pg schema has no index

I wonder what the perf will be if there are actually indexes
foreign keys are not indexed by default for pg https://github.com/benawad/fullstack-graphql-airbnb-clone/blob/master/packages/server/src/migration/1531437838812-ListingUser.ts#L7

Start with packages/server/src/migration/1531437838812-ListingUser.ts at the referenced foreign-key definition. Check how the PostgreSQL schema represents indexes and determine what performance comparison is expected. Done means the indexing question is resolved with the relevant schema change or measured result.

Written by the indexing model from the issue text.