The order in which keys are returned by keys/each/value are supposed to be random (not crypotgraphically random, but explicity coded as random, with the random factor being different for each run (see PERL_HASH_SEED).
Uh, it may be different each time you run the script, but if you iterate through the same hash twice in your script, you'll get the same order twice.

In reply to Re^2: Random hash element (low memory edition). by bart
in thread Random hash element (low memory edition). by amarquis

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