Improving performance with the object pool pattern
The object pool pattern instantiates ready-to-use objects and limits their initialization time. The required instances can be recreated on demand. A pool of objects can represent a base of conditions on which new instances could be created, or limit their creation.
Motivation
Instead of constantly creating new object instances over the code base, the object pool provides an encapsulated solution for managing application or client performance by serving an already initialized object ready for use. The pattern separates the build logic from the business code and helps manage the resource and performance aspects of the application. It may not only help with an object’s life cycle but also with validation when it is created or destroyed.
Finding it in the JDK
A nice example of the object pool pattern is the ExecutorService interface found in the java.util.concurrent package and the implementation provided by the Executors...
