[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
-------------------------------------------+-------------------------------
 Reporter:  mikeschroder                   |       Owner:  mikeschroder
     Type:  defect (bug)                   |      Status:  assigned
 Priority:  normal                         |   Milestone:  4.5
Component:  Media                          |     Version:
 Severity:  normal                         |  Resolution:
 Keywords:  needs-testing has-patch early  |     Focuses:  multisite,
                                           |  performance
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Changes (by azaozz):

 * keywords:  needs-testing needs-unit-tests has-patch => needs-testing has-
     patch early
 * milestone:  Future Release => 4.5


Comment:

 In 34359.3.patch:
 - Non-persistent cache like in 34359.2.patch.
 - Cacher the data before the `upload_dir` filter and run the filter every
 time on the cached data.
 - Introduce `wp_get_upload_dir()` for "light weight" use, when a file is
 not being uploaded.
 - Add cache refresh option to `wp_upload_dir()` and use it in the tests.
 - Fix the test a bit: consolidate multiple calls to `gmstrftime()`.

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Ticket URL: <https://core.trac.wordpress.org/ticket/34359#comment:23>
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