http://www.perlmonks.org?node_id=1074483


in reply to Comparing large files

I have two large (10Mg plus)

10 Milligram files? Must be light words :)

Assuming you mean 10 million, and you have at least 2GB of ram, then:

Load the first file of words into a hash.

Read the second file line by line and check if the word is in the hash.

Don't forget to chomp the newlines.


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