What methods can be applied to optimize the system's speed when only necessary information is transmitted to the user?

To optimize system performance when transmitting only the necessary information to the user, the following methods can be applied:

• Server-side data filtering: send only the fields and records needed by the client.
• Pagination: split large data sets into pages to avoid loading everything at once.
• Caching: store frequently requested data in memory or on disk for quick access.
• Compression: compress data during transmission (e.g., gzip).
• Database query optimization: use selective queries, indexes, and avoid redundant joins.
• Lazy loading: load data as needed, not all at once.

Example in Java using pagination and selective fields:

// Pseudocode for fetching only necessary fields with pagination
List<UserDTO> users = userRepository.findUsers(pageNumber, pageSize);

Thus, the volume of transmitted data is reduced, and system responsiveness is improved.