We consider the performance of standard bin packing algorithms in the random order model. We provide an improved lower bound of 1.15582656 on the asymptotic approximation ratio of Best Fit (BF) for randomly ordered inputs. We also show lower bounds on the asymptotic approximation ratio for two bounded space bin packing algorithms in this model, namely for 2-BF and 2-FF. These are well-studied bounded space algorithms and the first one has the same asymptotic worst-case performance as BF. However, the resulting lower bounds on their performances in the random order model are much higher than that of BF.
@InProceedings{epstein_et_al:LIPIcs.WADS.2025.26, author = {Epstein, Leah and Levin, Asaf}, title = {{Lower Bounds for Several Standard Bin Packing Algorithms in the Random Order Model}}, booktitle = {19th International Symposium on Algorithms and Data Structures (WADS 2025)}, pages = {26:1--26:15}, series = {Leibniz International Proceedings in Informatics (LIPIcs)}, ISBN = {978-3-95977-398-0}, ISSN = {1868-8969}, year = {2025}, volume = {349}, editor = {Morin, Pat and Oh, Eunjin}, publisher = {Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik}, address = {Dagstuhl, Germany}, URL = {https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.WADS.2025.26}, URN = {urn:nbn:de:0030-drops-242577}, doi = {10.4230/LIPIcs.WADS.2025.26}, annote = {Keywords: Bin packing, Best Fit, Random order, Bounded space algorithms} }
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