[MaxBarraclough]

Any idea what's going on with the mem values in the listing in your second link?

Wouldn't expect a C++ implementation to use 200x the memory of a C implementation. Different algorithms presumably? Or a significant compiler optimisation being missed?

[heeen2]

Maybe because the cpp version includes stdlib on top of stdio?

[MaxBarraclough]

Ah, of course. So the problem doesn't involve any real allocations, and it's just the language overhead that we're seeing.