Add option to partially hash files #195
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Adds the `-partialchecksum` option which takes in the number of MB to be hashed from the start and end of the file instead of hashing the whole file. This option is set to 0 by default which means it is disabled. When it is set to a value like 1, the first 1mb of the file would be read, the we'd skip head to file_size - 1mb and read that last 1mb to compute the checksum. This option will only take info effect if file_size > 2 * partial checksum size. This has the tradeoff of much quicker hashing times (the different hashing algos don't matter much where you're limited by disk speed) at the risk of false positives.
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Adds the
-partialchecksumoption which takes in the number of MB to be hashed from the start and end of the file instead of hashing the whole file.This option is set to 0 by default which means it is disabled.
When it is set to a value like 1, the first 1mb of the file would be read, the we'd skip head to file_size - 1mb and read that last 1mb to compute the checksum.
This option will only take info effect if file_size > 2 * partial checksum size.
This has the tradeoff of much quicker hashing times (the different hashing algos don't matter much where you're limited by disk speed) at the risk of false positives.