plot() is very slow in Octave 3.0.1, but OK in Octave 2.1.73

[Tatsuro MATSUOKA]

Hello David

> I use mandriva.. The change between Octave 2.1.73 and 3.0.1 that 
> probably is the cause of the slow up is that the 2.1.73 version of 
> Octave used temporary files to talk to the gnuplot process, whereas the 
> new version uses pipes.. I suspect that the posix layer that cygwin uses 
> to emulate posix pipes on a windows machine is slow. This is why the 
> mingw binary of Tatsuro is so much faster as it doesn't have this layer..

I have talk with my cygwin binary but not that of mingw.

I do not understand why every plot takes 10 seconds for Milan.
My example first plot is slow but second, third ... plots are relatively faster than the first.
Perhaps something is wrong in his cygwin system.

The reponse speed difference is the gnuplot I have prepared is special version.
I used the gcc-4.3.1 that I have built on cygwin with optimzing by -O3 -fomit-frame-pointer.

The response speed my gnuplot of cygwin is as fast as windows native version.
That's why octave plot is relatively faster than that of official distributed.

Regards

Tatsuro

 

 


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