What are the performance optimization techniques in TypeORM?

TypeORM performance optimization techniques:

1. Use indexes:

   typescript
   @Column()
   @Index()
   email: string;

2. Avoid N+1 queries: Use relations or join to preload related data.

3. Select only necessary fields:

   typescript
   userRepository.find({
     select: ['id', 'name']
   });

4. Use pagination:

   typescript
   userRepository.find({
     skip: 0,
     take: 10
   });

5. Batch operations: Use batch methods of insert and update instead of loop operations.

6. Use caching: Enable cache options in DataSource.

7. Optimize queries:

   • Use QueryBuilder to build efficient queries
   • Avoid SELECT *
   • Use WHERE conditions reasonably

8. Connection pool configuration: Reasonably set poolSize and connection pool parameters.

9. Use native SQL: For complex queries, consider using native SQL.

10. Monitoring and logging: Enable logging option to monitor SQL query performance.