[wp-trac] [WordPress Trac] #36723: Add caching to wp_old_slug_redirect

[WordPress Trac]

#36723: Add caching to wp_old_slug_redirect
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 Reporter:  spacedmonkey                         |       Owner:
     Type:  enhancement                          |      Status:  new
 Priority:  normal                               |   Milestone:  Awaiting
Component:  Posts, Post Types                    |  Review
 Severity:  normal                               |     Version:  2.1
 Keywords:  has-patch dev-feedback needs-unit-   |  Resolution:
  tests                                          |     Focuses:
                                                 |  performance
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Comment (by dd32):

 The `wp_old_slug_redirect()` function only runs when the current pageload
 is marked as a 404, based on the `is_404()` check at the start of the
 function.

 I don't think caching is the answer here, rather the custom code you're
 using to make a "fake" page needs to flag the page as not-a-404 to
 WordPress.

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Ticket URL: <https://core.trac.wordpress.org/ticket/36723#comment:2>
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