Lazy loading in servlets improves performance by loading resources only when needed, avoiding unnecessary resource loading upfront, which can lead to better response times.

A servlet can process AJAX requests using both the doGet and doPost methods. The choice depends on the nature of the AJAX request and the type of data being sent. Using both methods allows flexibility in handling various types of AJAX requests within the same servlet.

Implementing gzip compression for responses in servlets optimizes performance by reducing response size, minimizing network latency, and improving overall user experience during data transfer.

To optimize performance, a servlet should cache frequently used data in the ServletContext to make it available to all components of the web application.

In high-performance servlets, the Flyweight pattern can be used to manage resource-intensive objects efficiently by sharing common parts of state among multiple objects.

For optimal servlet performance, session data should be kept to a minimum, utilizing Session Tracking for state management.

To improve scalability, servlets can delegate database reads to Stateless instances, as they do not maintain client-specific state between method calls.

Optimizing database queries would be a key strategy in this scenario, as it directly addresses the performance issues associated with handling massive data queries.

Implementing load balancing is a key strategy to distribute the incoming traffic among multiple servers, ensuring a better balance and improved performance for a high-traffic web application.

Reducing unnecessary object creation is a good practice to optimize memory usage in a resource-constrained environment, as it helps minimize the overhead associated with object allocation.