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Reposted by Weston Ruter

Jimmy Kimmel @jimmykimmel.com · 27d

As I was saying…

Jimmy Kimmel is Back!

YouTube video by Jimmy Kimmel Live

youtu.be

1.7K 8K 36K

Weston Ruter @weston.ruter.net · Sep 11

Thanks for inviting me!

Screenshot shows my blog post: weston.ruter.net/2025/08/27/t...

The Site Speed Frontier with Performance Lab and Beyond - Weston Ruter

Analysis of the LCP impact for optimizations featured by the Performance Lab plugin and proposed for WordPress core. Presented at WCUS 2025.

weston.ruter.net

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Reposted by Weston Ruter

Henri Helvetica 🧑🏾‍🚀🇭🇹 @henrihelvetica.bsky.social · Sep 11

Big thanks to @weston.ruter.net for joining me on the ✨ SPDY STREAM 009 ✨ yesterday. Lots of details were shared about the progress on the #WordPress platform re: performance. This should edited for next week.

image of two developers during live stream. One is wearing a yellow cap. Both arena glasses and a dark top. One screen shows a page being shared that reads: the site speed frontier with performance lab and beyond.

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Weston Ruter @weston.ruter.net · Sep 11

This closely aligns with what I was saying in my recent talk at WordCamp US: just because something is good doesn’t mean it can’t be better!

The Site Speed Frontier with Performance Lab and Beyond - Weston Ruter

Analysis of the LCP impact for optimizations featured by the Performance Lab plugin and proposed for WordPress core. Presented at WCUS 2025.

weston.ruter.net

1

Weston Ruter @weston.ruter.net · Sep 11

I love this new post from Speed Kit. They divide up the 2.5-second “Good” threshold for LCP into two additional thresholds: Instant (300ms) and Fast (1000ms), while the current Good threshold becomes merely “OK”.

Don’t Settle for “Good”: It Is Time for New LCP Thresholds | Speed Kit

We at Speed Kit are now extending Google's LCP thresholds in all our dashboards by adding two additional buckets to show more details for page loads faster than 2.5s.

www.speedkit.com

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Weston Ruter @weston.ruter.net · Sep 10

*Weston ☺️

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Weston Ruter @weston.ruter.net · Sep 9

I'm super excited to see all of this happen on Glisan ASAP! I can't wait for how these changes will improve pedestrian safety, facilitate cycling, and calm traffic to reduce the frequent speeding and racing that happens in these 10 blocks between 82nd and 92nd. And thank you, @pbotinfo.bsky.social!

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Weston Ruter @weston.ruter.net · Sep 3

Full background: weston.ruter.net/2025/05/26/i...

Improve LCP by Deprioritizing Script Modules from the Interactivity API - Weston Ruter

Adding fetchpriority=low to script modules and moving them from the head to the footer can improve LCP by >9%!

weston.ruter.net

Weston Ruter @weston.ruter.net · Sep 3

Just landed in WordPress trunk: scripts and script modules can be registered with a `fetchpriority` arg, and the Interactivity API script modules and comment-reply script use `low` by default. This can improve LCP by ~7% when the LCP element has an image: core.trac.wordpress.org/changeset/60...

Changeset 60704 – WordPress Trac

Blog Tool and Publishing Platform

core.trac.wordpress.org

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Weston Ruter @weston.ruter.net · Aug 27

I've joined @wpengine.com to contribute full time to WordPress core, continuing the performance work I started while at Google:

Joining WP Engine - Weston Ruter

I've joined WP Engine to contribute full time to WordPress core, continuing the performance work I started while at Google.

weston.ruter.net

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Weston Ruter @weston.ruter.net · Aug 27

I just presented “The Site Speed Frontier with Performance Lab and Beyond” at WordCamp US. Shortly before my talk, I published a companion blog post that has 10x the information I had time to share, and I've just added an embed of the livestream: weston.ruter.net/2025/08/27/t... #WCUS

The Site Speed Frontier with Performance Lab and Beyond - Weston Ruter

Analysis of the LCP impact for optimizations featured by the Performance Lab plugin and proposed for WordPress core. Presented at WCUS 2025.

weston.ruter.net

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Weston Ruter @weston.ruter.net · Aug 22

For intra-site navigations, I think speculation rules with moderate eagerness and prerendering is the much easier solution.

Weston Ruter @weston.ruter.net · Aug 22

I'll check it out! Yeah, good point that a PWA can all but eliminate TTFB when using cache-first or stale-while-revalidate, but only for repeat visitors. But there is still the service worker startup cost since you can't use navigation preload.

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Weston Ruter @weston.ruter.net · Aug 22

My blog has reached a web performance milestone: It's now in CrUX for both mobile and desktop (at the origin level), and it passes the CWV assessment for each! But the web performance journey isn't over…

Web Performance Milestone - Weston Ruter

My blog is now passing the CWV assessment on desktop and mobile in CrUX and has 100 in Lighthouse! But the web performance journey isn't over.

weston.ruter.net

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Weston Ruter @weston.ruter.net · Aug 16

I've just made some updates to my Portland picks post for WordPressers coming to my town for #WCUS: weston.ruter.net/2024/09/12/m...

My Portland Picks - Weston Ruter

Since so many of my teammates and colleagues are converging on my hometown of Portland, Oregon for WordCamp US, I've put together a list of some of my favorite things to do which may be helpful for WC...

weston.ruter.net

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Weston Ruter @weston.ruter.net · Aug 10

A script printed any other way (including in event handler attributes) will be blocked from execution since it could have been added due to an XSS exploit. These will appear as errors in the console.

Refused to execute inline script because it violates the following Content Security Policy directive: "script-src 'nonce-9b539cfe47' 'unsafe-inline' 'strict-dynamic' https: http:". Note that 'unsafe-inline' is ignored if either a hash or nonce value is present in the source list.

Weston Ruter @weston.ruter.net · Aug 10

To be compatible, themes and plugins must not print <script> tags directly. Instead, they must use the proper APIs: wp_enqueue_script(), wp_add_inline_script(), wp_localize_script(), wp_print_script_tag(), wp_print_inline_script_tag(), wp_enqueue_script_module() and the like.

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Weston Ruter @weston.ruter.net · Aug 10

I've published a new WordPress security plugin: Strict CSP. It helps mitigate cross-site scripting (XSS) vulnerabilities on the frontend and login screen (but not yet in the WP admin):

Strict CSP

Enforces a Strict Content Security Policy on the frontend and login screen to help mitigate any XSS vulnerabilities.

wordpress.org

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Weston Ruter @weston.ruter.net · Aug 4

¡Qué logro, ¿no?!

AUGUST 4, 2025

My Duolingo Spanish Score is 100!

Weston Ruter @weston.ruter.net · Jul 31

I just wish that the Gemini Code Assist plugin for JetBrains (PhpStorm) also automatically read from this .gemini/codestyle.md instead of requiring manual configuration of the prompt library in settings (i.e. copy the file contents and paste as the rules).

Weston Ruter @weston.ruter.net · Jul 31

I've been enjoying Gemini Code Assist for GitHub. It is a very helpful AI code reviewer! I just learned it supports configuration via a .gemini/ directory, allowing you to provide a style guide. I've put together an initial one for my WordPress plugins: github.com/westonruter/...

Introduce code style for Gemini Code Assist by westonruter · Pull Request #1 · westonruter/wp-plugin-template

I just learned that Gemini Code Assist for GitHub supports a .gemini directory which can be used for configuration. One of these configuration files is a styleguide.md. This PR introduces an initia...

github.com

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Weston Ruter @weston.ruter.net · Jul 30

The fix has also landed in WordPress core for 6.9:

Changeset 60522 – WordPress Trac

Blog Tool and Publishing Platform

core.trac.wordpress.org

Weston Ruter @weston.ruter.net · Jul 30

If you're using Additional CSS (Custom CSS) in the Customizer and have a Block Theme active, you may have noticed that live preview hasn't been working. This will be fixed in the next version of Gutenberg (21.4):

Fix ability to preview Additional CSS changes in the Customizer when using a Block Theme by westonruter · Pull Request #70428 · WordPress/gutenberg

The implementation here is described in https://core.trac.wordpress.org/ticket/63589#comment:23 Instead of re-introducing the separate STYLE tag for the Customizer's Custom CSS in the Customiz...

github.com

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Weston Ruter @weston.ruter.net · Jul 29

Planned performance improvements for WordPress 6.9, including:
• script fetchpriority
• output buffering
• bfcache
• CSS minification/inlining
And more:

Roadmap to 6.9

WordPress 6.9 is scheduled to be released on December 2nd, 2025 with plans for a simplified editing mode in the Site Editor, improvements to template management, block leveling commenting, and more…

make.wordpress.org

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Weston Ruter @weston.ruter.net · Jul 25

Non-cached pages have higher latency so Speculation Rules will be even more helpful. There is also a setting which allows you to opt in for Speculative Loading for the most important user on your site: you! github.com/WordPress/pe...

Add Speculative Loading opt-in for authenticated requests by westonruter · Pull Request #2097 · WordPress/performance

Speculative Loading was omitted from logged-in users per #1157: Prefetching really shines with page caching as the server is able to deliver the content almost instantly with near zero CPU usage w...

github.com

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