Re: .oct function vs external program and text file exchange

[Daniel Arteaga]

Al 14/01/11 17:22, En/na Przemek Klosowski ha escrit:

> Your workflow goes through five phases:
>
> - writing of parameters in Octave,
> - system() overhead of starting your executable,
> - reading of data in your C++ code,
> - calculation,
> - output in C++ and input in Octave.
>
> The actual amount of time spent in each one depends on your particular
> case, e.g. how much data is involved. Doing it in an .oct function would
> essentially reduce it to the calculation, and you can find out exactly
> how much time it takes by modifying your C++ to calculate and print the
> time from after reading the data to just before writing it out. Then,
> wrap your Octave code to write the params, call system() and read the
> results in the tic/toc pair, and subtract the C++ time from the
> toc() value---it'll be your overhead.

Thanks for your suggestions. I measured it, and the overhead it is 
around 8 ms (Core 2 Duo @ 3 GHz). The amount of exchanged data is fairly 
small (around 20 lines of text).

Daniel