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10 May 2023

⚡ 126: Get more Core Web Vitals data

͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏
 
Performance Newsletter
[issue 126]()
 
#### Editor’s note
 

In my work, I often elaborate on different reasons for investing in web performance. Frequently, this reasoning is business-driven, which I understand as a business owner and struggle with as an individual. Focusing on new initiatives (often connected to purchasing new software licenses) can be a tough sell, even if you have strong advocates for the case.
 
Personally, I view performance as an ethical and justice-driven choice. A fast web ensures enhanced accessibility, inclusion and lowers carbon emissions, as Jeremy points out in an article featured below. When I talk about speed, I always hope it’s the reasoning of a more welcoming web that will convince decision makers.
 
When advocating for web performance, let’s focus more on human than business impact.

 
Karolina
 
 
 
 
#### What’s Performance newsletter?
 

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]).

 
 
 
# Articles  
 
Web Vitals Extension new console logging showing LCP elements and sub-parts
 
### [Using the Web Vitals extension to debug Core Web Vitals issues](https://web.dev/debug-cwvs-with-web-vitals-extension/)
 
[Barry Pollard](https://www.tunetheweb.com/), [Michal Mocny](https://github.com/mmocny), [Rick Viscomi](https://github.com/rviscomi) & [Brendan Kenny](https://github.com/brendankenny)
If you’re using the Web Vitals library, you can now obtain more granular timings for Largest Contentful Paint, Cumulative Layout Shift, First Input Delay and Interaction to Next Paint.
 
A person in a wheelchair working outside on a garden bed with vegetables
 
### [5 best practices to sustainably improve Core Web Vitals](https://calibreapp.com/blog/improve-core-web-vitals)
 
[Ben Schwarz](https://germanforblack.com/)
Learn targeted practices on improving Core Web Vitals metrics and how to sustainably keep them in good ranges once they are improved.
 
### [The intersectionality of web performance](https://adactio.com/journal/20154)
 
[Jeremy Keith](https://adactio.com/)
The positive impact of good web performance is vast. So, why do we default to highlighting business benefits?
 
 
 
# Tools  
 
Demonstration of an image of a cat and the BPP results
 
### [Image bits per pixel calculator](https://bpp-calculator.netlify.app/)
 
[Tim Kadlec](https://timkadlec.com/)
When calculating Largest Contentful Paint, Chrome will ignore images with low content relative to their size. With this tool, you can analyse your images in terms of bits per pixel.
 
 
 
# Courses, Talks & Podcasts  
 
Slide of a presentation listing techniques and tools for better performance in Angular
 
### [Performance at scale](https://www.youtube.com/watch?v=hznU8Xx_Mqg&ab_channel=AngularTinyConf)
 
[Michael Hladky](https://push-based.io/)

Get hands-on with Chrome, Angular DevTools and tools such as NgOptimisedImage, Zone Flags and Virtual Scrolling to learn how to achieve best web performance.

 
Chrome browser window showing side-by-side view of a website and its Lighthouse audit
 
### [Live audit of Wordpress website](https://www.youtube.com/watch?v=kziMKxuUJjo&ab_channel=DanRamos)
 
[Dan Ramos](https://highcountrydigital.io)
In this performance audit walkthrough, you will learn how to diagnose common performance issues in WordPress, how hosting can affect page speed and more.
 
 
Calibre
 
This email is brought to you by the team at [Calibre](https://calibreapp.com). We automate web performance testing, reporting and alerting, so you don’t have to.
 
 

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