[Insight-users] Speed: Is this the right way?

[Koen Vermeer]

Hi Luis,

Thanks for the tips. 1 gave a small speed increase, but only in the
order of 10%. For my test case, the time to beat is still about half of
the current running time - I don't anticipate that kind of speedup by
compiler optimization.

Anyway, I'll continue exploring ITK and asking questions on the list!

Best,
Koen


On Wed, 2008-10-29 at 06:50 -0400, Luis Ibanez wrote:
> 
> Hi Koen,
> 
> 
> 1) The option "-O" doesn't give you all the optimization that you
>     need for instantiating many inline templated methods.
> 
>     Please use "-O3" to make sure that templated code gets optimized.
> 
> 
> 2) DisconnectPipeline() is not discussed in the Software Guide.
>     Despite its usefulness, it is not considered to be the normal
>     way of using the pipeline.
> 
>     Please note that given the extent of ITK, it is not realistic
>     to cover every single topic in the Software Guide. The book
>     probably covers about 30% of the toolkit capabilities, and
>     it is already ~800 pages.
> 
> 
> 3) DisconnectPipeline() makes possible for the output image of
>     a filter, to stay alive after you destroy the filter that
>     created the image.  It also makes possible to reuse a filter
>     to make it produce N variations of an output image.
> 
> 
> 4) As described in the Welcoming package
>     http://www.itk.org/HTML/Welcome.htm
> 
>     The best process for learning ITK is to
> 
>      a) read the Tutorials
>         http://www.itk.org/HTML/Tutorials.htm
> 
>      b) read the ITK software guide
>         http://www.itk.org/ItkSoftwareGuide.pdf
> 
>      c) ask questions in the mailing list
> 
> 
> 
> 
>    Regards,
> 
> 
>        Luis
>