Performance: Comments module adds resource hints for unused gravatar domains. #47116
Description
Impacted plugin
Jetpack
Quick summary
In WordPress/wordpress-develop@c1ffe33 for WordPress 6.7, gravatar URLs were updated to always use the secure.gravatar.com domain. This was to avoid redirects from HTTP to HTTPS, with a single domain used because HTTP2 has been around for a while now.
In this block of code the comments module is adding resource hints for the 0., 1. and 2.gravatar.com domains that are no longer used in the rendering of the WordPress comments threads.
jetpack/projects/plugins/jetpack/modules/comments.php
Lines 27 to 29 in ec2faa6
Steps to reproduce
Not entirely sure, sorry.
I saw it on a site running Jetpack comments but am unable to reproduce it locally because the module is unavailable in local dev mode.
Site owner impact
Fewer than 20% of the total website/platform users
Severity
Minor
What other impact(s) does this issue have?
No revenue impact
If a workaround is available, please outline it here.
No response
Platform (Simple and/or Atomic)
No response