The GET method is idempotent and is used primarily for retrieving data from the server.

Using asynchronous processing in servlets is effective for reducing response time by allowing the server to handle other tasks while waiting for I/O operations, leading to improved overall system responsiveness.

Connection pooling optimizes database interactions by reusing existing database connections, reducing the overhead of establishing a new connection for each request.

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.

Using StringBuilder instead of concatenation in loops for string manipulation enhances performance in servlets because StringBuilder is more efficient in handling string concatenation operations.

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.