[question]userRPL, functions or (sub)subprograms and directories

[David Hayden]

One other point that I didn't see here: writing to global variables is very expensive. Because the entire contents of the HOME directory is packed tightly together, changing the size of any object means you have to move every object that comes after it. And since you have to move objects, you also have to check the stack, return stack, local variables etc for any pointers to the objects that moved and adjust them accordingly. Thus writing to local variables is much faster.