͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏
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#### Editor’s note
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Variability in web performance is complex, as many factors affect it. One of the challenges of variability is that people often don’t expect it and may need help understanding why it occurs. This can lead to frustration and confusion, especially if the performance issues are intermittent or difficult to reproduce.
We must normalize variability. But what’s even more critical is clearly highlighting why metrics might fluctuate in the first place. If people **don’t** believe the tools and results, how can we expect them to rally behind web performance?
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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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### [SEO content has peaked; it’s time to focus on performance](https://calibreapp.com/blog/performance-competitive-advantage)
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[Karolina Szczur](https://thefox.is/)
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Easily discoverable, good content is one thing. Accessing it fast and reading with a pleasant experience is another. Are you missing out by not optimising content UX?
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### [Optimizing web fonts in Next.js 13](https://www.lydiahallie.io/blog/optimizing-webfonts-in-nextjs-13)
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[Lydia Hallie](https://www.lydiahallie.io/)
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Text shifts are jarring and confusing. Learn how to minimise the Flash Of Invisible Text (FOIT) and Flash Of Unstyled Text (FOUT) with the **@next/font **module.
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### [Fast is good, instant is better!](https://calendar.perfplanet.com/2022/fast-is-good-instant-is-better/)
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[Barry Pollard](https://www.tunetheweb.com/)
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Instant page load is the web performance dream. Find out about available strategies that get us closer, such as bfcache and the Speculation Rules API!
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### [Variability isn’t the problem](https://timkadlec.com/remembers/2022-12-08-variability-isnt-the-problem/)
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[Tim Kadlec](https://timkadlec.com/)
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Variability is one of the most discussed issues in web performance. Is it in itself a problem or the confusion it creates?
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### [What goes into making a new Web Vital metric](https://calendar.perfplanet.com/2022/making-a-new-web-vital-metric/)
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[Annie Sullivan](https://anniesullie.com/)
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Have you ever thought about how new performance metrics come to life? Find out from Annie, who currently leads performance metric development on Chrome.
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# Courses, Talks & Podcasts
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### [CSS runtime performance](https://nolanlawson.github.io/css-talk-2022/#1)
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[Nolan Lawson](https://nolanlawson.com/)
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CSS performance doesn’t get as much attention as JavaScript. Explore what CSS parts are optimised by the browsers and what web developers can do to speed it up further.
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