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

As others have said, there is no difference.

0 has to be evaluated. flag has to be evaluated. This process takes the same time, no matter which side they're placed.

The right answer would be: they're both the same speed.

Even the expressions if(flag==0) and if(0==flag) have the same amount of characters! If one of them was written as if(flag== 0), then the compiler would have one extra space to parse, so you would have a legitimate reason at pointing out compile time.

But since there is no such thing, there is absolutely no reason why one should be faster than other. If there is a reason, then the compiler is doing some very, very strange things to generated code...