If you double the number of 25-ers, you double the time.

Yes.

If you double the average length of the strings, you slightly less than double the time.

No: 1 + 50C1 + 50C2 = 1 + 50 + 1225 = 1276, nearly 4 times the 326 different regexps required for a length-25 string.

Of course there are two ways of allowing for fuzziness: replace /x/ with /[^x]/, or replace it with /./; the latter approach means you don't also need the 0- and 1-mismatch patterns, leaving 300 patterns (for length-25, up to 2 errors) or 1225 (for length-50).

Hugo

In reply to Re^2: Fuzzy Searching: Optimizing Algorithm Selection by hv
in thread Fuzzy Searching: Optimizing Algorithm Selection by Itatsumaki

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