[wp-trac] [WordPress Trac] #34359: Cache output of `wp_upload_dir()` to improve performance

[WordPress Trac]

#34359: Cache output of `wp_upload_dir()` to improve performance
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 Reporter:  DH-Shredder   |       Owner:  DH-Shredder
     Type:  defect (bug)  |      Status:  assigned
 Priority:  normal        |   Milestone:  4.4
Component:  Media         |     Version:
 Severity:  normal        |  Resolution:
 Keywords:  needs-patch   |     Focuses:  multisite, performance
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Comment (by azaozz):

 Looks like `wp_upload_dir()` is intended to be called (mostly) in wp-
 admin, when saving or deleting an uploaded file, etc. It would be nice to
 cache all of it but that may prove difficult or bring edge cases.

 As far as I see responsive images only need `$uploads_dir['baseurl']`.
 Maybe only this can be cached for now, so there is only one call to
 `wp_upload_dir()` per front-end page load.

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Ticket URL: <https://core.trac.wordpress.org/ticket/34359#comment:6>
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