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Improve user listing performance. Props miqrogroove. see #11914

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git-svn-id: https://develop.svn.wordpress.org/trunk@13576 602fd350-edb4-49c9-b593-d223f7449a82
This commit is contained in:
Ryan Boren
2010-03-03 19:08:30 +00:00
parent a4399a2db5
commit 1604a2e58b
7 changed files with 287 additions and 49 deletions
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wp-includes/pluggable.php
+32
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@@ -139,6 +139,38 @@ function get_userdata( $user_id ) {
}
endif;
if ( !function_exists('cache_users') ) :
/**
* Retrieve info for user lists to prevent multiple queries by get_userdata()
*
* @since 3.0.0
*
* @param array $users User ID numbers list
*/
function cache_users( $users ) {
global $wpdb;
$clean = array();
foreach($users as $id) {
$id = (int) $id;
if (wp_cache_get($id, 'users')) {
// seems to be cached already
} else {
$clean[] = $id;
}
}
if ( 0 == count($clean) )
return;
$list = implode(',', $clean);
$results = $wpdb->get_results("SELECT * FROM $wpdb->users WHERE ID IN ($list)");
_fill_many_users($results);
}
endif;
if ( !function_exists('get_user_by') ) :
/**
* Retrieve user info by a given field