Is it possible to get the size of the memory of a hash/array/variable at runtime, so I can intervene somehow?
If you want to find you how much memory your datastructures are using at run-time check out Elian
the memory of a process can not be freed while the process is not terminating
For most (if not all?) modern OSs this is the case. Until a process exits its allocated memory will not be freed.
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