Hallway Hangout: Performance Improvements for WordPress 6.3

Following up on prior performance related hallway hangouts, @clarkeemily and I will be cohosting an upcoming hallway hangout to discuss happenings for 6.3.

If you’re interested in joining, the Hallway Hangout will happen on 2023-07-27 15:00. a Zoom link will be shared in the #core-performance Slack channel before starting.

At a high level, we’ll go through quick intros (what each person does/focuses on) before diving into WordPress 6.3 performance improvements led by performance leads (@clarkeemily @flixos90) and looking ahead at what can be learned for WordPress 6.4. Here’s a preview from the 6.3 beta 2 post:

Following the incredible performance improvements introduced in 6.2, the release includes more than 170 performance-related updates, including adding defer and async support to the WP Scripts API and fetchpriority support for images. Optimizations were made to block template resolution, image lazy-loading, and the emoji loader, all of which benefit LCP performance. Support for PHP versions 8.0, 8.1, and 8.2 has been improved.

As a reminder, hallway hangouts are meant to be casual and collaborative so come prepared with a kind, curious mind along with any questions or items you want to discuss around this important area of the project, especially since the agenda is intentionally loose to allow for it.

Noting this specifically for folks who have expressed interest previously or who are involved directly in this work cc @hellofromtonya @aristath @oandregal @tweetythierry @desrosj @youknowriad @spacedmonkey @adamsilverstein @mukesh27 @joemcgill @johnbillion.