Performance Chat Summary: 23 January 2024

Table of Contents

Announcements

Welcome to our new members of #core-performance
The Performance Team have released 2 new plugins this week
- Auto-sizes for lazy-loaded images
- Speculation rules
The 2024 performance roadmap has now been published

Link to roadmap projects and link to the GitHub project board
Contributors: @joemcgill @swissspidy @thekt12 @mukesh27 @pereirinha
Projects from the 2024 roadmap:
- Internationalization Performance
- Improve template loading

Notes from today’s call:

@thekt12 https://github.com/WordPress/wordpress-develop/pull/5915 – Wont Fix. Current options will expose other variables references leading to more complex issue. I agree with @spacedmonkey https://github.com/WordPress/gutenberg/pull/58072#issuecomment-1904484863 , this is better way to go, to modify and remove variations

Notes from today’s call:

Link to roadmap project and link to the GitHub project board
Contributors: @mukesh27 @flixos90 @westonruter
Projects from the 2024 roadmap:
- INP opportunities research
- Interactivity API
- Speculative prerendering

Notes from today’s call:

Link to roadmap projects and link to the GitHub project board
Contributors: @flixos90 @adamsilverstein @joemcgill @pereirinha @westonruter
Projects from the 2024 roadmap:
- Image loading optimization
- API to facilitate more accurate “sizes” attribute
- Land AVIF support in core
- Client side image compression

Notes from today’s call:

@westonruter For Image Loading Optimization, the PR to preload the background-image for the LCP element just needs one more review to merge. Again, I found this change to reduce LCP-TTFB by ~9% when, for example, the LCP elemment is a Group block with a background image or a Cover block with parallax. Otherwise, I’ve been working with @thelovekesh on eliminating loading the web-vitals library from unpkg.
@adamsilverstein The PR to land AVIF is ready for testing; at this point I am waiting for support to land in Edge stable before committing, not sure that will in time for beta cutoff though
@swissspidy For client side image compression I’m currently working on ways to make the performance impact more measurable and documenting that. In the meantime, my Media Experiments plugin can now be tested on WordPress Playground to familiarize oneself with how seamless it all is.
@joemcgill As mentioned earlier, the experimental plugin for supporting auto-sizes is now available. I’m tracking an issue that is effecting WP galleries when this is in use. Additional testing and feedback of this feature (requires Chrome 121+) would be appreciated.

Link to roadmap projects and link to the GitHub project board
Contributors: @adamsilverstein @joemcgill @mukesh27 @swissspidy @flixos90
Projects from the 2024 roadmap:
- Stabilized automated performance testing metrics
- Improve core automated performance tests

Notes from today’s call:

Link to roadmap projects and link to the GitHub repo for Plugin Checker
Contributors: @mukesh27 @swissspidy
Projects from the 2024 roadmap:
- Creating standalone plugins milestone 2
- Plugin checker
- Reusable testing environment

Notes from today’s call:

@mukesh27 For Creating standalone plugins milestone 2b:
- Introduce plugins folder for standalone plugins – merged
- Working on test suite update so it cover plugins folder
@mukesh27 For Plugin Check, nothing more, just been offering support by conducting code reviews for open PRs