🚀 go-pugleaf

	Hi all,
as requested I post a summary of answer received.
Some persons have pointed out that curses do all (or near all) the
possible optimizations, and I have verified that it's true (obviously
when I made the same test sometimes ago, I was perhaps drunk).

	For changing a screen appearance into another one it's sufficient to
modify the screen area using standard curses function (or changing directly
scr->_y and then call touchwin(scr)) and call wrefresh(scr).

	The residual problem is about character attribute and eight bit
character set, in fact BSD curses handles only the _STANDOUT attribute,
and both BSD and SYSV curses don't handle eight bit characters.
As I need to handle both the above things (as well as status line update)
I need a free curses implementation to customize to my needs.
Thanks to everyone Emailing me a pointer to that.

                                          Roberto

P.S. Sorry for the delay, I've had a lot of troubles.