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1	Index: src/wp-includes/user.php
2	===================================================================
3	--- src/wp-includes/user.php (revision 60000)
4	+++ src/wp-includes/user.php (working copy)
5	@@
6	function count_many_users_posts( $users, $post_type = 'post', $public_only = false ) {
7	global $wpdb;
8
9	if ( empty( $users ) \|\| ! is_array( $users ) ) {
10	return array();
11	}
12
13	+ $cache_key = 'count_many_users_posts:' . md5( maybe_serialize( $users ) . '\|' . $post_type . '\|' . ( $public_only ? '1' : '0' ) );
14	+ $cached = wp_cache_get( $cache_key, 'counts' );
15	+ if ( false !== $cached ) {
16	+ return $cached;
17	+ }
18	+
19	$users = array_map( 'intval', $users );
20
21	$where = get_posts_by_author_sql( $post_type, true, $users, $public_only );
22	$where = preg_replace( '/^\sAND\s/', '', $where );
23
24	$userlist = implode( ',', $users );
25
26	$count = $wpdb->get_results( "SELECT post_author, COUNT(*) AS post_count FROM $wpdb->posts WHERE $where AND post_author IN ($userlist) GROUP BY post_author", ARRAY_A );
27
28	$counts = array_fill_keys( $users, 0 );
29	foreach ( $count as $row ) {
30	$counts[ $row['post_author'] ] = (int) $row['post_count'];
31	}
32	+
33	+ wp_cache_set( $cache_key, $counts, 'counts' );
34
35	return $counts;
36	}

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