Core Performance Team Update – November 30, 2022

Performance Lab

Performance Lab plugin updates are released monthly on the third Monday of the month.

November’s release, v1.7.0, changed the default quality value for all MIME types (including WebP) to 82, which is test in preparation for possibly changing this value for WebP images in coreCore Core is the set of software required to run WordPress. The Core Development Team builds WordPress. in #54536. In addition, it included several image-related bug fixes.

Proposals and Discussion

Performance Team chats are held weekly on Tuesdays; check for current time.

@aristath has continued to refine the proposed SQLite module as a betaBeta A pre-release of software that is given out to a large group of users to trial under real conditions. Beta versions have gone through alpha testing in-house and are generally fairly close in look, feel and function to the final product; however, design changes often occur as part of the process. test for possibly implementing SQLite into core, and it’s now pending final review for planned release in Performance Lab v1.8.0 in December. We’ll publish a blog post about it once available to invite testers.

A new experimental fetchpriority module is also planned for release in v1.8.0. This will add the fetchpriority attribute of high to the LCP (or first large) image on a page to improve the page’s LCP.

@flixos90’s work to add the Server-Timing API into the plugin’s infrastructure is nearing completion for a final review and could be considered for inclusion in 1.8.0.


In addition to Performance Lab, the Performance Team also works on performance-related tickets in core and holds a monthly Bug Bash on the first Wednesday of every month; check for current time.

The team is working on several priority tickets for 6.2, including #54221, #55942, #22951, #56350, and #16502

In addition, @spacedmonkey, with support from @flixos90, is working with members of the GutenbergGutenberg The Gutenberg project is the new Editor Interface for WordPress. The editor improves the process and experience of creating new content, making writing rich content much simpler. It uses ‘blocks’ to add richness rather than shortcodes, custom HTML etc. team on several improvements to the theme.json APIs.