Re: Plotting with 3.2.0 on Windows is SLOOOOOOWWWW

[Tatsuro MATSUOKA]

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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