Spring Boot Data JPA Mapping takes time

Question

I am using Spring Boot for creating Microservice. I have a basic entity object like below and its corresponding repository class and it fetches close to 400 records. It takes more time than expected. There is no joins involved here.

Entity.java

@Entity
@Table(name="VW_EMPLOYEE", schema="emp")
public class Employee {
   @EmbeddedId
   private EmployeeId id;
 
   @column("amount1")
   private BigDecimal amt1;

   @column("amount2")
   private BigDecimal amt2;

   @column("amount3")
   private BigDecimal amt3;

   @column("amount4")
   private BigDecimal amt4;
   ...
}

EmployeeId.java

@Embeddable
public class EmployeeId {
  @column(name="EmpName")
  private String empName;

  @column(name="DOB")
  private LocalDate dob;
}

EmployeeRepository.java

@Repository
public interface EmployeeRepository extends PagingAndSortingRepository<Employee, EmployeeId> {

    @Query("select a from Employee a where a.id.empName= :empName and a.id.dob between :startDate and :endDate")
    public Optional<List<Employee>> findEmployees(String empId, LocalDate startDate, LocalDate endDate); 
}

When I call the repository method, employeeRepository.findEmployees(...), it fetches close to 400 records. I see only single query getting generated in log file. But it takes more time than expected. In logs I see below lines,

[org.hibernate.engine.internal.TwoPhaseLoad][initializeEntityEntryLoadedState][Resolving Attributes for com.Employee#component [employeeName, dob]{employeeName="...", dob="..."}]
[Processing Attribute `amt1`: value='133432233']
[Attribute (`column1`) - enhanced for Lazy Loading? - false]

Attributes for com.Employee#component [employeeName, dob]{employeeName="...", dob="..."}]
[Processing Attribute `amt2`: value='48899877']
[Attribute (`column1`) - enhanced for Lazy Loading? - false]

Attributes for com.Employee#component [employeeName, dob]{employeeName="...", dob="..."}]
[Processing Attribute `amt3`: value='334422123']
[Attribute (`column1`) - enhanced for Lazy Loading? - false]

Attributes for com.Employee#component [employeeName, dob]{employeeName="...", dob="..."}]
[Processing Attribute `amt4`: value='44322112']
[Attribute (`column1`) - enhanced for Lazy Loading? - false]

I see above 4 statements for 400 records. Is it taking more time for mapping the DB data with Entity collections I think. Time it takes for 400 records is close to 2-3 seconds. I want to bring it down to less than a second.