This package contains a static and a dynamic pool which have:

• Standard interface
• Timeout for Get()
• Callbacks for Get() and Put()
• Persistence (items are not garbage-collected)

The static pool grows to its size after N many calls to Get(), where N equals the pool size. This is useful for cases where the number of items is also static, for example a worker pool where N many workers are always used.

The dynamic pool grows to its size if the rate of calls to Get() exceeds the rate of calls to Put(). Else, the pool size can, for example, remain at one if there's a single caller (in which case the same item is reused repeatedly).

Neither pool implements pruning or draining.

These pools were inspired by http://openmymind.net/Introduction-To-Go-Channels/, the built-in sync.Pool, and https://github.com/go-sql-driver/mysql.