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New Dec 31, 2025
The Curious Case of the Shallow Session SPAs
Buried at the end of this year’s installment of my semi-annual series on network and device reality is a mystery: multiple, independent data sets from the Web Performance community indicate...
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New Dec 31, 2025
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...
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New Dec 31, 2025
Teaching Agents about Performance insights
AI is kinda everywhere! Everyone is shipping AI features or Agents, but few of those systems can reason about the complex reality of performance data. This session is a deep dive story into the...
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New Dec 31, 2025
Chrome DevTools Features I Use All the Time (and Why You Should Too)
Most developers open Chrome DevTools, check a couple of network requests, maybe refresh the page once or twice — and that’s it. I used to do the same. Over time, DevTools became something else...
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New Dec 31, 2025
Open Source RUM with BasicRUM
It’s been a long, busy year but my friend Faisal and I stayed focused on building BasicRUM. After work, we pushed countless commits from a cozy café in Munich. The important news is that...
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New Dec 30, 2025
7 Steps of a Web Performance Journey
This year, Sergey Chernyshev, Eric Goldstein, and Alex Chernyshev – members of the NY Web Performance meetup – decided to collaborate on the future of the UX Speed Calculator tool Sergey...
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New Dec 29, 2025
Third Parties and Single Points of Failure
You’ve heard it many times – third party content can easily cause an otherwise well performing website to become sluggish and slow. And depending on how this content is loaded, it can also...
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New Dec 28, 2025
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...
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New Dec 27, 2025
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....
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New Dec 26, 2025
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...