Thanks all for your help. I was silly to manually vivify the array ref. I tried a few variants, but I cannot squeeze out the performance that I want. Maybe the problem can be solved on the writing end: Is they a good (best!) way to store a hash of variable-length arrays of unsigned integers? Instead of key,value pairs with redundant keys? -poster

In reply to Re: Unpacking small chucks of data quickly by Anonymous Monk
in thread Unpacking small chucks of data quickly by Anonymous Monk

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