Duffeh
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duffeh.bsky.social
Duffeh
@duffeh.bsky.social
1.1K followers 2.8K following 1.1K posts
Software engineer mainly working with javascript, nextjs, typescript and astro | talk about web performance | www.iankduffy.com | he/him
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duffeh.bsky.social
Seeing that BoJack horseman ended 6 years ago:
a cartoon of a horse cooking in a kitchen with a netflix logo on the stove
Alt: a cartoon of a horse cooking in a kitchen with a netflix logo on the stove
media.tenor.com
January 31, 2026 at 8:01 PM
duffeh.bsky.social
Decided to build a calendar grid with web components and view transitions to add animation for back and forward with view transition types.

iankduffy.com/examples/vie...
Calendar View Transition | IanKDuffy.com
An Article on Calendar View Transition
iankduffy.com
January 31, 2026 at 7:19 PM
Reposted by Duffeh
bell.bz
Resource heavy data centres running models that generated CSAM, assisted suicides and are all trained on stolen material.

The boat is already far too long gone for this type of groupthink bullshit.

Mozilla could have fully revived themselves in being opposition to AI, but another foot gun it is.
mozilla.org Mozilla @mozilla.org · 9d
The future of AI isn’t inevitable.
It’s a choice we should all have a say in making.

Our 2025 State of Mozilla report is live.
Choose your future: stateof.mozilla.org
January 27, 2026 at 9:42 PM
Reposted by Duffeh
mattzeunert.com
How does speed impact how visitors experience your website? And how can metrics hide real-world problems visitors face?

My new article explains the impact of performance on user experience and behavior + how to interpret metrics in context.

www.debugbear.com/blog/web-per...
How Web Performance Impacts User Experience | DebugBear
Learn how website speed impacts user experience and how you can measure performance and business outcomes.
www.debugbear.com
January 26, 2026 at 10:10 AM
Reposted by Duffeh
jhol95.bsky.social
Kemi discovering after 15 months that Robert Jenrick has been plotting in "secret"
January 15, 2026 at 11:24 AM
Reposted by Duffeh
stefanjudis.com
This week's Web Weekly is about to hit all the inboxes in just a little bit! As always, it's jam-packed. 🎉

webweekly.email/archive/web-...

If you're into web dev news close to the platform, you should check it out!
Web Weekly 180 - Iterator helpers - A new switch polyfill - Performance debugging tricks - command and commandfor - Scroll-triggered animations - font-size-adjust
January 13, 2026 at 2:28 PM
Reposted by Duffeh
bell.bz
The “that wasn’t very Christmassy” meme, but I’ve replaced “Christmassy” with “FIFA peace prizey”
January 3, 2026 at 2:04 PM
duffeh.bsky.social
Trump "military operation" list

youtu.be/V1508wboZXk
Animaniacs SING-ALONG 🎤 | Yakko’s World | WB Kids
YouTube video by WB Kids
youtu.be
January 3, 2026 at 7:01 PM
duffeh.bsky.social
a man and a woman are sitting at a table in front of a blackboard .
Alt: Abed and Britta from community, sat in the study room with the text this is the darkest most terrible timeline.
media.tenor.com
January 3, 2026 at 5:52 PM
duffeh.bsky.social
New year, new unit test failure due to someone forgetting to mock time.
January 2, 2026 at 6:08 PM
Reposted by Duffeh
frontenddogma.com
Tips for Making the Performance Panel Less Overwhelming, by @duffeh.bsky.social (@perfplanet.bsky.social):

https://calendar.perfplanet.com/2025/tips-for-making-the-performance-panel-less-overwhelming/

#performance #devtools #browsers #chrome #google
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 performance issues, but it can be overwhelming to newcomers. Previously I wrote about the Landing screen relea
calendar.perfplanet.com
January 1, 2026 at 9:27 AM
Reposted by Duffeh
stoyan.me
Web Performance Calendar day 31 article 4/5: @twnsnd.com on Compression Dictionaries to dramatically shrink responses (60–90% smaller than Brotli/GZIP). Why adoption is slow. Practical architectural decisions and implementation tips to get huge bandwidth wins.
calendar.perfplanet.com/2025/from-th...
From Theory to Tiny: Implementing Compression Dictionaries
Compression Dictionary Transport became an official IETF Proposed Standard this September (congratulations to Yoav Weiss & Pat Meenan 🎉). If you don't know what they are, I recommend watching Pat's wo...
calendar.perfplanet.com
December 31, 2025 at 5:19 PM
duffeh.bsky.social
My article for Performance Calendar is live, looking at tips to help focus when doing performance traces.
December 28, 2025 at 5:18 PM
Reposted by Duffeh
stoyan.me
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-...
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
Reposted by Duffeh
stoyan.me
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...
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
Reposted by Duffeh
852dude.bsky.social
Can't wait for the loosened up, non-perfect, but quickly shipped AI-enhanced updates to hit my banking and insurance services next year.

Im sure there will be no issues there at all.
software development in 2026 is going to require some to loosen up a little code doesn't have to be as perfectly crafted the way we did it pre-ai call it slop if you want, but if you're still demanding perfection on every pr while your competitors are shipping "slop" that works.. you're fighting from a disadvantaged position shipping velocity matters more than perfection
December 26, 2025 at 2:28 PM
Reposted by Duffeh
stoyan.me
Web Performance Calendar day 21 with Conor McCarthy and lessons learned from web perf client site reviews

calendar.perfplanet.com/2025/insight...
Insights from 100 site speed reviews in 2025
Over the course of 2025, I have completed 100 site speed reviews at DebugBear. This is a free service we offer to trial accounts looking for a brief assessment of their current web performance. Reque...
calendar.perfplanet.com
December 21, 2025 at 11:27 AM
Reposted by Duffeh
stoyan.me
Web Performance Calendar day 13 with Yoav Weiss (@yoav.ws) showing us a clever and creative way to ship *only* critical/necessary CSS for each page type (home, search, etc) while also avoiding duplicate code in the CSS bundles.

calendar.perfplanet.com/2025/how-to-...
How to load CSS (fast)
Loading styles on the web is something that looks trivial at first. You just add a <link rel=stylesheet> to your page (or <style> for inline styles) and you're done. But if you wanted to load CSS fas...
calendar.perfplanet.com
December 13, 2025 at 9:19 AM
duffeh.bsky.social
December 11, 2025 at 9:45 PM
Reposted by Duffeh
heypresents.com
With talks from an international line-up:

• Bramus Van Damme (Google)
• Léonie Watson (Tetra Logical)
• Fiona Safari (Tesco)
• Jake Archibald (Firefox)
• Alistair Shepherd (Series Eight)
• Cassie Evans (GSAP/Webflow)
• Phil Hawksworth (Deno)

ti.to/hey-presents...
December 8, 2025 at 9:11 AM
Reposted by Duffeh
una.im
🎉 And we're live! 🎉

We just launched CSS Wrapped 2025: our annual recap of all things CSS & web UI that landed in Chrome over the course of the year. 🚀

This is a big one! We highlighted 22 new features to help you build better on the web.

Check out: chrome.dev/css-wrapped-2025
CSS Wrapped 2025
Sculpt dynamic interfaces, stretch your imagination, and play with these 22 powerful new CSS features that landed in Chrome this year.
chrome.dev
December 8, 2025 at 5:08 PM
Reposted by Duffeh
bobsmyusername.bsky.social
Who has made this 🤣
Buster from the tv show ‘Arrested Development’ holding an arm full of plushies while he looks at his mother Lucille, saying, “these are my awards, mother, from FIFA.“
December 7, 2025 at 1:49 PM
duffeh.bsky.social
That ghost of yotei main story done 😭 after 62 hours.
Atsu and the wolf from the ghost of yotei on top of a snowy mountain
December 3, 2025 at 2:07 PM
duffeh.bsky.social
Heavy tooltip libraries about to get ripped out:
December 3, 2025 at 11:57 AM
Reposted by Duffeh
sia.codes
Hey folks, tomorrow myself and a bunch of other web perf experts are going to be talking about all things Core Web Vitals! Come join us live Dec 3 at 11am Eastern!

#webperf

cc @henrihelvetica.bsky.social
www.youtube.com/live/dQqqOYA...
✨ The Core Web Vitals Summit ✨
YouTube video by Henri Helvetica
www.youtube.com
December 2, 2025 at 9:07 PM