[wp-trac] [WordPress Trac] #15458: Lazy-load usermeta into the user object

[WordPress Trac]

#15458: Lazy-load usermeta into the user object
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 Reporter:  nacin                       |       Owner:
     Type:  enhancement                 |      Status:  new
 Priority:  normal                      |   Milestone:  3.3
Component:  Performance                 |     Version:
 Severity:  normal                      |  Resolution:
 Keywords:  has-patch needs-unit-tests  |
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Comment (by ryan):

 The amount of data stored in the users group in memcached for a sample
 multisite user was reduced from 22.31K to  0.47K.  Multiply that by
 millions of users for a very nice savings.  On users.php with 17 users,
 the number of trips to the users cache went from ~422 to ~400.  (Numbers
 include local cache fetches, not just memcached trips.) The number of
 trips to the user_meta cache increased sharply from ~13 to ~464.  That is
 to be expected since we're not duplicating user meta in the users cache
 any more and must fetch meta separately.  The overall cache query time is
 roughly the same, however. Gets from the users cache are many times faster
 now that the cache is much smaller.

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Ticket URL: <http://core.trac.wordpress.org/ticket/15458#comment:54>
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