I've read a lot of discussions here and elsewhere about creating a child theme being the recommended way to create a theme based on some other existing theme.
I'd like to know about possible performance disadvantages of such approach, compared to creating a non-child theme.
It seems that a parent-and-child-theme approach has to deal with loading a hell of a lot more files than a single theme – unless I'm missing something in the codex explanation. And if so, it has to slow down loading, probably significantly.
I would appreciate if someone could clarify this for me.