Interpolation Search—A Log LogN Search

Yehoshua Perl, Alon Itai, Haim Avni

Research output: Contribution to journalArticlepeer-review

90 Scopus citations


Interpolation search is a method of retrieving a desired record by key in an ordered file by using the value of the key and the statistical distribution of the keys. It is shown that on the average log logN file accesses are required to retrieve a key, assuming that the N keys are uniformly distributed. The number of extra accesses is also estimated and shown to be very low. The same holds if the cumulative distribution function of the keys is known. Computational experiments confirm these results.

Original languageEnglish (US)
Pages (from-to)550-553
Number of pages4
JournalCommunications of the ACM
Issue number7
StatePublished - Jul 1 1978
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Computer Science


  • average number of accesses
  • binary search
  • database
  • interpolation search
  • retrieval
  • searching
  • uniform distribution


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