RegreSQL automates regression testing for SQL queries in PostgreSQL. It runs your SQL files, compares the output to expected results, and alerts you to any changes. The tool supports snapshot management and allows for configuration of test parameters.

The article discusses various methods to intentionally slow down PostgreSQL databases for testing purposes. It explores different configurations and practices to simulate performance degradation, aiding developers in understanding how their applications behave under stress. This approach helps in identifying potential bottlenecks and preparing for real-world scenarios.