A Variant of the Fisher-Morris Garbage Compaction Algorithm
Martin, Johannes J.
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The garbage compactification algorithm described works in linear time and, for the most part, does not require any work space. It combines marking and compactification into a two-step algorithm. The first step marks all non-garbage cells and, at the same time, rearranges the pointers such that the cells can be moved, the second step performs the actual compatification.