The query to count comments inside WC_Comments::wp_count_comments() is super slow when the site has a significant number of comments (for example, this query takes about 5s to run on WooCommerce.com with 70k comments) and this is a problem specially considering that this method is called on every admin page.
This commit changes WC_Comments::wp_count_comments() to store the comments count in a transient. With this change, the method will run the query to count comments only if the number of comments or their statuses had changed. Before this commit, WC_Comments::wp_count_comments() would run the database query every time a admin page was requested.
If ratings are not required, the total rating count was counting all
reviews which skewed the average rating. In other words, reviews with
no rating were counted as a “zero” rating in the average rating
calculation. This bug was introduced in
83a457b29c which provided a fix for #6839.
This change introduces a new product method `get_review_count()` which
can be used to accurately calculate the total number of reviews for a
product. Some instances of `get_rating_count()` were replaced with
`get_review_count()` where appropriate. Additionally, the
`single-product/rating.php` template was adjusted to display the
correct number of customer reviews and ratings in rich snippets. I’ve
also included the `bestRating` rich snippet detailed
[here](http://schema.org/AggregateRating). The version number was
adjusted to 2.3.2 on that template as I think this is a larger change.
The WC_Comments class is an orphaned global so there's no way for other
code to access it in order to remove the `comment_clauses` filter. This
changes the add_filter and associated method to static so other code
can properly remove the filter for querying order notes
Chase Wiseman
Mike Jolley
Rodrigo Primo
Claudio Sanches
Fredrik Forsmo
Nicola Mustone
Jeff Stieler
Tamara Zuk
shivapoudel
Max Rice
Illimar Tambek
Coen Jacobs
Scott Basgaard