spacedmonkey 2237f67458 Prime users cache in WP_Query and post REST API controller.
For a call to `WP_Query` or a post REST API request that contains posts from multiple authors, call the `cache_users` function, to ensure that all user data for post authors is primed in 
a single database query. This results in far fewer database queries on multiple author sites. 

Props spacedmonkey, timothyblynjacobs, peterwilsoncc.
Fixes #55716.

Built from https://develop.svn.wordpress.org/trunk@53482


git-svn-id: http://core.svn.wordpress.org/trunk@53071 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2022-06-10 13:39:11 +00:00
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