Disabling Drupal 8 page caching significantly increases CPU use

As I noted five days ago, Mollom went out of business so I had to switch this Drupal 8 website to use a different module to control comment spam. I ended up adding two modules that work together, but the side effect of using their best features is that they end up disabling Drupal 8 page caching. This image clearly shows the result that disabling page caching has on CPU use.

Photo D8