Just released, another plugin called for the Unity Asset Store called Pool Manager Breed. This plugin is perfect for games that involves a lot of Game Objects being Instantiated and Destroyed time and time again. Ideal for mobile games – or just in general really. It improves performance by enabling and disabling Game Objects instead of creating and destroying them.

With the Breed plugin you can:

• Pre-Instantiate a specific number of Game Objects
• It will dynamically grow if you end up needing more Game Objects than allocated
• It does not require any additional scripts to be attached to your Game Objects. It just calls OnSpawn and OnUpsawn functions when initialization and cleanups

You can view a working demo here and view the docs here.