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

The doPost() method in HTTP servlets is commonly used for handling form submissions as it is designed for processing data sent in the body of an HTTP POST request.

To minimize server load, servlets can implement Asynchronous Servlets to handle asynchronous processing and improve the overall scalability of the application.

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

The finalize keyword in Java is used to manually suggest the garbage collector to consider an object for garbage collection.

Cache is not a type of memory area in the Java Virtual Machine (JVM). The primary memory areas in JVM include Heap, Stack, and Registers.

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.