I thought this was fairly common knowledge. Using a DB PKID is a faster lookup than a text slug and uses much less storage space in the DB. For SEO / URL perm

I thought this was fairly common knowledge. Using a DB PKID is a faster lookup than a text slug and uses much less storage space in the DB. For SEO / URL permanence reasons, the PKID is always the authoritative key while the slug can be updated to represent the current content of the URL.