Barry Pollard
@tunetheweb.com
Web Performance Developer Advocate at Google Chrome helping to make the web go faster! All opinions my own.
Reposted by Barry Pollard
This feature in @developer.chrome.com's DevTools is so helpful. Every time I get stuck on a calc() or other CSS functions, I solve the bug much quicker with it.
Thanks to everyone who worked on this! 👌
Thanks to everyone who worked on this! 👌
January 9, 2026 at 9:21 AM
This feature in @developer.chrome.com's DevTools is so helpful. Every time I get stuck on a calc() or other CSS functions, I solve the bug much quicker with it.
Thanks to everyone who worked on this! 👌
Thanks to everyone who worked on this! 👌
Reposted by Barry Pollard
The Chrome Identity and Payments team in Waterloo Canada is hiring several early/mid-career developers. I'm on the lookout for exceptional candidates with a passion for browsers and/or the identity/payments space! www.linkedin.com/posts/rick-b...
January 9, 2026 at 1:46 AM
The Chrome Identity and Payments team in Waterloo Canada is hiring several early/mid-career developers. I'm on the lookout for exceptional candidates with a passion for browsers and/or the identity/payments space! www.linkedin.com/posts/rick-b...
Reposted by Barry Pollard
Web Weekly has some free ad slots starting mid-January.
If you want to reach 6.3k Frontend devs who care about the web and build quality websites, you should check it out. 👇
webweekly.email/advertise
And of course, you'll earn karma points for supporting indie publishing. 🫣
If you want to reach 6.3k Frontend devs who care about the web and build quality websites, you should check it out. 👇
webweekly.email/advertise
And of course, you'll earn karma points for supporting indie publishing. 🫣
January 8, 2026 at 12:52 PM
Web Weekly has some free ad slots starting mid-January.
If you want to reach 6.3k Frontend devs who care about the web and build quality websites, you should check it out. 👇
webweekly.email/advertise
And of course, you'll earn karma points for supporting indie publishing. 🫣
If you want to reach 6.3k Frontend devs who care about the web and build quality websites, you should check it out. 👇
webweekly.email/advertise
And of course, you'll earn karma points for supporting indie publishing. 🫣
Think it’s about time I attended @perfnow.nl ‘s sister conference. Will I see you there?
// clears throat
// taps mic
"One two three. Test. One two three"
"Welcome to CSS D ... no, I need more gravitas. Could you turn up the bass just a little bit?"
// taps mic
"One two three. Test. One two three"
"Welcome to CSS D ... no, I need more gravitas. Could you turn up the bass just a little bit?"
January 8, 2026 at 11:24 AM
Think it’s about time I attended @perfnow.nl ‘s sister conference. Will I see you there?
Reposted by Barry Pollard
The first Web Weekly of 2026 is going out. As always, it's jam-packed!
For the first time, the online version won't live on my blog but on the new Web Weekly site.😱 That's wild, isn't it?😅
webweekly.email/archive/web-...
If you're into web dev news close to the platform, you should check it out!
For the first time, the online version won't live on my blog but on the new Web Weekly site.😱 That's wild, isn't it?😅
webweekly.email/archive/web-...
If you're into web dev news close to the platform, you should check it out!
January 6, 2026 at 9:32 PM
The first Web Weekly of 2026 is going out. As always, it's jam-packed!
For the first time, the online version won't live on my blog but on the new Web Weekly site.😱 That's wild, isn't it?😅
webweekly.email/archive/web-...
If you're into web dev news close to the platform, you should check it out!
For the first time, the online version won't live on my blog but on the new Web Weekly site.😱 That's wild, isn't it?😅
webweekly.email/archive/web-...
If you're into web dev news close to the platform, you should check it out!
Reposted by Barry Pollard
Huge congrats and kudos to @stoyan.me for running it and to all the authors for writing articles for this year's Web Performance calendar.
calendar.perfplanet.com/2025/
The quality was very high, and it feels like every second post was a banger!
calendar.perfplanet.com/2025/
The quality was very high, and it feels like every second post was a banger!
2025 Archives
The speed geek's favorite time of year
calendar.perfplanet.com
January 5, 2026 at 10:48 PM
Huge congrats and kudos to @stoyan.me for running it and to all the authors for writing articles for this year's Web Performance calendar.
calendar.perfplanet.com/2025/
The quality was very high, and it feels like every second post was a banger!
calendar.perfplanet.com/2025/
The quality was very high, and it feels like every second post was a banger!
Reposted by Barry Pollard
Ow yeah! 😎
FYI: you can start using customizable select *TODAY* because it is the perfect progressive enhancement: in browser with no support you get the status quo which is just a regular select (which you can also style up to a certain extent).
FYI: you can start using customizable select *TODAY* because it is the perfect progressive enhancement: in browser with no support you get the status quo which is just a regular select (which you can also style up to a certain extent).
Gecko: Intent to Prototype: "Customizable Select"
Gecko: Intent to Prototype: "Customizable Select"
Gecko: Intent to Prototype: "Customizable Select"
groups.google.com
January 6, 2026 at 6:06 PM
Ow yeah! 😎
FYI: you can start using customizable select *TODAY* because it is the perfect progressive enhancement: in browser with no support you get the status quo which is just a regular select (which you can also style up to a certain extent).
FYI: you can start using customizable select *TODAY* because it is the perfect progressive enhancement: in browser with no support you get the status quo which is just a regular select (which you can also style up to a certain extent).
Reposted by Barry Pollard
Missing the viewport meta tag? Your mobile users are waiting an extra 300ms on every single tap. Browsers add that delay to check for double-tap zooming. One line of HTML fixes it.
requestmetrics.com/blog/lightho...
#WebPerf #SEO
requestmetrics.com/blog/lightho...
#WebPerf #SEO
Understanding Lighthouse: Has a Viewport Meta Tag
What does "Has a meta name viewport tag with width or initial-scale" mean in Lighthouse? This audit checks if your page is mobile-ready. Missing it...
requestmetrics.com
January 6, 2026 at 1:50 PM
Missing the viewport meta tag? Your mobile users are waiting an extra 300ms on every single tap. Browsers add that delay to check for double-tap zooming. One line of HTML fixes it.
requestmetrics.com/blog/lightho...
#WebPerf #SEO
requestmetrics.com/blog/lightho...
#WebPerf #SEO
Reposted by Barry Pollard
time to get back into everything!
if you know of a tool or library you use which has perf issues, please do nerdsnipe me 😂
if you know of a tool or library you use which has perf issues, please do nerdsnipe me 😂
January 5, 2026 at 4:51 PM
time to get back into everything!
if you know of a tool or library you use which has perf issues, please do nerdsnipe me 😂
if you know of a tool or library you use which has perf issues, please do nerdsnipe me 😂
I wrote these docs!
TIL: Compression Dictionary Transport 💡
A new HTTP feature that can dramatically shrink the size of your responses, especially when serving content that changes often but includes a lot of repeated structure (think: JSON, JS, CSS).
Learn more 👇
developer.mozilla.org/en-US/docs/...
A new HTTP feature that can dramatically shrink the size of your responses, especially when serving content that changes often but includes a lot of repeated structure (think: JSON, JS, CSS).
Learn more 👇
developer.mozilla.org/en-US/docs/...
Compression Dictionary Transport - HTTP | MDN
Compression Dictionary Transport is a way of using a shared compression dictionary to dramatically reduce the transport size of HTTP responses.
developer.mozilla.org
December 30, 2025 at 10:51 PM
I wrote these docs!
Reposted by Barry Pollard
My article for Performance Calendar is live, looking at tips to help focus when doing performance traces.
Web Performance Calendar day 28 when Ian Duffy shows us how to tame Chrome’s Performance panel: reduce noise, search fast, annotate, use Insights, and customize tracks
calendar.perfplanet.com/2025/tips-fo...
calendar.perfplanet.com/2025/tips-fo...
Tips for making the Performance Panel less overwhelming
Introduction
The Performance Panel is used for detailed investigations on traces captured during page load or during user interactions. It's a critical tool for understanding and debugging performanc...
calendar.perfplanet.com
December 28, 2025 at 5:18 PM
My article for Performance Calendar is live, looking at tips to help focus when doing performance traces.
Reposted by Barry Pollard
Lots of great stuff in this year's Perf Planet Advent/December series:
calendar.perfplanet.com/2025/
calendar.perfplanet.com/2025/
December 28, 2025 at 3:39 AM
Lots of great stuff in this year's Perf Planet Advent/December series:
calendar.perfplanet.com/2025/
calendar.perfplanet.com/2025/
Reposted by Barry Pollard
Web Performance Calendar day 27 with @nucliweb.net on using Chrome DevTools for fun and profit: inspect heavy files in Network panel, monitor Core Web Vitals, record performance traces, validate optimizations, and more.
calendar.perfplanet.com/2025/chrome-...
calendar.perfplanet.com/2025/chrome-...
Chrome DevTools for Debugging Web Performance
This is a step-by-step guide on how I use Chrome DevTools (DevTools from now on) to detect Web Performance issues on a website, as well as validate hypotheses to fix some of the problems found.
Discl...
calendar.perfplanet.com
December 27, 2025 at 2:47 PM
Web Performance Calendar day 27 with @nucliweb.net on using Chrome DevTools for fun and profit: inspect heavy files in Network panel, monitor Core Web Vitals, record performance traces, validate optimizations, and more.
calendar.perfplanet.com/2025/chrome-...
calendar.perfplanet.com/2025/chrome-...
Reposted by Barry Pollard
Web Performance Calendar day 26 with Sébastien Mischler on HTML streaming/flushing and how this old trick (featured in the first edition of the calendar) applies to today's CSR world. Show content now, not after JS finishes thinking. Fast pages, happy users.
calendar.perfplanet.com/2025/revisit...
calendar.perfplanet.com/2025/revisit...
Revisiting HTML streaming for modern web performance
Introduction
Modern web performance issues often come from delayed rendering rather than network speed. Client-side hydration and heavy JavaScript pipelines can prevent browsers from showing content ...
calendar.perfplanet.com
December 26, 2025 at 2:20 PM
Web Performance Calendar day 26 with Sébastien Mischler on HTML streaming/flushing and how this old trick (featured in the first edition of the calendar) applies to today's CSR world. Show content now, not after JS finishes thinking. Fast pages, happy users.
calendar.perfplanet.com/2025/revisit...
calendar.perfplanet.com/2025/revisit...
Reposted by Barry Pollard
Just wow. @pluralistic.net.web.brid.gy came out swinging in this article. He's right though and that's the coolest part.
December 26, 2025 at 12:47 PM
Just wow. @pluralistic.net.web.brid.gy came out swinging in this article. He's right though and that's the coolest part.
Reposted by Barry Pollard
Fixing the URL params performance penalty. @tunetheweb.com introduced No-Vary-Search, a new HTTP header that helps browsers and CDNs ignore irrelevant query params and improve caching efficiency. For now, supported only in Chrome 141. #performance #http
calendar.perfplanet.com/2025/fixing-...
calendar.perfplanet.com/2025/fixing-...
December 24, 2025 at 12:19 PM
Fixing the URL params performance penalty. @tunetheweb.com introduced No-Vary-Search, a new HTTP header that helps browsers and CDNs ignore irrelevant query params and improve caching efficiency. For now, supported only in Chrome 141. #performance #http
calendar.perfplanet.com/2025/fixing-...
calendar.perfplanet.com/2025/fixing-...
Reposted by Barry Pollard
Oh hey, come work with me!
We're seeking an earlier-career front-end dev who is able to work in-office (multiple US locations).
Check it out if you have interest and experience in: #designsystems #CSS #a11y #webcomponents
adobe.design/jobs/job-pos...
We're seeking an earlier-career front-end dev who is able to work in-office (multiple US locations).
Check it out if you have interest and experience in: #designsystems #CSS #a11y #webcomponents
adobe.design/jobs/job-pos...
Design Engineer, Spectrum Web
Join us and help build the next generation of our world-famous tools.
adobe.design
December 23, 2025 at 5:28 PM
Oh hey, come work with me!
We're seeking an earlier-career front-end dev who is able to work in-office (multiple US locations).
Check it out if you have interest and experience in: #designsystems #CSS #a11y #webcomponents
adobe.design/jobs/job-pos...
We're seeking an earlier-career front-end dev who is able to work in-office (multiple US locations).
Check it out if you have interest and experience in: #designsystems #CSS #a11y #webcomponents
adobe.design/jobs/job-pos...
This one got released rather quietly and I think could do with a bit more attention!
Read about how to avoid caching performance penalties due to tracking query params and the like!
Read about how to avoid caching performance penalties due to tracking query params and the like!
Web Performance Calendar day 23 with @tunetheweb.com on configuring caches to ignore non-content-affecting URL parameters and reclaim performance. No more of this query string = cache miss nonsense.
calendar.perfplanet.com/2025/fixing-...
calendar.perfplanet.com/2025/fixing-...
Fixing the URL params performance penalty
Tales of two pages…
What's the difference between these two pages?:
https://www.example.com/
https://www.example.com/?utm_source=email
I mean they've got different URLs, but many of us would ...
calendar.perfplanet.com
December 23, 2025 at 1:57 PM
This one got released rather quietly and I think could do with a bit more attention!
Read about how to avoid caching performance penalties due to tracking query params and the like!
Read about how to avoid caching performance penalties due to tracking query params and the like!
Good explanation of fetch priority!
🤔 What are request priorities, and why do we even need the HTML fetchpriority attribute?
Check out my new video to find out!
www.youtube.com/watch?v=yoa7...
Check out my new video to find out!
www.youtube.com/watch?v=yoa7...
Apply fetchpriority=High To Optimize LCP Image Discovery
The HTML fetchPriority attribute helps browsers load more quickly, resulting in better Largest Contentful Paint scores.
00:00 Introduction
00:16 Why do resource priorities matter?
01:17 Why do we…
www.youtube.com
December 19, 2025 at 1:55 PM
Good explanation of fetch priority!
Reposted by Barry Pollard
Web Performance Calendar day 18 with Amrik Malhans on breaking down LCP to pinpoint what's slowing down the page exactly and where to focus your UX-optimizing efforts
calendar.perfplanet.com/2025/the-ana...
calendar.perfplanet.com/2025/the-ana...
The Anatomy of LCP - A Deep Dive into Sub-Parts
Optimizing LCP (Largest Contentful Paint) is not just reducing the file size of your images, there's a lot more that goes into optimizing the loading strategy - and you can only grasp where the bottle...
calendar.perfplanet.com
December 18, 2025 at 11:37 PM
Web Performance Calendar day 18 with Amrik Malhans on breaking down LCP to pinpoint what's slowing down the page exactly and where to focus your UX-optimizing efforts
calendar.perfplanet.com/2025/the-ana...
calendar.perfplanet.com/2025/the-ana...
Reposted by Barry Pollard
What are your biggest complaints about using the web right now?
December 17, 2025 at 12:07 AM
What are your biggest complaints about using the web right now?
Answering some of your questions about what it means now LCP and INP are "Baseline Newly available" across all major browsers. Let me know if you have any more!
web.dev/blog/lcp-and...
#CoreWebVitals #webperf
web.dev/blog/lcp-and...
#CoreWebVitals #webperf
LCP and INP are now Baseline Newly available | Blog | web.dev
LCP and INP are now Baseline Newly available as of December 12, 2025.
web.dev
December 17, 2025 at 9:42 AM
Answering some of your questions about what it means now LCP and INP are "Baseline Newly available" across all major browsers. Let me know if you have any more!
web.dev/blog/lcp-and...
#CoreWebVitals #webperf
web.dev/blog/lcp-and...
#CoreWebVitals #webperf
Nice little tool, and interesting stats.
www.madebyolof.com/bluesky-wrap...
This year on Bluesky I wrote 202 posts and 669 replies. I received 4,016 likes, whereas 224 was from my most popular post, and apparently I love saying "use" and 🧵!
www.madebyolof.com/bluesky-wrap...
This year on Bluesky I wrote 202 posts and 669 replies. I received 4,016 likes, whereas 224 was from my most popular post, and apparently I love saying "use" and 🧵!
www.madebyolof.com
December 17, 2025 at 9:15 AM
Nice little tool, and interesting stats.
www.madebyolof.com/bluesky-wrap...
This year on Bluesky I wrote 202 posts and 669 replies. I received 4,016 likes, whereas 224 was from my most popular post, and apparently I love saying "use" and 🧵!
www.madebyolof.com/bluesky-wrap...
This year on Bluesky I wrote 202 posts and 669 replies. I received 4,016 likes, whereas 224 was from my most popular post, and apparently I love saying "use" and 🧵!
Reposted by Barry Pollard
Speeding up CSS with compression dictionaries. @yoav.ws shows how combining critical and full CSS via compression dictionaries cuts bandwidth and accelerates page transitions. Works now in Chromium. #performance #css
calendar.perfplanet.com/2025/how-to-...
calendar.perfplanet.com/2025/how-to-...
December 16, 2025 at 11:49 AM
Speeding up CSS with compression dictionaries. @yoav.ws shows how combining critical and full CSS via compression dictionaries cuts bandwidth and accelerates page transitions. Works now in Chromium. #performance #css
calendar.perfplanet.com/2025/how-to-...
calendar.perfplanet.com/2025/how-to-...
Reposted by Barry Pollard
Lazy loading out-of-viewport images can make the main content on your website load faster.
⬇️ Learn how in this video.
www.youtube.com/watch?v=CPJf...
⬇️ Learn how in this video.
www.youtube.com/watch?v=CPJf...
How to defer offscreen images
Learn how to make your website load faster by lazy loading out-of-viewport images.
00:00 Page speed impact of offscreen images
01:18 Lazy load offscreen images in DebugBear
01:37 Result of the…
www.youtube.com
December 16, 2025 at 1:12 PM
Lazy loading out-of-viewport images can make the main content on your website load faster.
⬇️ Learn how in this video.
www.youtube.com/watch?v=CPJf...
⬇️ Learn how in this video.
www.youtube.com/watch?v=CPJf...