List update with probabilistic locality of reference

  • Authors:
  • Reza Dorrigiv;Alejandro López-Ortiz

  • Affiliations:
  • Cheriton School of Computer Science, University of Waterloo, Waterloo, Ont., N2L 3G1, Canada;Cheriton School of Computer Science, University of Waterloo, Waterloo, Ont., N2L 3G1, Canada

  • Venue:
  • Information Processing Letters
  • Year:
  • 2012

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Abstract

In this paper we study the performance of list update algorithms under arbitrary distributions that exhibit strict locality of reference and prove that Move-To-Front (MTF) is the best list update algorithm under any such distribution. We also show that the performance of MTF depends on the amount of locality of reference, while the performance of any static list update algorithm is independent of the amount of locality.