A multiplicative α-spanner H is a subgraph of G = (V,E) with the same vertices and fewer edges that preserves distances up to the factor α, i.e., d_H(u,v) ≤ α⋅ d_G(u,v) for all vertices u, v. While many algorithms have been developed to find good spanners in terms of approximation guarantees, no experimental studies comparing different approaches exist. We implemented a rich selection of those algorithms and evaluate them on a variety of instances regarding, e.g., their running time, sparseness, lightness, and effective stretch.
@InProceedings{chimani_et_al:LIPIcs.ESA.2022.37, author = {Chimani, Markus and Stutzenstein, Finn}, title = {{Spanner Approximations in Practice}}, booktitle = {30th Annual European Symposium on Algorithms (ESA 2022)}, pages = {37:1--37:15}, series = {Leibniz International Proceedings in Informatics (LIPIcs)}, ISBN = {978-3-95977-247-1}, ISSN = {1868-8969}, year = {2022}, volume = {244}, editor = {Chechik, Shiri and Navarro, Gonzalo and Rotenberg, Eva and Herman, Grzegorz}, publisher = {Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik}, address = {Dagstuhl, Germany}, URL = {https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.ESA.2022.37}, URN = {urn:nbn:de:0030-drops-169750}, doi = {10.4230/LIPIcs.ESA.2022.37}, annote = {Keywords: Graph spanners, experimental study, algorithm engineering} }
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