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The forwarding pointer (sometimes called a "broken heart") is used only during the garbage collection process; when a reference to an object already in to-space (thus having a forwarding pointer in from-space) is found, the reference can be updated quickly simply by updating its pointer to match the forwarding pointer.
Because the strategy is to exhaust all live references, and then all references in referenced objects, this is known as a ''[[breadth-first]]'' list copying garbage collection scheme.
==Sample algorithm==
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