user30341: I tend to leave old code around as comments until I am sure that my current version is stable.  Just the way I like working.  I am concerned that I may be unnecessarily bloating up my sketches.
Do comments occupy space in an Arduino IDE compiled C++ sketch for Arduino (Nano, Uno)?  Is it correct to suppose that the behavior would be the same for NodeMCU?

user33871: No.  Comments don’t take up any space.  

user313: The C/C++ processor (which processes only the #define & #include statements) is the first stage of the compilation process. It runs before the compiler does and strips out everything that isn't code. The compiler will never see your comments.

30341: <p>I tend to leave old code around as comments until I am sure that my current version is stable.  Just the way I like working.  I am concerned that I may be unnecessarily bloating up my sketches.</p>

<p>Do comments occupy space in an Arduino IDE compiled C++ sketch for Arduino (Nano, Uno)?  Is it correct to suppose that the behavior would be the same for NodeMCU?</p>
 33871: <p>No.  Comments don’t take up any space.  </p>
 313: <p>The C/C++ processor (which processes only the #define &amp; #include statements) is the first stage of the compilation process. It runs before the compiler does and strips out everything that isn't code. The compiler will never see your comments.</p>
