Object relational mappers (ORMs) have been in use for a long time to eliminate the impedance mismatch that exists between the object models of programming languages and the data models in relational databases. Dapper is an open source, lightweight ORM developed by the Stack Overflow team. Dapper is very fast compared to other ORMs primarily because of its light weight.
Dapper was built with performance and ease of use in mind. It provides support for both static and dynamic object binding using transactions, stored procedures, or bulk inserts of data.