How To Use Transients To Speed Up A WooCommerce Query

In this video I revisit a code snippet I created to output total number of products purchased, this could seriously impact your site if you have a lot of orders, the solution is to use transients.
Here's a link to the code
neilmatthews.com/how-to-add-t...
Here's a link to the other video I mentioned
neilmatthews.com/products-pur...