Re: Plotting with 3.2.0 on Windows is SLOOOOOOWWWW

[Tatsuro MATSUOKA]

Hello

Hmmmmm! 

The slowness seem to strongly depends on the system.

In the test previous post performed on the computer in my home (Windows XP home 
Cereron M 1.2Ghz 512Mb
Memory).
I have tested the same tests by Matthias Brennwald on the computer the 
university (Windows XP
professionan HT Pentium 3.4GHz 1GB Memory)

The speed of the tests on the octave 3.2 (3.2.0 MinGW distributed on the 
OctaveForge and Octave 3.2.2
built myself)is comparable to octave 3.0.5 MinGW distributed on the 
OctaveForge).
Of course the result for 3.0.5 is faster than that ion the computer in mu home. 
 However it is
reasonable to the different in CPU performance.  However the difference octave 
3.2 on MinGW is too big
to attribute the cpu performance.

 
Note that I do not use John's patch for this test.

For the computer in my university, the John's patch seem to be not needed.
I will test again when I return to my home.

Hello Matthias Brennwald

Can you perform the test with John's patch by yourself?

Regards

Tatsuro

 
--- Tatsuro MATSUOKA  wrote:

> Hello
> 
> MMMMM It is really slow as you pointed out
> 
> On my machine, which is perhaps older machine than yours.
> For the first plot,
> On octave 3.2.0 on windows   it took about 6  minutes to plot.
> On octave 3.2.2 on windows,  it took about 5  minutes to plot. (Built on 
> MinGW  by myself)
> On octave 3.2.0 on cygwin,   it took about 17 seconds to plot.
> On octave 3.0.5 on windows,  it took about 10 seconds to plot.
> On octave 3.0,3 on cygwin,   it took about 10 seconds to plot.
> 
> After plot was done, I cleared the plot by clf and tested again
> On octave 3.2.0 on windows   it took about 5  minutes to plot.
> On octave 3.2.2 on windows,  it took about 6  minutes to plot. (Built on 
> MinGW  by myself)
> On octave 3.2.0 on cygwin,   it took about 1  seconds to plot.
> On octave 3.0.5 on windows,  it took about 3  seconds to plot.
> On octave 3.0.3 on cygwin,   it took about 2  seconds to plot.
> 
> First time plot perhaps includes time to establish to connect to gnuplot.
> For cygwin the time for second plots seemed to be not so slow.
> For octave 3.0,5 on windows, the second plot was slower than that on cygwin 
> but it is practical
> level.
> However for 3.2 for windows, the plots are too slow.  The overhead time for 
> first plot is not
> problem
> for this issue.
>   
> 
> The pipe on windows seems slower than that on Unix.
> However it is too slow for octave 3.2 on MinGW.
> Plot on octave 3.2.0 on cygwin is slower than that on 3.0.3 on cygwin, 
> however the slowness
> within 
> two times and the second plot, the plot time is comparable that on octave 
> 3.0.3.
> 
> Therefore this issue particularly is serious for octave 3.2 on windows.
> Perhaps some codes newly imported in octave 3.2 gives slowness on the plot on 
> the 3.2 for
> windows.
> 
> Perhaps this problem is beyond my ability, please use octave 3.0.5 on windows 
> or octave 3.2.0 on
> cygwin-1.7.
> 
> For octave 3.2, cygwin version is much stable that that on windows.  I myself 
> do not use octave
> 3.2.0
> on windows but use octave-3.0.5 on windows or octave 3.2,0 on cygwin-1.7.
> 
> Regards
> 
> Tatsuro 
>  
> --- Mathias Brennwald <address@hidden> wroten 
> 
> > Dear all
> > 
> > Consider the following code:
> > 
> > -----------------
> > N = 100;
> > n = 2;
> > m = 2;
> > tic
> > for i = 1:n*m
> >      x = rand (2,N);
> >      subplot (n,m,i);
> >      plot (x(1,:),x(2,:));
> > end
> > toc
> > -----------------
> > 
> > Executing this with Octave 3.2.0 on my MacBook running on Mac OS X,  
> > the tic/toc timing reports about 0.06 seconds, and it takes about 1  
> > second until all plots are displayed (using gnuplot). Doing the same  
> > on the same machine with Windows results in a tic/toc time of about  
> > 0.1 seconds, but the plots take more 5 minutes to appear.  The same  
> > happens on a 'real' Windows machine. I don't think this is how it  
> > should be, so I guess I might be doing something wrong.
> > 
> > I need to produce many such plots on a Windoze system. Is there  
> > anything I can do to speed things up?
> > 
> > Matthias
> > 
> > 
> > ----
> > Matthias Brennwald
> > Eawag, CH-8600 D将臙endorf
> > Office BU-C08: +41 44 823 53 05
> > Lab LA-C76: +41 44 823 53 06
> > address@hidden
> > 
> > 
> > 
> > ----
> > Matthias Brennwald, K将」ferholzstrasse 173, CH-8046 Z将舐ich, +41 44 364  
> > 17 03
> > 
> > > _______________________________________________
> > Help-octave mailing list
> > address@hidden
> > https://www-old.cae.wisc.edu/mailman/listinfo/help-octave
> > 
> 
> 
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