Which one will execute faster, if (flag==0) or if (0==flag)?

Question

Interview question: Which one will execute faster, if (flag==0) or if (0==flag)? Why?

Answer 1

There will be no difference in your versions.

I'm assuming that the type of flag is not user-defined type, rather it's some built-in type. Enum is exception!. You can treat enum as if it's built-in. In fact, it' values are one of built-in types!

In case, if it's user-defined type (except enum), then the answer entirely depends on how you've overloaded the operator == . Note that you've to overload == by defining two functions, one for each of your versions!