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Re^4: better array to hash conversionby BrowserUk (Pope)
|on Dec 11, 2012 at 15:38 UTC||Need Help??|
Because all of the map-based methods construct, copy and later discard, multiple, intermediary lists on their way to constructing the hash.
And the costs of doing large numbers of small memory allocations and deallocations add up; especially if they memory manager has to go to the OS a couple of times to expand the process memory pool.
Using for avoids constructing many of the intermediary lists.
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