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Web Performance

All things speed and scalability on the web.

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My Go tests never executed a line of the JavaScript they were testing

My Go tests never executed a line of the JavaScript they were testing

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13 min read
The Callback That Kept Rendering Data From Twenty Minutes Ago

The Callback That Kept Rendering Data From Twenty Minutes Ago

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7 min read
How I Actually Make WordPress Sites Fast (Not the Usual 'Install a Cache Plugin' Advice)

How I Actually Make WordPress Sites Fast (Not the Usual 'Install a Cache Plugin' Advice)

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10 min read
Lighthouse says 86. Run it again: 91. Building a free local console for scores you can defend

Lighthouse says 86. Run it again: 91. Building a free local console for scores you can defend

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8 min read
I Went Looking for Why Lenis Beat Locomotive Scroll. The Real Story Surprised Me.

I Went Looking for Why Lenis Beat Locomotive Scroll. The Real Story Surprised Me.

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5 min read
Why I Built an Image Converter That Never Touches a Server

Why I Built an Image Converter That Never Touches a Server

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2 min read
"That library will hurt performance" is not a number

"That library will hurt performance" is not a number

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7 min read
Am analizat 100 de site-uri ale afacerilor locale din România. Iată ce am găsit

Am analizat 100 de site-uri ale afacerilor locale din România. Iată ce am găsit

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5 min read
Why Your Shopify Store Is Slow (And How to Fix It in 2026)

Why Your Shopify Store Is Slow (And How to Fix It in 2026)

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3 min read
No one measured AI API latency and uptime independently across regions — so I built it. 38 days and 2M probes in, here's what the data shows

No one measured AI API latency and uptime independently across regions — so I built it. 38 days and 2M probes in, here's what the data shows

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3 min read
How We Cut Load Time in Half for a Small Fashion Storefront (Lessons from a Real Project)

How We Cut Load Time in Half for a Small Fashion Storefront (Lessons from a Real Project)

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2 min read
I Used Bunny Storage Behind Nginx for Two Months. The Cache Was Fast, the Cold Path Wasn't

I Used Bunny Storage Behind Nginx for Two Months. The Cache Was Fast, the Cold Path Wasn't

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18 min read
A Gutenberg block that uses the Interactivity API — with no render callback and no framework on the front end

A Gutenberg block that uses the Interactivity API — with no render callback and no framework on the front end

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5 min read
I Raised My WebP AVIF SSIMULACRA2 Target to 65. The Encoder Still Passed at 60

I Raised My WebP AVIF SSIMULACRA2 Target to 65. The Encoder Still Passed at 60

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11 min read
iOS Safari can't decode your .mov, and the reason is 2 bytes deep in the container

iOS Safari can't decode your .mov, and the reason is 2 bytes deep in the container

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5 min read
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