Performance Chat Summary: 27 February 2024

Meeting agenda here and the full chat log is available beginning here on Slack.


  • Welcome to our new members of #core-performance
  • WordPress 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. 3 is today
  • Discussion around any WordPress 6.5 tickets [link]
    • Dev notesdev note Each important change in WordPress Core is documented in a developers note, (usually called dev note). Good dev notes generally include a description of the change, the decision that led to this change, and a description of how developers are supposed to work with that change. Dev notes are published on Make/Core blog during the beta phase of WordPress release cycle. Publishing dev notes is particularly important when plugin/theme authors and WordPress developers need to be aware of those changes.In general, all dev notes are compiled into a Field Guide at the beginning of the release candidate phase. for this release were discussed
    • Please check for progress on all dev notes

Priority Projects

Server Response Time

Notes from today’s meeting:

  • @joemcgill #59532 was fixed last week and some unit testunit test Code written to test a small piece of code or functionality within a larger application. Everything from themes to WordPress core have a series of unit tests. Also see regression. improvements were added thanks to @thekt12
  • @thekt12 Working on implementing caching using transient for non-persistant cache website #59719 I have drafted an initial PR for just 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. pattern  PR –
  • @joemcgill The past couple weeks, I’ve been mostly profiling the 6.5 betas against 6.4.3 to see why were are seeing a net server-timing regressionregression A software bug that breaks or degrades something that previously worked. Regressions are often treated as critical bugs or blockers. Recent regressions may be given higher priorities. A "3.6 regression" would be a bug in 3.6 that worked as intended in 3.5. in spite of the improvements we’ve made. So far, I haven’t found a clear cause or opportunity to avoid the regression but am continuing to look. More eyes would be helpful for sure.
  • @spacedmonkey There are 1020 matches for register_block_pattern in the 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 Plugin Directory or can be cost-based plugin from a third-party repo –

Database Optimization

Notes from today’s meeting:

  • @flixos90 I’m planning to get back to looking at the PR for #42441 later this week

JavaScriptJavaScript JavaScript or JS is an object-oriented computer programming language commonly used to create interactive effects within web browsers. WordPress makes extensive use of JS for a better user experience. While PHP is executed on the server, JS executes within a user’s browser. & CSSCSS Cascading Style Sheets.

  • Link to the GitHub project board
  • Contributors: @mukesh27 @flixos90 @westonruter @thelovekesh
  • Projects from the 2024 roadmap:
    • INP opportunities research
    • Interactivity APIAPI An API or Application Programming Interface is a software intermediary that allows programs to interact with each other and share data in limited, clearly defined ways.
    • Speculative prerendering
    • Embed Optimizer

Notes from today’s meeting:

  • @westonruter the Embed Optimizer is ready for initial submission to the directory
  • @thelovekesh Web Worker offloading aka Partytown module is ready for final review. Since INP date is coming soon and it provides a good opportunity to offload 3P scripts, I think we can move forward with it


  • Link to the GitHub project board
  • Contributors: @flixos90 @adamsilverstein @joemcgill @westonruter
  • Projects from the 2024 roadmap:
    • Optimization Detective (formerly Image loading optimization)
    • API to facilitate more accurate “sizes” attribute
    • Land AVIF support in coreCore Core is the set of software required to run WordPress. The Core Development Team builds WordPress.
    • Client side image compression

Notes from today’s meeting:

  • @westonruter For Optimization Detective (formerly Image Loading Optimization), this PR needs review:
  • @adamsilverstein AVIF support is landed a while back and the dev note published. also in 6.5 we’ll have progressive image support (which will be mentioned in the field guideField guide The field guide is a type of blogpost published on Make/Core during the release candidate phase of the WordPress release cycle. The field guide generally lists all the dev notes published during the beta cycle. This guide is linked in the about page of the corresponding version of WordPress, in the release post and in the HelpHub version page.)


Notes from today’s meeting:

  • @joemcgill The only thing currently in progress related to this is the fixes to the 6.4 performance tests, which @thelovekesh volunteered to work on recently.

Ecosystem Tools

Notes from today’s meeting:

  • @mukesh27 for Creating standalone plugins milestone 2b:
    • PRs that have been merged:
      • PR #999 – Move Auto Sizes plugin assets to plugins folder
      • PR #1014 – Fix unit test for Multisitemultisite Used to describe a WordPress installation with a network of multiple blogs, grouped by sites. This installation type has shared users tables, and creates separate database tables for each blog (wp_posts becomes wp_0_posts). See also network, blog, site
    • PRs ready for Review:
      • PR #1000 – Implement publishing workflow for standalone plugins that aren’t modules
      • PR #1002 – Separate phpcs.xml.dist Files for Each Plugin to Isolate Text Domains
      • PR #1011 – Move published modules to standalone plugins (Another contributor @thelovekesh is working on this)
  • @thelovekesh Aside, I have started a discussion on improving the DX in new monorepo setup –

Open Floor

  • @pbearne I have been working on the old core performance tickets. Clearing out won’t fix and refreshing the code as needed. if anybody wants me to jump to a later ticketticket Created for both bug reports and feature development on the bug tracker., pingPing The act of sending a very small amount of data to an end point. Ping is used in computer science to illicit a response from a target server to test it’s connection. Ping is also a term used by Slack users to @ someone or send them a direct message (DM). Users might say something along the lines of “Ping me when the meeting starts.” me
  • @johnbillion What’s the process for adding the [Focus] ... label to an issue? Is that for categorisation or only for issues that are an active focus for each team?
    • @flixos90 It’s categorization primarily. We have never had anything (at least as far as I remember) that didn’t fit in one of the existing focus groups
    • @joemcgill I believe that they used to align to the original project boards that were set up on the repo, which have evolved over the past few years, so they probably need a refresh at some point. Currently, I agree we’re not really using them for any reason

Our next chat will be held on Tuesday, March 5, 2024 at 16:00 UTC in the #core-performance channel in Slack.

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