From highest rated answer of this post (Drupal 6 case): Does having too many content types negatively affect site speed and performance?
It is said that:
Sharing fields among the content types does affect the performance.
But when creating new content type in Drupal 7, the body field will be pre-populated. When many content types created, if not deleted, this field will be shared among all content types.
This is the body field as seen in
The question is, does it affect performance? and what is the best to do for performance? Do I need to delete the pre-populated body?