Re: X11, VNC performance (was: Linux-Outlook (ouch) question)
On Fri, 5 Apr 2002, Benjamin Scott [EMAIL PROTECTED] wrote: Karl Runge is on the right track. X is very senstive to latency. The bandwidth requirements can actually be fairly minor for simple constructs (e.g., a GNU Emacs window), but a high-latency link will kill you. Yes, and I wanted to point out that tcl/tk apps (like exmh) and big motif-ish apps (like netscape) usually become unbearable under dialup-level latency (100-300ms). OTOH, I find the response of lightweight gui X apps (e.g. Xaw based ones like my mail reader) to be acceptable under most conditions. Then again, having used remote computers almost daily for the past 18 years has likely made me very patient wrt interactive response :-) I did an exmh test just now to a ssh/vnc landing pad I have in the west coast (120ms ping times from here): exmh thru a ssh X redir (no vnc) was OK for the changing text, but the gui widget aspects (dialog popups, menus, etc) were painfully slow (e.g. often 2-6 secs to map the new windows). exmh via vnc on the ssh link had much better response (e.g. 1 sec to map the new windoes), most all aspects seemed tolerable/usable. (it goes w/o saying no fancy backgrounds or polished metal, translucifying, wm's for the vnc session (I use fvwm + solid bg)) Of course the response will never be as good as running exmh on the local box, but I am firm believer in stretching my MUA's view of my mail over to my remote location (the fastest being ssh + a cmdline MUA, like pine), rather than teeing my mailbox to my remote location. But, of course, YMMV. * To unsubscribe from this list, send mail to [EMAIL PROTECTED] with the text 'unsubscribe gnhlug' in the message body. *
Re: X11, VNC performance (was: Linux-Outlook (ouch) question)
dxpc will speed things up even more. dxpc compresses the X *protocol* that gets you more then compressing the bits. Here's some directions I wrote to remind myself: - remotely working on a laptop login to work system set display to laptop's IP dxpc -f set display to work system:8 on laptop: dxpc -f work system back on work system run X apps to display on laptop - I used to use term once upon a time too. You have to modify your app to do that. Those days are over thanks to things like slirp (a slip emulators). Karl J. Runge said: I did an exmh test just now to a ssh/vnc landing pad I have in the west coast (120ms ping times from here): exmh thru a ssh X redir (no vnc) was OK for the changing text, but the gui widget aspects (dialog popups, menus, etc) were painfully slow (e.g. often 2-6 secs to map the new windows). exmh via vnc on the ssh link had much better response (e.g. 1 sec to map the new windoes), most all aspects seemed tolerable/usable. (it goes w/o saying no fancy backgrounds or polished metal, translucifying, wm's for the vnc session (I use fvwm + solid bg)) -- --- Tom Buskey * To unsubscribe from this list, send mail to [EMAIL PROTECTED] with the text 'unsubscribe gnhlug' in the message body. *
Re: X11, VNC performance (was: Linux-Outlook (ouch) question)
On Sun, 7 Apr 2002, at 8:11pm, Tom Buskey wrote: dxpc will speed things up even more. dxpc compresses the X *protocol* that gets you more then compressing the bits. We're not talking about size-of-transactions here but the sensitivity to latency -- which, roughly speaking, might be measured by the number-of-transactions. Does dxpc do anything about that? -- Ben Scott [EMAIL PROTECTED] | The opinions expressed in this message are those of the author and do not | | necessarily represent the views or policy of any other person, entity or | | organization. All information is provided without warranty of any kind. | * To unsubscribe from this list, send mail to [EMAIL PROTECTED] with the text 'unsubscribe gnhlug' in the message body. *
Re: X11, VNC performance (was: Linux-Outlook (ouch) question)
Benjamin Scott said: On Sun, 7 Apr 2002, at 8:11pm, Tom Buskey wrote: dxpc will speed things up even more. dxpc compresses the X *protocol* that gets you more then compressing the bits. We're not talking about size-of-transactions here but the sensitivity to latency -- which, roughly speaking, might be measured by the number-of-transactions. Does dxpc do anything about that? I believe it does. It does caching at either end also. http://www.linuxjournal.com/article.php?sid=2374 http://www.vigor.nu/dxpc/ -- hard to find DXPC home page In any event, it is better then SSH compression alone. I imagine it can be combined with VNC too. -- --- Tom Buskey * To unsubscribe from this list, send mail to [EMAIL PROTECTED] with the text 'unsubscribe gnhlug' in the message body. *
Re: X11, VNC performance (was: Linux-Outlook (ouch) question)
On Sun, 2002-04-07 at 21:46, Tom Buskey wrote: http://www.vigor.nu/dxpc/ -- hard to find DXPC home page It can't be that hard to find when its the first result on google :) Adam * To unsubscribe from this list, send mail to [EMAIL PROTECTED] with the text 'unsubscribe gnhlug' in the message body. *
