Issue 17—sustainable technology, how healthy is the Internet, Chrome reduces parse and compile by almost 40% and more!

        8 May 2018

[](https://perf.email/)
#### PerformanceNewsletter

#### Issue 17

#### Editor’s Note

You might have noticed a few changes. Perf.email was always published based on our experience in the performance field and work fueling [Calibre](https://calibreapp.com/).
We’re now bringing Performance Newsletter under the Calibre umbrella, but worry not—nothing else is changing! We hope that this newsletter will continue being a source of knowledge, inspiration and thoughtful pieces on user experience, performance and accessibility.

—Karolina & Ben

#### article

## Towards sustainable design and technology

The tech industry is slowly starting to recognise its footprint on the planet. Did you know that if the Web was a country, it’d be on track to become the fourth largest CO₂emitter on the planet, following the US, China and India? 😱
#### [the rise of green ux →](https://www.fastcodesign.com/90167803/the-rise-of-green-ux)

#### open source

## Prefetching lands in Webpack

Preloading resources can be incredibly useful to avoid waterfall-like fetching and visibly slow loading. Resource hints can now be baked into your Webpack configuration!

#### [ in webpack →](https://medium.com/webpack/link-rel-prefetch-preload-in-webpack-51a52358f84c)

#### article

## How healthy is the Internet?

A fascinating report on the human experience of the Internet in which Mozilla tackles the most crucial areas of user experience and thriving on the digital platform. Available in PDF and online with wonderful visualisations.

#### [Mozilla Internet Health Report 2018 →](https://internethealthreport.org/2018/)

#### open source

## Extract data from Chrome User Experience Report

Thanks to Rick Viscomi, it’s now easier to extract information from the massive dataset of CrUX. If you’ve found BigQuery intimidating, use of one of the recipes on Github.

#### [CrUX Cookbook →](https://github.com/rviscomi/crux-cookbook)

#### browsers

## Chrome greatly reduces JavaScript parse & compile

Updates to V8 engine powering Chrome reduce parse and compile times for JavaScript by 20-40% on initial load. This is fantastic news for anyone building JavaScript-heavy apps and battling code execution performance bottlenecks.

#### [V8: Improved code caching →](https://v8project.blogspot.com.au/2018/04/improved-code-caching.html)

#### new in calibre

## Automate performance with CLI

Calibre CLI, a crucial part of a comprehensive performance system, is now live! Retrieve performance metrics, run snapshots post-deployment, integrate with continuous integration tooling, share test results publicly and more!

Not sure where to start? [The CLI is open source](https://github.com/calibreapp/cli), and we’ve written Node.js and bash scripting examples. 💐
#### [introducing calibre ](https://building.calibreapp.com/introducing-calibre-cli-c88d3b13d97e)[cli](https://building.calibreapp.com/introducing-calibre-cli-c88d3b13d97e)[ →](https://building.calibreapp.com/introducing-calibre-cli-c88d3b13d97e)

#### Spread the word about perf.email

We’d love to see more people reading
                              [perf.email](https://perf.email/); if you’d like to help—forward this email to a friend, tweet, or shout from a rooftop.
                                It goes a long way. ✌🏻

#### Brought to you by

                              ♠ [Calibre](https://calibreapp.com/). Make the web fast for everyone.

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