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Site-Speed Topography

CSS Wizardry

When first working on a new site-speed engagement, you need to work out quickly where the slowdowns, blindspots, and inefficiencies lie. Of course, it’s a little more complex than that, but for this exercise it’s an incredibly reliable proxy. Now, let’s move on to gaps between First Contentful Paint and Speed Index.

Speed 337
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Measuring Network Performance in Mobile Safari

CSS Wizardry

This, of course, is exacerbated by the new Vitals announcement, whereby data from the Chrome User eXperience Report will be used to aid and influence rankings. Same page, same connection speed, same locale, same release year, different devices. Network Link Conditioner. Next, open Chrome and its own Network DevTools panel.

Network 296
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Netflix Android and iOS Studio Apps?—?now powered by Kotlin Multiplatform

The Netflix TechBlog

For these reasons, as a small engineering team, we’ve found that optimizing for reliability and speed of product delivery is required for us to serve our evolving customers’ needs successfully. The high likelihood of unreliable network connectivity led us to lean into mobile solutions for robust client side persistence and offline support.

Mobile 279
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The psychology of site speed and human happiness

Speed Curve

In the fourteen years that I've been working in the web performance industry, I've done a LOT of research, writing, and speaking about the psychology of page speed – in other words, why we crave fast, seamless online experiences. In fairness, that was in the early 2000s, and site speed was barely on anyone's radar.

Speed 138
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Performance Hero: Annie Sullivan

Speed Curve

Annie leads the Chrome Speed Metrics team at Google, which has arguably had the most significant impact on web performance of the past decade. It's really important to acknowledge that none of this would have been possible without the great work from Annie and her small-but-mighty Speed Metrics team at Google. Nice job, everyone!

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In Defence of DOM­Content­Loaded

CSS Wizardry

I never thought I’d write an article in defence of DOMContentLoaded , but here it is… For many, many years now, performance engineers have been making a concerted effort to move away from technical metrics such as Load , and toward more user-facing, UX metrics such as Speed Index or Largest Contentful Paint. log ( window. performance.

Metrics 337
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Introducing Page Speed Benchmarks – a new resource for the performance community

Speed Curve

Page Speed Benchmarks is an interactive dashboard that lets you explore and compare web performance data for leading websites across several industries – from retail to media. With Page Speed Benchmarks, you can do things like: See what the different metrics actually mean in terms of user-perceived performance.