We just baked a new release at @pagespeaches.bsky.social
1️⃣ New History page.
2️⃣ Manual tests.
3️⃣ More synthetic tests.
Check the details here:
pagespeed.one/en/changelog...
Programming is more than just writing code.
That is why AI will not replace all programmers.
A SaaS is more than just a coded app.
That is why AI will not replace all SaaS businesses.
A CEO is more than just an email forwarder.
That is why AI will not replace all CEOs.
#WebPerf knowledge base is now global! 🌍
In PageSpeed.ONE we’ve translated ~100 in-depth articles to English.
Enjoy the deep dive! ⚡️
1️⃣ Know-how: pagespeed.one/en/know-how
2️⃣ Metrics: pagespeed.one/en/metrics
3️⃣ Blog: pagespeed.one/en/blog
4️⃣ Docs: pagespeed.one/en/documenta...
Snow & family time ❅
Good point. Me too, when I'm thinking about it.
Mostly I was "builder", but parts of my career "CSS code lover".
Developers are divided by motivation.
Some like to create websites, apps… — products for people.
Others like to write code. They love a specific technology.
The current wave of AI greatly supports the first group and threatens the second.
Where do you belong?
And don't miss these two posts from our PageSpeed.ONE team:
6️⃣ The Inconvenient Truth: How Web Performance Case Studies Undermine Our Relationship with Business
👉 calendar.perfplanet.com/2025/the-inc...
7️⃣ React 19.2: Further Advances INP Optimization
👉 calendar.perfplanet.com/2025/react-1...
5️⃣ Tips for making the Performance Panel less overwhelming [Technical]
The Performance panel in Chrome can be scary. This article helps you master it and find what actually matters.
👉 calendar.perfplanet.com/2025/tips-fo...
4️⃣ Chrome DevTools for Debugging Web Performance [Technical]
A great overview of new DevTools features from the last year. Essential reading for every front-end developer.
👉 calendar.perfplanet.com/2025/chrome-...
3️⃣ Fixing the URL params performance penalty [Technical]
Stop downloading the same page multiple times just because of UTM parameters. The "No-Vary-Search" header saves both server load and user time.
👉 calendar.perfplanet.com/2025/fixing-...
2️⃣ Why we should stop talking performance metrics to Business Leaders [Business]
I totally agree with this. Instead of LCP charts, show your boss a video of the website freezing. Emotions and real user experience sell speed better than dry numbers.
👉 calendar.perfplanet.com/2025/why-we-...
1️⃣ How to load CSS (fast) [Technical]
A geeky look at "Compression Dictionaries." Learn how to download only the necessary CSS and fetch the rest with minimal data. This is the future.
👉 calendar.perfplanet.com/2025/how-to-...
7 tips for your #WebPerformance education:
Every December, @stoyan.me publishes the excellent Web Performance Calendar. It is a great collection of insights from the world's top experts. Even in 2026, these articles are a "must-read."
Here is what caught my eye this year (thread). ⤵️
Web performance is about conversions, not just metrics. ⚡
Google measures #CoreWebVitals on real users, not machines. If your site feels slow to them, your business pays the price.
#CoreWebVitals #SiteSpeed
#WebPerf #SEO
Smarty Brands fastest Czech website
The fastest Czech website, according to the PageSpeed.ONE Awards, is built by Smarty Brands. 🏆
Results: pagespeed.cz/en/awards
#WebPerformance
#PageSpeed
The Inconvenient Truth: How Web Performance Case Studies Undermine Our Relationship With Business, by @machal.bsky.social:
https://calendar.perfplanet.com/2025/the-inconvenient-truth-how-web-performance-case-studies-undermine-our-relationship-with-business/
#performance #metrics #economics
100ms ≠ 1%, do not trust the case study from Amazon
Rather have a few high-quality case studies than many low-quality ones. It hurts the whole industry.
My article for #WebPerf Calendar 2025. Thanks @stoyan.me!
calendar.perfplanet.com/2025/the-inc...
AI is great, but…
Today I asked ChatGPT to do a simple data analysis. A year ago, it handled it perfectly.
Now? Errors, inconsistencies, crashes, lost prompts — twice it even crashed my browser tab with a memory leak.
He’s a genius, but sometimes he drinks.
We can finally see in the data how hiring for junior roles has dropped since the arrival of #ChatGPT.
The first chart shows demand for juniors.
The second shows demand for seniors.
The data is from the U.S. @economist.com
What’s your experience?
#SaaS tools probably won’t die.
But building your own data analysis interface inside them no longer makes sense.
Just look at Toggl for example…
Great app, but when it comes to working with data? Mostly inadequate.
When #AI can deliver an analysis in seconds, it’s simply redundant.
Interesting: #AI vs. #ProductManagement 👇
AI generates ideas cheaply and quickly.
But true reasoning is social: it emerges from debate and conflicting perspectives.
Possible direction for AI? Systems that can actually disagree with each other and bring diverse views.
lukew.com/ff/entry.asp...
Luke Wroblewski makes a good point:
AI models aren’t stealing our content.
They behave just like people — reading, watching, learning, synthesizing.
lukew.com/ff/entry.asp...
Radiohead are touring Europe after 7 years.
In Berlin alone, they’ll play 4 shows in a row.
Tickets are sold in phases — each time you have to prove you’re not a scalper, and then it’s a lottery.
Crazy.
(And I didn’t get picked. 😭)
Why is it hard to predict the pace of #AI progress?
Take airplanes, for example, their speed.
From the Wright brothers’ plane to the first Boeing 7 series in the 1960s — half a century of huge progress.
And then half a century of stagnation.
Writing text:
– before AI: 1h
– with AI: 15 min
Meme search:
– before AI: 15 min
– with AI: 1h
#WebPerf audits from #SEO agencies…
We’ve just added case studies to our company's website.
The results of our #WebPerformance work are pretty good. :)
For example, we sped up sites like SIKO and Footshop by more than 2.5×.
You’ll even find a few technical insights in there: pagespeed.cz/en/reference
This guy wants to work at 37signals — so he built a landing page and a pitch deck just for them. Brilliant.
By the way, we hired our newest team member at out company thanks to a similar approach.
Landing your dream job might be easier than you think.
37signals.kawaicheung.io
A real eye-opener for prioritizing #WebPerformance?
Show your client their website on a low-end mobile device.
infrequently.org/2024/01/perf...
What do you think the rise of AI — like AI Overviews in Google — means for the web?
Extinction?
Transformation?
Opportunity?
