Journal of Computer Science

A Fast Approximate String Searching Algorithm

Mahmoud Mhashi, Adnan Rawashdeh and Awni Hammouri

DOI : 10.3844/jcssp.2005.405.412

Journal of Computer Science

Volume 1, Issue 3

Pages 405-412


In both approximate and exact string searching algorithms, the shift distance at the skipping step plays a major role in the performance of string matching algorithms. A new algorithm called the Modified Character-Weight Algorithm (MWA) has been developed to test the effect of the shift distance on the performance of approximate string matching. An experiment was performed comparing the performance of the MWA with that of Mhashi’s Character-Weight Algorithm (WA) using English text of size 1,005,077 characters. Using the average number of comparisons and the clock time as evaluation criteria, the MWA algorithm used only about 4% to 15% as many comparisons as the WA algorithm and about 10% to 35% of the clock time.


© 2005 Mahmoud Mhashi, Adnan Rawashdeh and Awni Hammouri. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.