Re: SSH GUI slow

On Wed, 14 May 2008 12:53:53 GMT curt <97WideGlide@xxxxxxxxxxxxxxx> wrote:

| Ugh, I'm sorry, I'm probably not describing the situation very well.
| When I said it takes 2 seconds to start up, I meant that the total
| startup time was 2 seconds. I should have described just the time it
| takes to redraw the screen.
|
| If I'm not using "ssh -X" and I simply minimize the Matlab window and
| then unminimize it again, redrawing is instantaneous. The screen pops
| right back up. However, when I am using "ssh -X" (even on the local
| system) it takes 8-9 seconds to just redraw the screen. I get the
| outline of the window but the contents don't appear and the window
| doesn't accept input for a while. My question is how can this
| application be slowed down this much just from using ssh ? And a second
| question is what tools are available to me to find out exactly where the
| bottle neck is ?

One "tool" is to try a faster CPU. If a faster CPU handles this quicker, the
CPU utilization is at least one bottleneck.

You can gain some network performance by having it all on the same machine.
But you in turn lose CPU because you are doing both the encryption as well
as the decryption on the same machine, needing even more of its CPU speed.
Trying this between two like machines may help give some insight.

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| Phil Howard KA9WGN (email for humans: first name in lower case at ipal.net) |
.

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