Re: very slow drawing
Rene Brun (Rene.Brun@cern.ch)
Sat, 06 Feb 1999 09:26:37 +0000
Thomas Walter wrote:
> > Let me know the result.
> >
> Here they are:
>
> Part1 of my macro fills the histograms, Part2 does some fits and in Part3
> the histograms are displayed and the ps-file is generated.
>
> These are the results for interactiv root. See the big differencies
> between the RealTime and the CPUTime in Part 3:
>
> Part 1 RealTime: 82.29 CPUTime: 79.39
> Part 2 RealTime: 1.97 CPUTime: 1.93
> Part 3 RealTime: 536.55 CPUTime: 36.53
>
> And here the results gained with root -b:
>
> Part 1 RealTime: 81.3 CPUTime: 79.8
> Part 2 RealTime: 1.99 CPUTime: 1.95
> Part 3 RealTime: 5.5 CPUTime: 4.6
>
> As you can see, the second version is a factor 10 faster than the first
> one.
>
> If I remember me correctly, this discrepancy already existed in Zuerich.
> I displayed the histograms over the ethernet-lan from one computer to
> another. So I guess, the problem isn't a slow link between Hamburg and
> Zuerich.
>
> Thomas Walter
Thomas,
As I was expecting, your problem has nothing to do with Postscript.
it is a pure X11 problem. I am aware of performance problems in case
you run on a Solaris 2.6 machine and your X server is another machine
even on the same LAN. Are you running on a Solaris machine?
If yes, this problem should be investigated. It is not a Root problem.
Ian Bird from Jefferson Lab raised this problem some time ago.
I do not know if they found a solution.
As a simple test, could you try to run Netscape on your machine in
Zuerich
and try to use it from your display in Hamburg?
Rene Brun