[wp-trac] [WordPress Trac] #12611: Performance hit from update_post_caches

[WordPress Trac]

#12611: Performance hit from update_post_caches
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 Reporter:  prettyboymp   |       Owner:              
     Type:  defect (bug)  |      Status:  new         
 Priority:  normal        |   Milestone:  Unassigned  
Component:  Performance   |     Version:              
 Severity:  normal        |    Keywords:  dev-feedback
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 I question the benefit from updating the post cache during the
 update_post_caches function, specifically where WP_Query->get_posts()
 calls the update_post_caches with the returned posts.  Since a majority of
 all get_post() calls using posts that were returned from
 WP_Query->get_posts() will be used within the loop where the global $post
 would be used instead of the instance in cache.

 Normally, this wouldn't be a big deal, except that in performance testing
 on a site with memcache setup, the cost of the call to update_post_caches
 is responsible for ~127ms, or 10% - 20% of the rendering time.

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Ticket URL: <http://core.trac.wordpress.org/ticket/12611>
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