Performance Chat Summary: 8 September 2026

The full chat log is available beginning here on Slack.

WordPress Performance Trac tickets

• @spacedmonkey shared ongoing work to improve query caches and requested more eyes on the work. The idea came from a chat with @peterwilsoncc on the RTC ticket #65487, and @spacedmonkey said the idea has legs. PR #12220 has some test coverage, and all other query caches introduced already have test coverage. More tests could always be added, but testing remains tricky because the change does not introduce new functionality. @spacedmonkey requested feedback from @westonruter, @mukesh27, and @adamsilverstein.
• @westonruter said PR #13084 for elimination of script/style concatenation in favor of prefetch remains at the top of performance radar. No chance to pick up the work again since WCUS, but the PR is believed to be almost ready for merge.
• @b1ink0 is reviewing and testing the view transition PR #11912. @westonruter responded that should make admin navigation feel much better.

Our next chat will be held on Tuesday, September 22, 2026 at 16:00 UTC in the #core-performance channel in Slack.

#core-performance, #hosting, #performance, #performance-chat, #summary