Thanks for your response, Dean. I am using -cc 3, but it's unlikely that the app is doing ColourMap modifications in this case. The gui control is probably one of JTextComponent's subclasses. When I double-click a word, its text and background colours change to the highlight colours, as is typical with any wysiwyg editor. In VNC this translates to a massive update, probably implying that the whole component area is updated from the application, where I think only the rectangle containing the word should update, as occurs with the other app, NetBeans.
Can you refer me to a description of -cc 3 ? Thanks again! [EMAIL PROTECTED] wrote: > > When you run with -cc 3 and the application changes the ColourMap to do > highlighting or blinking or whatever, then VNC does a whole screen update. The > highlighting or blinking won't work at all if you don't use -cc 3, however. It > will work properly with -cc 3 and the Unix vncviewer running with a colourmap > (vncviewer -owncmap -depth 8). The windows and java viewers don't do colour > maps. > > There was some discussion about this a few months ago, and it was thought that > some more intelligent updating could be done, but nothing has happened so far. > > Dean > |--------+-----------------------> > | | Russ Ferriday@russ | > | | | > | | 10/30/01 04:55 PM | > | | | > |--------+-----------------------> > >----------------------------------------------------------------------------| > | | > | To: vnc-list@[EMAIL PROTECTED]@SMTP@CGY-EXCHANGE | > | cc: | > | Subject: Poor performance on a specific app (Together/J) under | > | VNC | > >----------------------------------------------------------------------------| > > > > I would appreciate any suggestions regarding a performance problem I'm > having. > > Background: > We develop Java apps using Together/J and NetBeans running on a dual > Pentium 1GHz with 1GB RAM, with Linux 7.1. We have vnc 3.3.3r2 and start > the server like this... > vncserver -cc3 -geometry 1600x1200 > Classic VNC setup, just switched to KDE as window manager. Very happy in > general. > > Reference point: > Under KDE or FVWM2 on the console Together/J and Netbeans work fine. > Fast response, no problems. > > Problem under VNC: > Together/J runs pretty poorly when editing code, selecting text with a > double click, etc. > However Netbeans runs fine - very fast. > > Easy to see why once you fire up Ethereal... > There is vastly more network traffic with Together/J than with Netbeans > on similar work. Highlight a word and Together/J updates a whole text > control sending 1.3MB of data to the viewer, where Netbeans sends less > than 100KB. > > Short of rewriting Together/J, and all the performance suggestions in > the FAQ, are there any options for working around the problem? It seems > that the update to the large text control causes masses of redundant > data to traverse the network, when actually only the highlighting on a > word has changed. This is counterintiuitive to me, and I would not have > expected only pure framebuffer changes to be relayed. Another piece of > information, it seems that the text background ends up with some > dithering on it that we are unable to eliminate. This would explain why > the encoded area takes up 1.3MB. > > Thoughts? > > -- > =========================================================== > Russ Ferriday (805) 543-4895 x206 > Chief Technical Officer > Focus Learning Corporation > San Luis Obispo, CA > --------------------------------------------------------------------- > To unsubscribe, mail [EMAIL PROTECTED] with the line: > 'unsubscribe vnc-list' in the message BODY > See also: http://www.uk.research.att.com/vnc/intouch.html > --------------------------------------------------------------------- > > > > > -- =========================================================== Russ Ferriday (805) 543-4895 x206 Chief Technical Officer Focus Learning Corporation San Luis Obispo, CA --------------------------------------------------------------------- To unsubscribe, mail [EMAIL PROTECTED] with the line: 'unsubscribe vnc-list' in the message BODY See also: http://www.uk.research.att.com/vnc/intouch.html ---------------------------------------------------------------------
