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Comments: Always lazily load comment meta. 

In [34270] introduced lazy loading of comment meta. However, this was only in the context of `WP_Query`. Other parts of the codebase, like `WP_Comment_Query` did not lazily load comment meta. In this change, calls to `update_meta_cache` are now replaced with `wp_lazyload_comment_meta`, that instead of priming comment meta caches, just adds them to the queue to be primed it ever called. This results in far less database queries, as there a number of places where comment meta is being primed unnecessarily and never used. Adding everything to the comment meta queue, also means that if comment meta is used, that is all loaded in a single database / cache call.

Follow on from [55671], [55747].

Props spacedmonkey, peterwilsoncc, flixos90, mukesh27.
Fixes #57801.
Built from https://develop.svn.wordpress.org/trunk@55749


git-svn-id: http://core.svn.wordpress.org/trunk@55261 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This commit is contained in:
spacedmonkey 2023-05-11 12:27:22 +00:00
parent d35d467c9c
commit fda9000c7b
6 changed files with 38 additions and 24 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
wp-admin/includes/class-wp-comments-list-table.php
View File

@ -165,8 +165,6 @@ class WP_Comments_List_Table extends WP_List_Table {
$_comments = get_comments( $args );
if ( is_array( $_comments ) ) {
update_comment_cache( $_comments );
$this->items = array_slice( $_comments, 0, $comments_per_page );
$this->extra_items = array_slice( $_comments, $comments_per_page );

6
wp-includes/class-wp-comment-query.php
View File

@ -481,12 +481,16 @@ class WP_Comment_Query {
$comment_ids = array_map( 'intval', $comment_ids );
if ( $this->query_vars['update_comment_meta_cache'] ) {
wp_lazyload_comment_meta( $comment_ids );
}
if ( 'ids' === $this->query_vars['fields'] ) {
$this->comments = $comment_ids;
return $this->comments;
}
_prime_comment_caches( $comment_ids, $this->query_vars['update_comment_meta_cache'] );
_prime_comment_caches( $comment_ids, false );
// Fetch full comment objects from the primed cache.
$_comments = array();

9
wp-includes/class-wp-query.php
View File

@ -2813,7 +2813,7 @@ class WP_Query {
$comment_ids = $wpdb->get_col( $comments_request );
wp_cache_add( $cache_key, $comment_ids, 'comment-queries' );
}
_prime_comment_caches( $comment_ids, false );
_prime_comment_caches( $comment_ids );
// Convert to WP_Comment.
/** @var WP_Comment[] */
@ -3372,7 +3372,7 @@ class WP_Query {
$comment_ids = $wpdb->get_col( $comments_request );
wp_cache_add( $comment_cache_key, $comment_ids, 'comment-queries' );
}
_prime_comment_caches( $comment_ids, false );
_prime_comment_caches( $comment_ids );
// Convert to WP_Comment.
/** @var WP_Comment[] */
@ -3487,11 +3487,6 @@ class WP_Query {
}
}
// If comments have been fetched as part of the query, make sure comment meta lazy-loading is set up.
if ( ! empty( $this->comments ) ) {
wp_queue_comments_for_comment_meta_lazyload( $this->comments );
}
if ( ! $q['suppress_filters'] ) {
/**
* Filters the array of retrieved posts after they've been fetched and

13
wp-includes/comment-template.php
View File

@ -1440,12 +1440,11 @@ function comments_template( $file = '/comments.php', $separate_comments = false
$comment_author_url = esc_url( $commenter['comment_author_url'] );
$comment_args = array(
'orderby' => 'comment_date_gmt',
'order' => 'ASC',
'status' => 'approve',
'post_id' => $post->ID,
'no_found_rows' => false,
'update_comment_meta_cache' => false, // We lazy-load comment meta for performance.
'orderby' => 'comment_date_gmt',
'order' => 'ASC',
'status' => 'approve',
'post_id' => $post->ID,
'no_found_rows' => false,
);
if ( get_option( 'thread_comments' ) ) {
@ -2380,8 +2379,6 @@ function wp_list_comments( $args = array(), $comments = null ) {
$parsed_args['reverse_top_level'] = ( 'desc' === get_option( 'comment_order' ) );
}
wp_queue_comments_for_comment_meta_lazyload( $_comments );
if ( empty( $parsed_args['walker'] ) ) {
$walker = new Walker_Comment();
} else {

30
wp-includes/comment.php
View File

@ -484,6 +484,21 @@ function get_comment_meta( $comment_id, $key = '', $single = false ) {
return get_metadata( 'comment', $comment_id, $key, $single );
}
/**
* Queue comment meta for lazy-loading.
*
* @since 6.3.0
*
* @param array $comment_ids List of comment IDs.
*/
function wp_lazyload_comment_meta( array $comment_ids ) {
if ( empty( $comment_ids ) ) {
return;
}
$lazyloader = wp_metadata_lazyloader();
$lazyloader->queue_objects( 'comment', $comment_ids );
}
/**
* Updates comment meta field based on comment ID.
*
@ -514,6 +529,9 @@ function update_comment_meta( $comment_id, $meta_key, $meta_value, $prev_value =
* Queues comments for metadata lazy-loading.
*
* @since 4.5.0
* @since 6.3.0 Use wp_lazyload_comment_meta() for lazy-loading of comment meta.
*
* @see wp_lazyload_comment_meta()
*
* @param WP_Comment[] $comments Array of comment objects.
*/
@ -528,10 +546,7 @@ function wp_queue_comments_for_comment_meta_lazyload( $comments ) {
}
}
if ( $comment_ids ) {
$lazyloader = wp_metadata_lazyloader();
$lazyloader->queue_objects( 'comment', $comment_ids );
}
wp_lazyload_comment_meta( $comment_ids );
}
/**
@ -3331,6 +3346,7 @@ function update_comment_cache( $comments, $update_meta_cache = true ) {
*
* @since 4.4.0
* @since 6.1.0 This function is no longer marked as "private".
* @since 6.3.0 Use wp_lazyload_comment_meta() for lazy-loading of comment meta.
*
* @see update_comment_cache()
* @global wpdb $wpdb WordPress database abstraction object.
@ -3345,7 +3361,11 @@ function _prime_comment_caches( $comment_ids, $update_meta_cache = true ) {
if ( ! empty( $non_cached_ids ) ) {
$fresh_comments = $wpdb->get_results( sprintf( "SELECT $wpdb->comments.* FROM $wpdb->comments WHERE comment_ID IN (%s)", implode( ',', array_map( 'intval', $non_cached_ids ) ) ) );
update_comment_cache( $fresh_comments, $update_meta_cache );
update_comment_cache( $fresh_comments, false );
}
if ( $update_meta_cache ) {
wp_lazyload_comment_meta( $comment_ids );
}
}

2
wp-includes/version.php
View File

@ -16,7 +16,7 @@
*
* @global string $wp_version
*/
$wp_version = '6.3-alpha-55748';
$wp_version = '6.3-alpha-55749';
/**
* Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.