[DUG] Saving aray

[John Bird]

I have a program that builds a very large array (over 1,500,000) of integers, and the calculation to fill the array takes quite a while – around 40-50 secs.   If there is a quick way to do it, I would save the array to disk if it was faster than recalculating it the next time.

I am guessing that writing the elements to strings and using CSV etc would be quite slow, as it involves quite a lot of processing.   I will run a test to see.

Is there any really fast way to save such an array to disk?   The numbers range between 0 and 256 if that helps.
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