How could I sensibly overload placement operator new?

Question

C++ allows overloading operator new - both global and per-class - usual operator new, operator new[] used with new[] stat

Answer 1

My primary usage is to create a large array of objects. Its performing much better and has less overhead to allocate the memory in a whole block, i.e. using VirtualAlloc from Win32 (when programming windows). Then you just pass a ptr within that block to each objects placement new such as:

char *cp = new char[totalSize];

for(i = 0; i < count; i++, cp += ObjSize)        
{                                                        
    myClass *obj = new(cp) myClass;             
}