How do PostgreSQL's Hstore and Redis compare performance-wise? This question was asked here, but I would like to compare with a PostgreSQL configuration without durability guarantee, i.e. with synchronous_commit off or with fsync and full_page_writes off.
PostgreSQL 9.3, concurrency level: read committed.
For the record size, read vs write and number of tuples by operation, it would be interesting to know where Hstore and Redis perform better in each of those cases, and if there is any configuration where Hstore would perform better.