Performance Chat Summary: 17 October 2023

Table of Contents

Announcements

Welcome to our new members of #core-performance
WordPress 6.4 Release Candidate 1 is today
- Dev notes discussion
  - @joemcgill We started tracking these in this GH issue: https://github.com/WordPress/performance/issues/840
  - @flixos90 updated dev notes ready for review in this Slack thread
  - Two other dev notes for the docs team to review please @webcommsat
    - Object Caching – requires some changes to be owned by @westonruter
    - Template Loading – required some changes to be owned by @westonruter
- @flixos90 to draft the field guide performance section
Reminder about the Performance Hallway Hangout this week Thursday, October 19, 2023 at 04:00 PM GMT+1

@joemcgill has been reviewing 6.5 priorities
- @swissspidy opened #59656 to track merging Performant Translations into WP 6.5
- We plan to pick up work on improving Template Loading (see: https://github.com/WordPress/performance/issues/746)
- I’ll be doing another profiling analysis of 6.4 during RC to see what other issues should be prioritized

@thekt12 Bug (needs unit tests before going for review #59661
@thekt12 also completed my analysis get_posts #59516 Found that for WP_Query fields is the only key that results in modification after cache key generation. I’ll add a writeup shortly
@joemcgill There were several updates made in 6.4 related to autoloaded options, but I know there are a few more things planned. @flixos90 are there updates that need to be made to this tracking issue?

@westonruter there were a couple of late changes that were fixed last week
- #59599
- #59505
@mukesh27 We hope to commence the process of removing jQuery usage from the frontend in WordPress default themes for version 6.5 [Link to tickets]
@pereirinha I’ve been doing research on #59595. I might have a good idea of how to improve it. I hope to have more news later in the week, where I plan to share the findings and potential solutions.

@adamsilverstein I opened a couple of small bugs related to our fetchpriority handling #59641 and #59638
@adamsilverstein I have one more in the works to cover issues where images are used in layouts that change their size for example in columns
@joemcgill We discussed background images last week, but I’m unsure if we ever opened a ticket for that which is here https://github.com/WordPress/gutenberg/pull/53934#issuecomment-1756213964