En Wed, 31 Dec 2008 06:34:48 -0200, Steven D'Aprano
<st...@remove-this-cybersource.com.au> escribió:
Each time you are appending to the list, you append a tuple:
((i, j), sim)
where sim is a float and i and j are ints. How much memory does each of
those take?
sys.getsizeof( ((0, 1), 1.1) )
32
(On Windows, 32 bits, I get 36)
So each entry requires 32 bytes. 60 million times 32 bytes = almost 2GB
alone. Plus the list itself will require (approximately) between 230MB
and 460MB just for the pointers.
That was just the size of the "outer" tuple; you have to add the size of
each element too. First one is another 2-item tuple (36 bytes too) plus
its elements (two integers, 12 bytes each). Second element is a float and
takes 16 bytes. Total: 112 bytes per item; the final size may be a bit
smaller because some objects may be shared (e.g. small integers)
--
Gabriel Genellina
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