Description When we looked into JPEG XL, I asked developers why they were interested in the format, and the most common answer was "progressive rendering". This is now working in Firefox and Chrome...

Fifteen years ago I helped popularise the meta viewport width=device-width,initial-scale=1. Today I found out the second bit is no longer necessary. A retrospective.

Take a quick glance at this PHP code: $stuff = (string) $things ?? 'nothing'; var_dump( $stuff ); If this is all the code you have, then $things does not exist,…

Unattributed Navigation Overhead exposes the part of Time to First Byte that Navigation Timing cannot explain, including hidden cross-origin redirects.

Netflix has an interesting show about the concept of infinity: A Trip to Infinity ( 2022 ). Worth it for the Infinite Hotel section alone.

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YouTube video by TheButtonLady

Robin Marx has been asking me for a Compression Dictionary Transport (RFC 9842) test tool for a long time (since well before AI was actually useful for this...

Core Web Vitals data from ten leading online retailers reveals that "good" for Google may not be good enough for your users or your business.

With 2020 behind us, at least chronologically, there is a strong push to get the covid-19 pandemic under control through vaccinations. As has been widely reported, the initial rate of…

When you let the kids wander the house with a handful of googly eyes and they find an Amazon box.

Took them awhile to use up the box of googly eyes. Perhaps this is a new market segment – smart speakers with faces on them.

The Google Network Infrastructure page describes their various data center locations. What really stood out was their “Edge Nodes (Google Global Cache, or GGC)” map: Compare that to the map…

The approach of starting with the most basic design and gradually adding features is a great way to demonstrate how this works. That is true of many things.

Today a mob of Donald Trump supporters, and the Republican Party, attacked and invaded the United States Capitol building. My heart is low as a I try to process what…

My rough math for number of vaccines Utah needs to be giving each day was 15,000. Unfortunately https://coronavirus-dashboard.utah.gov/#vaccines only provides the total number of vaccines that have been given. While…

You have likely heard of “The Golden Rule”, which is usually described as: treat other people the way that you want to be treated. The New Testament version comes from…

At WordPress.com, we believe short thoughts deserve a real home. Today we’re introducing a new theme built for quick posts, replies, and reblogs: the kind of writing that lives somewhere betw…

Built-in web server

I’ve been wanting to build a 100% client-based waterfall tool for a long time. Something with a much more modern rendering engine and UI than WebPageTest’s s...

If your design system can only apply `loading=lazy` or `fetchpriority=high` blindly, it may be safer not to apply them at all.

Automattic’s products—WordPress.com, WooCommerce, Beeper, Tumblr, Jetpack, and more—serve tens of billions of page views every month from data centers around the world. The PerfOps team exists to make...

PHP Packaging