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Testing performance on actual device should be mandatory for every project, as it makes so many issues obvious.
The best analouge you can buy for a representative P75 device today are ~$200 Androids from the last year or two, such as the Samsung Galaxy A50 and the Nokia G11.
I’m always left wondering (suspecting the answer with hopeful optimism that my hunch is wrong this time): do these workflow improvements actually…
JPEG XL isn't useless; it is genuinely compelling technology for use cases beyond the Web. I'm just not personally convinced we need it in browsers…
Core Mobile Vitals: Understand how your users feel about your app
if you ask a mobile team “is your app healthy?”, you’ll probably get a 20-minute technical briefing that involves crash rates, ANRs, Apdex scores,…
Mateusz Krzeszowiak
Store Speed and Conversion: What the Data Shows
Speed matters—but it's one of many variables. Our data shows a clear correlation between performance and conversion, though not direct causation.…
The speed of trust: How slow pages hurt your brand
Never underestimate the fragility of trust online. Users are constantly evaluating whether a site feels safe enough to enter personal details and…
Alex Russell 
Zach Leatherman
Gianni Rosato
Tammy Everts