Microsoft Edge Team
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JavaScript must be downloaded, then run through a JIT compiler (even if you don’t use it), and then executed, and all this must be done before any of the JavaScript can start rendering the UI. This introduces a lot of delay before users can see the UI, especially on low-end devices.
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…
Zach Leatherman
Gianni Rosato
Tammy Everts