_prime_comment_caches() │ WP 4.4.0

Adds any comments from the given IDs to the cache that do not already exist in cache.

Internal function — this function is designed to be used by the kernel itself. It is not recommended to use this function in your code.

No Hooks.

Returns

null. Nothing (null).

Usage

_prime_comment_caches( $comment_ids, $update_meta_cache );

$comment_ids(int[]) (required): Array of comment IDs.
$update_meta_cache(true|false): Whether to update the meta cache.
Default: true

Notes

See: update_comment_cache()
Global. wpdb. $wpdb WordPress database abstraction object.

Changelog

Since 4.4.0	Introduced.
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.

`_prime_comment_caches() prime comment caches` code ^{WP 6.9.1}

wp-includes/comment.php

function _prime_comment_caches( $comment_ids, $update_meta_cache = true ) {
	global $wpdb;

	$non_cached_ids = _get_non_cached_ids( $comment_ids, 'comment' );
	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, false );
	}

	if ( $update_meta_cache ) {
		wp_lazyload_comment_meta( $comment_ids );
	}
}