drw@cullvax.UUCP (02/26/87)
I'm running Emacs on Suns. When Emacs wants to scroll part of the window up or down, it is *very* slow. Is this a known problem with a known solution? And if so, what is the solution? Dale -- Dale Worley Cullinet Software UUCP: ...!seismo!harvard!mit-eddie!cullvax!drw ARPA: cullvax!drw@eddie.mit.edu
dld@theory.cs.cmu.edu.UUCP (02/26/87)
We had the same problem. The fix (sent us by RMS, I believe) is to insert some padding characters in the scrolling commands in the termcap entry. This will make emacs think that scrolling is more expensive than it had thought before (closer to its "true cost"), so that emacs will choose to redraw the screen instead. M-|sun-nic|sune|Sun console without insert chararacter:\ :ic@:im@:ei@:tc=sun: Mu|sun|Sun Microsystems Workstation console:\ :li#34:co#80:cl=^L:cm=\E[%i%d;%dH:nd=\E[C:up=\E[A:\ :am:bs:km:mi:ms:pt:\ :ce=\E[K:cd=\E[J:so=\E[7m:se=\E[m:\ :kd=\E[B:kl=\E[D:ku=\E[A:kr=\E[C:kh=\E[H:\ :k1=\EOP:k2=\EOQ:k3=\EOR:k4=\EOS:\ :al=5*\E[L:dl=5*\E[M:im=:ei=:ic=\E[@:dc=\E[P: Note on the last line the "5*" in the entries for "al" and "dl". You can either get this inserted in /etc/termcap instead of the standard entry, or you can set the environment variable TERMCAP to the string form of the above on login. I've also used the same fix for an IBM RT/PC. Life becomes much more pleasant. Dave
escott%rome.uci.edu@ICSG.UCI.EDU.UUCP (02/27/87)
You don't say what kind of Emacs (or what kind of Suns, now that I think
of it), but...
Do you have that multiple line/char insertion and deletion stuff in your
termcap? Here it is:
:AL=\E[%dL:DL=\E[%dM:IC=\E[%d@:DC=\E[%dP:
By the way, Jeff Peck <peck@sun.com> has some very great stuff for
GNU Emacs on the Suns, if you'd like to contact him.
+-------------------------------------------------------------------------+
Scott Menter UCI ICS Computing Support Group Univ. of Calif. at Irvine
(714) 856 7552 Irvine, California 92717
Internet: escott@ics.uci.edu UUCP: ...!ucbvax!ucivax!escott
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+-------------------------------------------------------------------------+merlin@hqda-ai.UUCP (02/27/87)
Emacs scrolls slowly on a Sun. No, that's not a problem,
it's due to the (incredible) overhead of the Sun's (incredible)
display. You pay a price for all those pixels.
Yes, there is a known cure. RMS extended the termcap
definitions a bit. Here's my termcap:
Mu|sun|Sun Microsystems Workstation:\
:bs:ta:am:km:mi:ms:pt:\
:li#34:co#80:\
:bl=^G:vb=\E[q\200\200\200\200\200\200\200\200\200\200\E[p:\
:cl=50\f\E[J:cd=50\E[J:\
:up=\E[A:do=\E[B:nd=\E[C:\
:kd=\E[B:kl=\E[D:ku=\E[A:kr=\E[C:kh=\E[H:\
:cm=25\E[%i%d;%dH:ho=25\E[H:\
:ce=25\E[K:al=\E[L:dl=\E[M:\
--=> :AL=\E[%dL:DL=\E[%dM:\
:ic=\E[@:dc=\E[P:\
:so=\E[7m:se=\E[0m:\
:ul=\E[7m:ue=\E[0m:\
:is=\E[s:\
:rs=\E[s\f:
The indicated line is RMS's extensions. These are multi-line
adds and deletes. They take one parameter, like "cm". This works
on v18 emacs, but I'm not sure about earlier versions. I haven't
seen any standard program that gets messed up by this.
--
David S. Hayes, The Merlin of Avalon
PhoneNet: (202) 694-6900
ARPA: merlin%hqda-ai.uucp@brl.arpa
UUCP: ...!seismo!sundc!hqda-ai!merlingordon@warwick.UUCP (Gordon Joly) (03/07/87)
In article <307@hqda-ai.UUCP> merlin@hqda-ai.UUCP (David S. Hayes) writes: > > Emacs scrolls slowly on a Sun. No, that's not a problem, >it's due to the (incredible) overhead of the Sun's (incredible) >display. You pay a price for all those pixels. >[...] >--=> :AL=\E[%dL:DL=\E[%dM:\ >[...] I have not seen this fix in action, (above is just one line from the original posting). But in my *experience*, the updating is carried out in very unoptimal way, a process which I describe as shunting. It really does not have a lot to do with the overhaed. If you do set term=vt100 setenv TERM vt100 unsetenv TERMCAP etc, (ie pretend the screen is a vt100) the process of scrolling speeds up. Of course, other features like the status line, get messed up. Moral. SUN's termcap entry for `sun' is wrong. Gordon Joly -- {seismo,ucbvax,decvax}!mcvax!ukc!warwick!gordon