Provided is a method for string comparison. The method includes receiving a plurality of target strings. Each target string of the plurality of target strings comprises a sequence of characters. The method further includes creating a character index for the plurality of target strings having a plurality of entries corresponding to the sequence of characters. The method further includes prioritizing the plurality of entries. The method further includes determining an evaluation method for the plurality of target strings based on the plurality of prioritized entries. The method further includes performing the evaluation method for the plurality of target strings.