objective c - used memory: c-array vs. NSMutableArray -

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i need store 1.000.000 double values in different arrays (during calculation run). far i'm using nsmutablearray looks memory usage huge. 1 idea use c-array in order avoid storage of objects in nsmutablearray. there way estimate memory usage of nsmutablearray vs. , c-array? (i not find information size of nsnumber-object vs. primitive double or float).

thanks.

it's pretty clear memory consumption of nsarray bigger of raw c array.

how big difference be? well, every value in nsarray, every primitive double has wrapped nsnumber @ least 20 b added every value, bit more.

one estimate can found here: memory size of classes in objective-c

anyway, storing 1 000 000 values in memory bit strange. maybe better store them in file , load them when needed (e.g. using memory mapped file).


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