Abstract
This paper presents a fast algorithm for searching a large text for multiple strings allowing one error. On a fast workstation, the algorithm can process a megabyte of text searching for 1000 patterns (with one error) in less than a second. Although we combine several interesting techniques, overall the algorithm is not deep theoretically. The emphasis of this paper is on the experimental side of algorithm design. We show the importance of careful design, experimentation, and utilization of current architectures. In particular, we discuss the issues of locality and cache performance, fast hash functions, and incremental hashing techniques. We introduce the notion of two-level hashing, which utilizes cache behavior to speed up hashing, especially in cases where unsuccessful searches are not uncommon. Two-level hashing may be useful for many other applications. The end result is also interesting by itself. We show that multiple search with one error is fast enough for most text applications.
Supported in part by NSF grant CCR-9301129, and by the Advanced Research Projects Agency under contract number DABT63-93-C-0052.
The information contained in this paper does not necessarily reflect the position or the policy of the U.S. Government or other sponsors of this research. No official endorsement should be inferred.
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© 1996 Springer-Verlag Berlin Heidelberg
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Muth, R., Manber, U. (1996). Approximate multiple string search. In: Hirschberg, D., Myers, G. (eds) Combinatorial Pattern Matching. CPM 1996. Lecture Notes in Computer Science, vol 1075. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-61258-0_7
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DOI: https://doi.org/10.1007/3-540-61258-0_7
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