That makes me thing that one can actually calculate the counters without using any memory at all. You only have to sort the array (or arrays) and then traverse it counting consecutive equal elements.

... well, obviously, unless you need to keep the counters in memory for some further processing, but as you have said, the OP hasn't told us yet what his final goal is!

In reply to Re^2: Memory efficient way to deal with really large arrays? by salva
in thread Memory efficient way to deal with really large arrays? by sectokia

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