͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏
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#### Editor’s note
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Often, we need to quantify the possible positive outcomes of web performance work. What happens if we cannot estimate the results? Or what if there are no apparent gains? Is it not worth it?
In a data-driven ecosystem that focuses on yielding positive economic outcomes, it becomes harder to concentrate on anything else. But, there still might be benefits: better codebase health or preventing future speed liabilities, to name a few.
Is 2ms as impressive as 200ms? Probably not, but if it’s trivial to fix, why not? The wins have a compounding effect. While we love to quantify, we should make room for what escapes statistics.
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Karolina
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#### What’s Performance newsletter?
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Performance Newsletter is a fortnightly mailing by [Calibre](https://calibreapp.com), featuring web performance tools, talks and resources.
Don’t worry—we don’t spam. If you’d like to leave, [unsubscribe]() at any time. Suggest content [here](mailto:[email protected]).
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# Articles
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### [Memory leaks: the forgotten side of web performance](https://nolanlawson.com/2022/01/05/memory-leaks-the-forgotten-side-of-web-performance/)
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[Nolan Lawson](https://github.com/nolanlawson)
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We don’t often talk about memory leaks in a web performance context. They can be hard to diagnose and often invisible to the end-user. How to decide if they’re worth our attention?
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### [Page Visibility: If a tree falls in the forest…](https://calendar.perfplanet.com/2021/page-visibility-if-a-tree-falls-in-the-forest/)
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[Paul Calvano](https://twitter.com/paulcalvano)
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The Page Visibility API can help developers be more mindful about making runtime decisions by surfacing whether a page is currently visible to visitors or not. Find out why and how to fine-tune experiences based on visibility state!
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### [Measure web performance with Navigation Timing API](https://blog.shimin.io/measure-web-performance-with-navigation-timing-api/)
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[Shimin Zhang](https://twitter.com/ItsTrueInTheory)
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Did you know you could use the Navigation Timing Web API to monitor page speed? Here’s what you can measure and how to get started.
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### [Website performance and the planet](https://blog.webpagetest.org/posts/website-performance-and-the-planet/)
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[Fershad Irani](https://fershad.com/)
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Web performance ties to the carbon footprint. We now have more tools to evaluate our minimum impact on the environment. Learn how to start measuring and optimising.
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# Case Studies
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### [How The Economic Times passed Core Web Vitals thresholds and achieved an overall 43% better bounce rate](https://web.dev/economic-times-cwv/)
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[Anshu Sharma](https://www.linkedin.com/in/anshusharma1983/?originalSubdomain=in), [Sumit Gugnani](https://www.linkedin.com/in/sumitgugnani/?originalSubdomain=in) & [Prashant Mishra](https://github.com/prash-mi)
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Find out what web performance improvements contributed to big Largest Contentful Paint and Cumulative Layout Shift wins for The Economic Times.
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# Talks & Podcasts
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### [alphalist Podcast #43: How to Optimise your Web Performance for Speed](https://alphalist.com/podcast/43-ilya-grigorik-principal-engineer-at-shopify)
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[Tobias Schlottke](https://twitter.com/Tobsch) & [Ilya Grigorik](https://twitter.com/igrigorik)
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Listen to Ilya talk about what every CTO needs to know how mobile networks operate before building anything mobile, how to use perceptual latency to your advantage and more web performance tips!
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