Performance team meeting summary 19 April 2022

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

Focus group updates

Announcements

@shetheliving

Images

@adamsilverstein @mikeschroder

GitHub project

Feedback requested

Object Cache

@tillkruess @spacedmonkey

GitHub project

  • @spacedmonkey: Starting to think about dev notes for all the changes to date in core
  • @tillkruess: Working with @pbearne on the flush group PR based on feedback
  • @jeffpaul: Might be better to have a single dev notedev 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 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 Object Cache that includes al the various changes, based on previous feedback

Feedback requested

Site Health

N/A

GitHub project

Feedback requested

Measurement

N/A

GitHub project

  • We’re seeking 1-2 POCs for this group; if you’re interested, please comment here or ping in Slack
  • No updates

Feedback requested

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. https://www.javascript.com/.

@aristath @sergiomdgomes

GitHub project

  • No updates

Feedback requested

Infrastructure

@flixos90

GitHub project

Feedback requested

Open floor

  • Performance team at WCEU
  • @codekraft: Did some research on lossy formats. This website contains a script to compare images and there’s something interesting about the quality of converted images. In particular on this page there is the comparison of images converted using a JPG (-q 80%) using as reference the original PNG. The issue is called generation loss.
    • @adamsilverstein Seems like a great way to compare image formats. I see you’ve included both MozJPEG and pjpeg – is pjpeg the classic JPEG compressor?
    • @codekraft: pjpeg is progressive JPEG, the new addition is JXL (JPG XL)
    • @adamsilverstein: File size savings for JPEGXL are impressive; didn’t realize there was a library for compressing it yet

Help wanted

#core-js, #core-media, #performance, #performance-chat, #summary