Aditya Dhade 6:38 pm on September 23, 2025
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Performance Chat Summary: 23 September 2025

The full chat log is available beginning here on Slack.

WordPress Performance TracTrac An open source project by Edgewall Software that serves as a bug tracker and project management tool for WordPress. tickets

  • @westonruter shared that PR #8412 has tests added and is ready for review, though he still needs to update the description and remove the draft status.
  • @westonruter enquired about PR #9867, which enables printing script modules in the footer.
    • @b1ink0 added that work is currently underway to implement sorting behavior for script modules and their dependencies.
  • @westonruter enquired about coreCore Core is the set of software required to run WordPress. The Core Development Team builds WordPress. milestone #63012 regarding theme CSSCSS Cascading Style Sheets. minification.
    • @b1ink0 mentioned having a POC (minification only for blockBlock Block is the abstract term used to describe units of markup that, composed together, form the content or layout of a webpage using the WordPress editor. The idea combines concepts of what in the past may have achieved with shortcodes, custom HTML, and embed discovery into a single consistent API and user experience. themes) to partially address #63012 and is working with @shyamgadde on a POC addressing the remaining points, with plans to raise PRs in the coming week.
  • @westonruter mentioned PR #9770 to iterate on fetchpriority for script modules, to allow enqueued script modules to influence the priority of dependencies (or vice versa, which is not yet totally clear).

Performance Lab PluginPlugin A plugin is a piece of software containing a group of functions that can be added to a WordPress website. They can extend functionality or add new features to your WordPress websites. WordPress plugins are written in the PHP programming language and integrate seamlessly with WordPress. These can be free in the WordPress.org Plugin Directory https://wordpress.org/plugins/ or can be cost-based plugin from a third-party (and other performance plugins)

Open Floor

  • @westonruter shared that there may be a blockerblocker A bug which is so severe that it blocks a release. preventing ticketticket Created for both bug reports and feature development on the bug tracker. #63636 from being a good candidate for WordPress 6.9. The issue relates to a bugbug A bug is an error or unexpected result. Performance improvements, code optimization, and are considered enhancements, not defects. After feature freeze, only bugs are dealt with, with regressions (adverse changes from the previous version) being the highest priority. in Chrome where sending the Clear-Site-Data headerHeader The header of your site is typically the first thing people will experience. The masthead or header art located across the top of your page is part of the look and feel of your website. It can influence a visitor’s opinion about your content and you/ your organization’s brand. It may also look different on different screen sizes. such as during logout can slow down page performance. While this approach is preferable to using pageshow to invalidate the bfcache, the Chrome bug may require postponing the feature to 7.0.
  • @khoipro suggested adding a filterFilter Filters are one of the two types of Hooks https://codex.wordpress.org/Plugin_API/Hooks. They provide a way for functions to modify data of other functions. They are the counterpart to Actions. Unlike Actions, filters are meant to work in an isolated manner, and should never have side effects such as affecting global variables and output. to exclude certain taxonomies from slow term-count queries in large projects.
    • @johnbillion noted that while the suggestion didn’t seem directly related, two recent fixes in WordPress 6.9 have already reduced unnecessary term recounting #42522 and #63562.

Our next chat will be held on Tuesday, October 7, 2025 at 15:00 UTC in the #core-performance channel in Slack.

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