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An update: I spent the day reading-about/playing-with hashes, and decided to use them to the problem I had.

Satisfied with the results I now have at a constant 20% single-core utilization (approx), and a peak 1.5GB memory footprint.

$>perl Distinct products: 2083 Number of pairs (incl. duplicates): 4,336,806 Number of pairs (excl. duplicates): 2,168,403 Started processing at 14:04:49 Finished processing at 14:07:24 Finished writing to disk at 14:07:43 $>

PS: This is to determine the pairs only (haven't run the stats using the pairs yet which is the next step).

In reply to Re: creating and managing many hashes by Gtforce
in thread creating and managing many hashes by Gtforce

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