I suppose I'm being a bit ambiguous. The bottom line is usually this: If you think that hiding the code is going to make a bit of difference, you're wrong, so don't bother.

There are exceptions, and you may have one, but far too often, people think of the effort they put into a program and want to protect it for that reason. Other people will see it differently, because they put no effort into it. You have to understand how and why others would steal, and what they would steal, to decide how to secure it....and that ain't easy. People steal what they perceive to be valuable. As the author, what you perceive to be valuable is likely not what a thief would perceive to be valuable, so you are likely to waste effort securing the wrong thing.