration" of the largest INP interaction by hovering, and each one by expanding.

But, as I say, input delay can be other JS running, and presentation delay can also be under the devs control—somewhat. Especially for things like typing.

8/12
Screenshot of Chrome DevTools performance panel with the 56ms INP event hovered showing the breakdown of that 56ms into 1ms Input Delay, 0ms processing duration, and 54ms presentation delay. Below, in the interactions log, you can expand any single interaction to see a similar breakdown.
December 9, 2025 at 12:33 PM
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Did my own take on this.

I love the way AI really enhances the product and makes it 10x more useful...
An AI-generated abomination of an ice lolly with a wrapper with the React logo and "Modern Web Development" written on it, covering a Neapolitan ice cream ice lolly, with the bottom chocolate layer leaking out to a gooey puddle with the letters "RSC" written in sprinkles on top of the puddle. 11 extra lollypops sticks with AI written on them, have been shoved in, seemingly at random and for no real purpose.
December 4, 2025 at 1:27 PM
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Oh I’ve spent my afternoon dealing with an ungodly amount of lights. And three very excitable young children who not so much decorated the tree as vomited Christmas decorations upon it.
A Christmas tree. With lights correctly placed on horizontally. And an ungodly amount of bubbles.
November 29, 2025 at 5:09 PM
tunetheweb.com
These are in Chrome Canary already.

Firefox and Safari Tech Preview have paintTime but not presentationTime. FF are working on it IIRC, but Safari's rendering pipeline is a bit different so even if they do add that, it'll likely be a bit earlier than when pixels actually hit the screen.

3/4
Chrome Canary includes paintTime and presentationTime are as part of LCP entries Firefox has paintTime but not presentationTime (yet?) Safari also has paintTime but not presentationTime
November 27, 2025 at 3:03 PM
tunetheweb.com
Weird!
Public transport option with Start and Save
November 27, 2025 at 12:29 PM
tunetheweb.com
A quick check shows they are using AWS via Atlassian for me:
Cloudflare's system status page appears to be served by AtlassianEdge in Amazon cloudfront according to their HTTP Headers
November 18, 2025 at 5:56 PM
tunetheweb.com
Chrome 143 will start rolling out today (most users get it next week).

It includes a new set of options for your webperf traces — including saving sources & source maps:
developer.chrome.com/docs/devtool...

This makes it easier for those viewing traces outside of the page load to get more context.
Save performance trace options: - Include annotations - Include resource content - Include script source maps - Compress with gzip
November 18, 2025 at 5:10 PM
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Well I guess that at least answers my question....

downforeveryoneorjustme.com
https://downforeveryoneorjustme.com/ is unavilable
November 18, 2025 at 1:15 PM
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That makes me cry! Luckily it's fixed on Chrome Canary
Detail of the Chrome address bar with an AI Mode button that is rounded and it DOES match the padding of inline and block. Looks great.
November 18, 2025 at 11:24 AM
tunetheweb.com
On a related note, have you seen full split browsing mode yet?
Chrome with a split tab of BlueSky and Example.com, along with additional tabs for Google and bbc news
November 1, 2025 at 12:50 PM
tunetheweb.com
Q1. Yup. Hopefully you saw the NOT part of WHERE rules in my talk:
developer.chrome.com/docs/web-pla...

Q2. Yup.
developer.chrome.com/docs/web-pla...
Chrome will also prevent speculations being used in certain conditions including: Save-Data. Energy saver when enabled and on low battery. Memory constraints. When the "Preload pages" setting is turned off (which is also explicitly turned off by Chrome extensions such as uBlock Origin). Pages opened in background tabs. Chrome also does not render cross-origin iframes on prerendered pages until activation. All of these conditions aim to reduce the impact of over-speculation when it would be detrimental to users.
October 31, 2025 at 2:45 PM
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I also extracted the version out of curiosity (in the same sheet)
3.2.1 is far and away the most popular with 786,512 origins, way about the next version (2.8.0 with 40,819)
October 16, 2025 at 10:16 PM
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We want to congratulate @firefox.com and @firefoxperformance.bsky.social for shipping the Event Timing API in Firefox 144, meaning both INP (which is calculated from Event Timing) and LCP (that they shipped previously) can be measured in that browser. More Core Web Vitals for all!

5/7
Firefox now supports PerformanceEventTiming.interactionId, allowing developers to group related input events. This enables support for the Interaction to Next Paint (INP) responsiveness metric.
October 14, 2025 at 5:21 PM
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“Those who cannot remember the past are condemned to repeat it.” George Santayana
October 12, 2025 at 9:34 AM
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React 19.2 has shipped including support for the DevTools Extensibility API so you can understand what React is doing when, and how that relates to the rest of the performance profile 🥳 🎉

react.dev/blog/2025/10...
Chrome DevTools performance trace showing some custom tracks. Scheduler Custom Track including Blocking, Transition, Suspense, and Idle sub tracks. And Components custom track.
October 2, 2025 at 10:47 AM
tunetheweb.com
Core Web Vitals mystery for ya:

Why does Google Search Console same my LCP is bad, but every example URL has good LCP?

I see developers asking: How can this happen? Is GSC wrong? (I'm willing to bet it is not!) What can you do about it?

This is admittedly confusing so let's dive in...

🧵 1/12
Screenshot of Core Web Vitals graph in Google Search Console, with the URLs greyed out. The Group LCP is 2.6 seconds and so the group is in amber and saying there is an issue as it's longer than the 2.5 seconds "good" threshold. Yet all the examples have green LCPs of 1.7 seconds, 2.4 seconds, 1.2 seconds...etc. which is confusing.
October 1, 2025 at 1:36 PM
tunetheweb.com
Drew this today to explain where we are on the AI hype cycle at the moment. Feel free to use…
The Gartner Hype cycle staring with Technology trigger, quickly ramping up to the Peak of inflated expectations before crashing down in the Trough of disillusionment before raising back up in the Slope of enlightenment and then settling in a more realistic Plateau of productivity. We are here is marked WAY, WAY, WAY ABOVE the Peak of inflated expectations
September 26, 2025 at 12:40 PM
tunetheweb.com
And very amusing that “Friendly” option isn’t really an option 🤣
Spice level drop down with: “Friendly (Unavailable)”, “Irritated (Default)”, “Monty Python (Silly)”, and “Scathing (Nuclear)” options.
September 23, 2025 at 11:23 AM
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I’d rather they were more honest and just said why they use cookies, why that’s needed, and offer Accept All, Reject All or Customize options.

Kinda like this one:
Cookie banner which doesn’t claim they value my privacy but explains why they use cookies and offers “Accept All”, “Customize” and “Deny” buttons.
August 27, 2025 at 10:55 PM
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Two pro webperf tips!

Are you using Annotations in your performance traces?
developer.chrome.com/docs/devtool...

And even when not needing to annotate, Gemini AI auto-annotations can quickly give you an idea what a bit of the flame chart is doing without you needing to dig in yourself. Try it out!
August 18, 2025 at 3:43 PM
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🇮🇪 C(ORK) 🛫 LHR 🛬 PVG 🇨🇳

Barely home long enough to repack, I’m back at work and on the road again. This time I’m off to Shanghai for Google I/O Connect China 2025! Say hi if you’re going.
Join us in Google I/O Connect China white text on a black background with some imagery including a Panda and The Oriental Pearl Tower
August 11, 2025 at 5:09 AM
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Staring at it right now! Sadly won’t have time as have ziplining booked and also a training booking later.
Voss Gondola
August 8, 2025 at 11:42 AM
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Since you all seemed to appreciate the other photos, here some more from the Fjord cruise.

Oh and btw kids are enjoying themselves! And I do get an occasional “wow” or “cool”. They’re just not quite as enthralled as I am by the views! 😀
Pretty little boat houses in Flåm Angry clouds over Nærøyfjord Undredal village on the Aurlandsfjord Dyrdal - a tiny village on the Nærøyfjord
August 8, 2025 at 9:58 AM