[wp-trac] [WordPress Trac] #61343: Improve caching in get_calendar function

[WordPress Trac]

#61343: Improve caching in get_calendar function
--------------------------+-----------------------------
 Reporter:  spacedmonkey  |      Owner:  (none)
     Type:  enhancement   |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  Widgets       |    Version:
 Severity:  normal        |   Keywords:  good-first-bug
  Focuses:  performance   |
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 The `get_calendar` function is used to generate the calendar. There are a
 number of things that can be done to improve the performance of this
 function.

 - Replace the raw query to posts table with call to WP_Query query class.
 - Change cache invalidation from
 {{{#!php
 add_action( 'save_post', 'delete_get_calendar_cache' );
 add_action( 'delete_post', 'delete_get_calendar_cache' );
 }}}
 to
 {{{#!php
 add_action( 'clean_post_cache', 'delete_get_calendar_cache' );
 }}}
 - Instead of store all caches in a simple cache key, break them up and
 invalidate caches in another way.

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Ticket URL: <https://core.trac.wordpress.org/ticket/61343>
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