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On 2007-05-21, Hans-Werner Hilse <hilse@×××.de> wrote: |
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> Hi, |
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> |
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> On Mon, 21 May 2007 17:22:39 +0000 (UTC) Grant Edwards |
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><grante@××××.com> wrote: |
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> |
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>> > However, the usual way to use remote X-based programs is just to let |
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>> > SSH do that. It can provide a tunnel for X. This is especially easy |
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>> > if the remote SSH server daemon has set its "X11Forwarding" |
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>> > configuration setting set to "yes" (otherwise, it is really a bit |
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>> > harder and not suggested). Then, you just would connect using "ssh |
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>> > -X user@host" and that's it, SSH will care for creating a socket on |
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>> > the remote machine and set the DISPLAY variable accordingly. |
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>> |
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>> NB: I've found that using -Y instead of -X can speed up some |
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>> applications by a factor of 50 or more. |
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> |
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> well, I don't doubt you did experience it, but it sounds quite |
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> unlikely (or like a bug). To be a bit picky: How did you |
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> measure that factor? |
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With a stopwatch. I timed how long the initial window took to |
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draw, how long it took to redraw after an expose event, how |
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long a dialog box took to appear, etc. Using -X, the times |
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were 1-2 minutes. Using -Y, they were was 1-3 seconds. |
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This was through a 1Mbps link with about 40ms of latency. |
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> But you're right: In fact, some applications will probably work better |
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> in "trusted" mode (see "ForwardX11" in ssh_config(5)). However, usually |
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> applications are not supposed to behave in a way where -Y (i.e. |
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> trusting all and everything) has improvements... |
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It made a big difference on all apps I tested, and a _huge_ |
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difference on GTK apps. The improvement on GTK apps was |
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probably 10X the improvement for Motif or Athena apps. |
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-- |
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Grant Edwards grante Yow! I just heard the |
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at SEVENTIES were over!! And |
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visi.com I was just getting in touch |
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with my LEISURE SUIT!! |
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-- |
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