[wp-trac] [WordPress Trac] #55463: Add a limit to _prime_*_cache functions

[WordPress Trac]

#55463: Add a limit to _prime_*_cache functions
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 Reporter:  spacedmonkey  |      Owner:  (none)
     Type:  enhancement   |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  Cache API     |    Version:
 Severity:  normal        |   Keywords:  needs-patch good-first-bug
  Focuses:  performance   |
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 The _prime_*_cache functions, like `_prime_post_cache` do a simple query
 to prime caches. This does a IN request to get all the objects. As we know
 the number of objects we wish returned, as have an array, we can add a
 simple LIMIT to the query to improve the performance of the query.

 Example:

 {{{#!php
 $fresh_posts = $wpdb->get_results( sprintf( "SELECT $wpdb->posts.* FROM
 $wpdb->posts WHERE ID IN (%s) LIMIT %d", implode( ',', $non_cached_ids ),
 count( $non_cached_ids ) ) );
 }}}

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Ticket URL: <https://core.trac.wordpress.org/ticket/55463>
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