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Re: Glacially slow X performance

An application I used to run on a remote machine finally built a GUI which could be displayed on the local desktop using X windows. I I ran it sitting at the console of the remote machine (by walking over to the other building), performance was fine. But displayed on my office using X windows it was dismal.

It had nothing to do with the speed of the local machine, and everything to do with how the vendor designed the app.

Currently, remote X for everything I do runs at very good speeds. On the LAN at work, basically "instantaneous". From home over Comcast some things are noticeably slower, but still reasonable.

My best guess is that "smart", whatever it is, requires something of the X Server that Apple's X11 doesn't implement -- maybe some smarter way of talking to the hardware? -- and that lack is causing the slowdown. That would indeed be disappointing.

-Don

At 2:09 PM -0600 4/23/07, Nathan wrote: 
What's "smart --gui"?

Why do you expect something that you run on a remote linux server to
finish quicker because of a faster local machine?  (That's a real
question)  I would expect a "remote" app to be bottlenecked by the
speed of the remote machine or the speed of the network.

In general, the best way to get a networked service to work faster is
to increase the speed of your network.  AFAIK, the networked part of X
was designed for local-networks, and is very latency sensitive, so
it's not just bandwidth you have to worry about.  For X, as I
understand it, all the bandwidth in the world won't help you if you've
got a 250ms latency.

~ Nathan

On 4/23/07, James Rome <email@hidden> wrote: 
I am new to the Mac world--I got the latest 8 cpu MacPro and expected it
to rock.

But, trying both XDarwin and the Apple X11 on the install CD, I get
glacially slow performance. It took over 3 hours to finish running
"smart --gui"  on a remote Linux machine!

I have a fast Comcast internet connection (8 Mbps down and 750 kbps up).

This looks to me like the performance I used to get on Windows using
Xwin-32 before they implemented support for the render extension.

Am I doing something wrong? Is there a better way to get remote X to
work at reasonable speeds?

Thanks for the help,
Jim Rome
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--
--------------------------------------
Don MacQueen
Environmental Protection Department
Lawrence Livermore National Laboratory
Livermore, CA, USA
--------------------------------------
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References: 
 >Glacially slow X performance (From: James Rome <email@hidden>)
 >Re: Glacially slow X performance (From: Nathan <email@hidden>)



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