🥳 100: Speed Up Critical Assets with Priority Hints

        3 May 2022

🥳 100: Speed Up Critical Assets with Priority Hints

         ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏ ͏

[issue 100]()

#### Editor’s note

If newsletters have birthdays, this is a big one—welcome to the 100th issue of Performance Newsletter! We sent <a class="editor-rtfLink" href="http://createsend.com/t/d-7FC31A9B3342BE20" style='color: #4a6ee0;background: transparent;margin-top: 0pt;margin-bottom: 0pt;border-collapse: collapse;mso-line-height-rule: exactly;font-family: -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol";text-decoration: none;font-weight: normal;margin: 0;padding: 0;mso-effects-shadow-color: #2B2B2B;' target="_blank"><span data-preserver-spaces="true" style="background: transparent;color: #4a6ee0;margin-bottom: 0pt;margin-top: 0pt;border-collapse: collapse;mso-line-height-rule: exactly;">the first mailing</span></a> on June 1, 2016, six years ago. I’d probably laugh if someone told me we’d be doing something so consistently for such a long time, but here we are!

Thank you for reading, no matter if you’ve been here for years, weeks, or days. We hope Performance Newsletter remains a source of knowledge and inspiration for web performance content. We’re always an email away, so we’re all ears if you’ve written something or want to share a suggestion about making it a better resource.

Here’s to another hundred issues and a more equitable web!

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

### [Priority Hints: Influence How Browsers Fetch Resources](https://calibreapp.com/blog/priority-hints)

[Karolina Szczur](https://twitter.com/fox)

Priority Hints is a new way to prioritise critical assets with a single HTML attribute (or the JavaScript Fetch API). Learn how you could use it to improve web performance!

### [Images Tooling Report](https://images.tooling.report/)

[Patrick Kettner](https://twitter.com/patrickkettner)

Read this report to compare selected image tools (CDNs, website builders and plugins) and services based on web performance and editorial features.

### [Optimizing LCP using Signed Exchanges](https://developer.chrome.com/blog/optimizing-lcp-using-signed-exchanges/)

[Devin Mullins](https://twitter.com/twifkak)

It’s possible to make sites that require no network on the critical path to rendering the page (when prefetched)! Learn what Signed exchanges (SXGs) are and how you can use them to improve speed.

### [Hydration is Pure Overhead](https://www.builder.io/blog/hydration-is-pure-overhead)

[Misko Hevery](https://twitter.com/mhevery)

Hydration has been a popular solution to add interactivity to server-rendered HTML, but not without performance issues. Enter resumability—an alternative approach with less overhead and duplication.

### [Can you use a WebP file as an Open Graph Protocol image?](https://www.ctrl.blog/entry/webp-ogp.html)

[Daniel Aleksandersen](https://twitter.com/DaAleksandersen)

It might be frustrating when you leap to new image formats but realise widespread support isn’t quite there. I love pieces about not-so-frequently discussed aspects of performance, and this is one of them!

### [Managing Third Party Scripts](https://www.jameshill.dev/articles/managing-third-party-scripts-performance/)

[James Hill](https://twitter.com/jahilldev)

Most third parties run on the main thread and have access to everything your application does. How often does your team ask questions about the use and impact of third parties?

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.

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.

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