Re: [TUHS] Un-released/internal/special UNIX versions/ports during the years?

Angelo Papenhoff <aap(a)papnet.eu> wrote: Woops replied off list as well... Angelo Papenhoff <aap(a)papnet.eu> wrote: LISP a Unipress asked RMS to rewrite the screen update code before distributing it as GNU emacs or they will sue RMS. It is not clear how much of the code was really rewritten. What I can tell is that the GNU emacs uses a screen update that is as slow as the original code from Gosling that Gosling took from another own project - an ASCII art editor that needed to be able to handle more than one simultaneous change at a time. My background is that I did a lot of benchmarking on Gosling Emacs, GNU Emacs, vi and my VED around 1985. It turned out that RMS may have rewritten the code but did not change the algorithm. My own screen update from VED is much faster even though it can only handle either a single deletion or a single insertion at a time. Changes are implemented as a delete operation followed by an insert operation ahd this turns out to be much faster than what emacs does. BTW: one reason why emacs is slow is that the status line is at the bottom rather than being the top line as in VED. If you use emacs on a real terminal, you see the status line hopping... The oldest changelog file in GNU emacs claims on the bottom line something like: "Now all Gosling code has been rewritten". Given the fact that the screen update still basically uses the same algorithm, it is not clear what this statement means. Jörg -- EMail:joerg@schily.net (home) Jörg Schilling D-13353 Berlin joerg.schilling(a)fokus.fraunhofer.de (work) Blog: http://schily.blogspot.com/ URL: http://cdrecord.org/private/ http://sourceforge.net/projects/schilytools/files/