[Vince]

I don't think they have any impact on performance, but since the names of public functions are stored in memory this might result in increased memory usage. A function should only be public if either:

• It is a callback
• It is called by a timer
• It is called by CallLocalFunction
• It is called by CallRemoteFunction

In any other case it's unnecessary. If you used a tool to count them then keep in mind that ZCMD commands are also public functions because ZCMD uses CallLocalFunction in the background.