If you're checking to see if two files match exactly, there's no need to read either into memory; you can use something like Digest::file, and compare the check sums for equality1. In the (rather likely) event that you need to determine the actual differences between the files (as in diff or even Windows' fc, your first route should be to use a module like File::Compare.

1 Some of the checksum algorithms will give false positives, in that identical checksums may be produced by different files. I believe "Algorithm 1" used by sum may be especially prone to this.

Information about American English usage here and here. Floating point issues? Please read this before posting. — emc

In reply to Re: Two files comparison by swampyankee
in thread Two files comparasion by ganilmohan

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