Athanasius identified the code slowdown here. Hash lookups are the fastest way here and generally. The 2 lookups are necessary because you have to verify that the word being checked exists in the counting hash. Otherwise, without this check, a new word (not to be searched for) would be erroneously counted in the hash.

In reply to Re^2: Count number of occurrences of a list of words in a file by Cristoforo
in thread Count number of occurrences of a list of words in a file by Azaghal

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