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From: teg@orc.olivetti.com (Tom Griner)
Newsgroups: comp.emacs
Subject: GNU Emacs 18.52 slow on Color 386i
Message-ID: <38008@oliveb.olivetti.com>
Date: 16 Feb 89 23:42:10 GMT
Sender: news@oliveb.olivetti.com
Reply-To: teg@orc.olivetti.com (Tom Griner)
Organization: Olivetti Research Center, Menlo Park, CA
Lines: 19

I have been using GNU emacs 18.52, and have found that it is
upsettingly slow when used on SUNs with color frame buffers
(386i cgthree, 3/160c cgfour) because of its tendancy to
try and scroll things backwards when moving through text.
The --**-Emacs:----- line jumps up the screen very slowly, then
it eventually scrolls back down and fills in the changed info
on the screen.  I can see why it would do this: On older serial
(9600 baud) terminals it would be faster to try and use escape
sequences to move lines around the screen then to redraw 
the same line in a new position.  But, on the color SUNs the
scroll routines are much slower than the character draw
routines.  Is there a mode I can set, or documented change
to the source code to fix this problem?
	Please e-mail directly
		teg@orc.olivetti.com
Tom Griner    {decwrl, ucbvax, ...}!orc.olivetti.com!teg    frames 2 /dev/fb
TEG@Bionet-20.bio.net                  presto.ig.com!teg    flames 2 /dev/null
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