[Insight-users] My median + gradient-anisotropic-diffusion filter became 200% slower when I updated ITK

[Magnotta, Vincent A]

Robert,

Was ITK built in release mode in both cases? You might expect similar
timing measures if the new download was built in Debug mode while the
previous version was built in Release mode.

Vince

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Department of Radiology
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On 3/16/11 7:48 AM, "Robert.Atwood at diamond.ac.uk"
<Robert.Atwood at diamond.ac.uk> wrote:

>Hi,
>I've installed version 3.2 from GIT recently, and suddenly my fairly
>simple volume median + gradientAnisotropicDiffusion program became 100%
>slower. It could be a large issue because I want to apply this filter to
>a LOT of data! I suppose I can just use the old version, but is something
>wrong with it? Why is it acting differently !?! The results look the same
>to me.
>
>I also therefore came to observe that the newer code (using git) lacks
>the automatic version string that was included in the older code (using
>cvs).
>
>Does anyone have any idea why it's taking so much longer? Thanks
>Robert
>
>
>
>*** old header:
>/*========================================================================
>=
>
>  Program:   Insight Segmentation & Registration Toolkit
>  Module:    $RCSfile: itkGradientAnisotropicDiffusionImageFilter.h,v $
>  Language:  C++
>  Date:      $Date: 2008-10-16 16:45:08 $
>  Version:   $Revision: 1.28 $
>
>*** new header:
>/*========================================================================
>=
>
>  Program:   Insight Segmentation & Registration Toolkit
>  Module:    itkGradientAnisotropicDiffusionImageFilter.h
>  Language:  C++
>  Date:      $Date$
>  Version:   $Revision$
>
>
>
>******************************
>Timing the old build:
>
>[kny48981 at cs04r-sc-com03-01 test_rad_iter]$ time
>/home/kny48981/progs/itk_progs/build64/itk_med_rca from-mhd.in >& old.out
>
>real    0m44.201s
>user    0m58.038s
>sys     0m16.811s
>
>simpleFilterWatcher said:
>
>
>Filter took 0.506844 seconds.
>-------- End MedianImageFilter "VolMedian"...
>
>Filter took 19.1144 seconds.
>-------- End GradientAnisotropicDiffusionImageFilter "SmoothFilter"
>
>
>*******************************
>
>Timing the new build:
>
>[kny48981 at cs04r-sc-com03-01 test_rad_iter]$ time
>/home/kny48981/progs/itk_progs/build-64-3.20/itk_med_rca from-mhd.in >&
>new.out
>
>real    1m55.548s
>user    3m32.898s
>sys     0m16.619s
>
>
>simpleFilterWatcher said:
>
>Filter took 2.9052 seconds.
>-------- End MedianImageFilter "VolMedian"
>
>Filter took 78.1621 seconds.
>-------- End GradientAnisotropicDiffusionImageFilter "SmoothFilter"
>
>
>
>
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