Alignment on Struct and Global Variable?

[Bryan Parkoff]

I know that after optimization is done under C++ compiler's option, it
always align byte and word into dword inside struct. What about global
variable in this slope?
If global variable has done with alignment by optimization, it would be
great when I write global variable inside namespace group. It has no impact
with the performance between global variable and struct, but they are always
the same.

Bryan Parkoff