We keep talking about how there is no singular number accurately portraying user experience. While those statements often tie to the Performance Score, there’s even a more significant discussion we should be having.
**User experience is a spectrum. Web performance is a distribution.** There are no two same experiences, same as there are no two identical people in the same location, on the same device, in the same network. Expecting a single number to be able to provide a rating or something to aspire to is a flawed assumption.
Don’t build for *the* user. Build for *all* users.
Karolina
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# Articles
### [How Fast Should Your Site Load?](https://medium.com/firebase-developers/how-fast-should-your-site-load-cfb14be48e8b)
[David East](https://twitter.com/_davideast)
We look to find exact numbers to aspire to and failing to recognise user experience is a diverse spectrum. Know how important the realisation that performance is a distribution can be.
### [Browser Back/Forward Caches and their Benefit to Web Performance](https://paulcalvano.com/2020-08-03-browser-backforward-caches-and-their-benefit-to-web-performance/)
[Paul Calvano](https://twitter.com/paulcalvano)
Navigating the web isn’t limited to only loading a page. Learn what effects on speed Reloads and Back/Forward operations can have.
### [radEventListener: a Tale of Client-side Framework Performance](https://css-tricks.com/radeventlistener-a-tale-of-client-side-framework-performance/)
[Jeremy Wagner](https://twitter.com/malchata)
Always use the *right* tools for the job that won’t introduce detrimental effects on user experience. Discover how popular frameworks’ startup and hydration time affects performance.
# Case Studies
### [Investigating the Correlation between Performance Scores and Energy Consumption of Mobile Web Apps](https://www.researchgate.net/publication/341123776_Investigating_the_Correlation_between_Performance_Scores_and_Energy_Consumption_of_Mobile_Web_Apps)
Kwame Chan-Jong-Chu, Tanjina Islam and 6 more authors
This is not the first time excellent performance is linked to energy efficiency. Apps with low Performance Scores and high runtime readings consume much more energy than others.
# Tools
### [Optimize Images with a GitHub Action](https://css-tricks.com/optimize-images-with-a-github-action/)
[Chris Coyier](https://twitter.com/chriscoyier)
Optimising imagery should never be a manual job. Learn how to automatically optimise visuals in your repositories and never ship unnecessarily big images to production.
Here’s our monthly roundup of what was released in July: Snapshot failure notifications, choosing deployment providers in Pull Request Reviews and more.
This email is brought to you by the team at [Calibre](https://calibreapp.com). Our performance monitoring platform helps you deliver stellar user experiences to everyone.
Performance Newsletter is sent from the traditional lands of the Wurundjeri people of the Kulin nation. We acknowledge that sovereignty was never ceded and pay respects to the Elders past, present and emerging.
