Reference counting is also among the simplest forms of memory management to implement. In real-time applications or systems with limited memory, this is important to maintain responsiveness. The main advantage of the reference counting over tracing garbage collection is that objects are reclaimed as soon as they can no longer be referenced, and in an incremental fashion, without long pauses for collection cycles and with clearly defined lifetime of every object. In garbage collection algorithms, reference counts may be used to deallocate objects that are no longer needed. In computer science, reference counting is a programming technique of storing the number of references, pointers, or handles to a resource, such as an object, a block of memory, disk space, and others.

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