Kangaroo: An Efficient Constraint-Based Local Search System Using Lazy Propagation

@inproceedings{Newton2011KangarooAE,
  title={Kangaroo: An Efficient Constraint-Based Local Search System Using Lazy Propagation},
  author={M. A. Hakim Newton and Duc Nghia Pham and Abdul Sattar and Michael J. Maher},
  booktitle={CP},
  year={2011}
}
In this paper, we introduce Kangaroo, a constraint-based local search system. While existing systems such as Comet maintain invariants after every move, Kangaroo adopts a lazy strategy, updating invariants only when they are needed. Our empirical evaluation shows that Kangaroo consistently has a smaller memory footprint than Comet, and is usually significantly faster. 
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