> Depending on your architecture, that could use 24 bytes per ASCII character (if the char in the struct is padded with 64-bit pointers). Quite possibly much m

> Depending on your architecture, that could use 24 bytes per ASCII character (if the char in the struct is padded with 64-bit pointers). Quite possibly much more than that because of allocator overhead. Main sources of overhead are rounding (i.e. the allocator might give you a 32-byte slot when you ask for 24 bytes) and bookkeeping (it needs to keep track of all allocations, which tends to require the storage of addresses and bitmaps .. in some kind of a data structure).