RE: Plotting with 3.2.0 on Windows is SLOOOOOOWWWW

[Tatsuro MATSUOKA]

Sorry

I have manually change the code
and 
> > !         if (isempty (str))
Is forgotten.

octave.exe:11>for i = 1:n*m
>     x = rand (2,N);
>     subplot (n,m,i);
>     plot (x(1,:),x(2,:));
> end
octave.exe:12>cputime()-ts
ans =  0.76563
octave.exe:13>
octave.exe:13>N = 100;
octave.exe:14>n = 2;
octave.exe:15>m = 2;
octave.exe:16>tic
octave.exe:17>for i = 1:n*m
>     x = rand (2,N);
>     subplot (n,m,i);
>     plot (x(1,:),x(2,:));
> end
octave.exe:18>toc
Elapsed time is 3.2813 seconds.

cputime is surely reduced on the computer in my university (cpu is HT-pentium).

I will test again at home.

Regards

Tatsuro 
I will check again at home

Regards.


--- Tatsuro MATSUOKA wrote:

> Hello
> 
> --- Olli Saarela  wrote:
> 
> > I was looking for a CPU consuming loop in the C++ code, but there might
> > actually be some in the script files. Does this help?
> > 
> > *** __gnuplot_get_var__.m~      Tue Jun  9 23:22:14 2009
> > --- __gnuplot_get_var__.m       Mon Aug  3 13:52:35 2009
> > ***************
> > *** 125,135 ****
> >         fflush (ostream);
> > 
> >         str = {};
> >         while (isempty (str))
> >           str = char (fread (istream)');
> > !         if (! isempty (str))
> >             str = regexp (str, "OCTAVE:.*", "match");
> >             str = str{end}(8:end);
> >           endif
> >           fclear (istream);
> >         endwhile
> > --- 125,137 ----
> >         fflush (ostream);
> > 
> >         str = {};
> >         while (isempty (str))
> >           str = char (fread (istream)');
> > !         if (isempty (str))
> > !           sleep(0.05);
> > !         else
> >             str = regexp (str, "OCTAVE:.*", "match");
> >             str = str{end}(8:end);
> >           endif
> >           fclear (istream);
> >         endwhile
> > 
> > 
> > On my multicore machine the tic-toc timing is practically the same, but
> > cputime() shows a significant speed-up.
> > 
> 
> First 
> > !         if (isempty (str))
> > !           sleep(0.05);
> > !         else
> 
> I have tested on computer in my home (cpu Celerron M 1.3GHz)
> Why 'else' is here? 
> With this 'else' plot was failled.
> 
> I remove 'else' and tested argument of sleep from 0.05 to 1 with task manager 
> active.
> Octave consumed 99% cpu time while loop of this test. 
> 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
> 
> 
> Regards
> 
> Tatsuro
> 
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