#### case study ## Understand the user through the lens of speed [Darren Hebner](https://twitter.com/darrenhebner) explains how Shopify implemented numerous performance improvements to their admin interface—from techniques for developers to overarching approaches and strategies for managers and leads, together forming a holistic approach to speed. []()[Want to Improve UI Performance? Start by Understanding Your User →](https://engineering.shopify.com/blogs/engineering/improve-ui-performance-understanding-your-user)

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#### article ## Decipher your WebPageTest results Performance tools are sophisticated, and without a deep understanding of not only terminology but ways to present performance data, it becomes nearly impossible. Here, [Matt Hobbs](https://twitter.com/TheRealNooshu) explains WebPageTest’s waterfall chart in the level of detail that will make you confident in conducting your performance audits. []()[How to read a Web Page Test waterfall chart →](https://nooshu.github.io/blog/2019/10/02/how-to-read-a-wpt-waterfall-chart/)

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#### article ## Learn about the state of video [Doug Sillars](https://dougsillars.com/2019/09/16/state-of-the-web-video-playback-metrics/) offers a deep-dive into the state of video on the web, through the lens of performance. Learn what fascinating characteristics lead to slow startup and video stalling, resulting in poor user experience. For example, did you know that nearly 40% of videos on mobile stalled at least once? []()[State of the Web: Video Playback Metrics →](https://dougsillars.com/2019/09/16/state-of-the-web-video-playback-metrics/)

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#### article ## Get to know HTTP/3 I know, I know. Not that long ago we were all raving about HTTP2 and here we are, with few vendors such as Google, Firefox and Cloudflare rolling out HTTP3 support. Check out this article by [Rustam Lalkaka](https://twitter.com/lalkaka) and Alessandro Ghedini to learn what speed improvements HTTP3 will bring. []()[HTTP/3: the past, the present, and the future →](https://blog.cloudflare.com/http3-the-past-present-and-future/)

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#### article ## Know the context behind performance metrics While usually we exclusively feature new content, some articles weather the test of time. [Chris Zacharias](https://twitter.com/zacman85) explains how there’s always nuance and context behind performance data and not fully understanding it will cause you trouble. []()[Page Weight Matters →](https://blog.chriszacharias.com/page-weight-matters)

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