Source

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

public function get_per_page( $comment_status = 'all' ) {
		$comments_per_page = $this->get_items_per_page( 'edit_comments_per_page' );
		/**
		 * Filters the number of comments listed per page in the comments list table.
		 *
		 * @since 2.6.0
		 *
		 * @param int    $comments_per_page The number of comments to list per page.
		 * @param string $comment_status    The comment status name. Default 'All'.
		 */
		return apply_filters( 'comments_per_page', $comments_per_page, $comment_status );
	}