I ran your test on my 32 bit machine. The AoH took 411 MB, then I tried an AoA and that wasn't much better, 336 MB. I conclude that the hash overhead in terms of storage isn't as much as one might imagine! Then I ran the string version and as you observe 52 MB - way smaller than either of the above.

I attribute the difference in MB numbers to greater size of pointers on your 64 bit machine, not to any difference in the benchmark.

In reply to Re^2: System out of memory while storing huge amount of data by Marshall
in thread System out of memory while storing huge amount of data by kalyanrajsista

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