Use PreparedStatements to allow the database to cache execution plans. This reduces parsing overhead and protects against SQL injection.
The foundation of any Java data access layer is . Even when using JPA, the performance of your application is heavily dictated by how you handle raw database interactions. High-Performance Java Persistence
High-Performance Java Persistence: A Guide to Scalable Data Access Use PreparedStatements to allow the database to cache
Database connections are expensive to create. Always use a connection pool (like HikariCP ) and monitor it with tools like FlexyPool to find the right pool size. High-Performance Java Persistence