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

Wed Mar 16 10:24:16 EDT 2011

Thanks, Vincent. Certainly worth double checking, but no, it's definitely 'release' in the build that's the slow result:

Further, I did check by subtracting results, I get identically zero so there's no change in the result of running the filter pipeline.

 BUILD_DOXYGEN                    OFF
 BUILD_EXAMPLES                   OFF
 BUILD_SHARED_LIBS                ON
 BUILD_TESTING                    OFF
 CMAKE_BACKWARDS_COMPATIBILITY    2.4
 CMAKE_BUILD_TYPE                 Release  
 CMAKE_INSTALL_PREFIX             /dls_sw/apps/itk/itk-3.20

...

> -----Original Message-----
> From: Magnotta, Vincent A [mailto:vincent-magnotta at uiowa.edu]
> Sent: 16 March 2011 13:24
> To: Atwood, Robert (DLSLtd,RAL,DIA); insight-users at itk.org
> Subject: Re: [Insight-users] My median + gradient-anisotropic-diffusion
> filter became 200% slower when I updated ITK
> 
> 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
> 
> --
> Associate Professor
> Department of Radiology
> 0453-D JCP
> 200 Hawkins Drive
> Iowa City, IA 52242
> E-mail: vincent-magnotta at uiowa.edu
> Phone: 319-356-8255 Fax: 319-353-6275
> Website: http://www.healthcare.uiowa.edu/Radiology
> 
> 
> 
> 
> 
> 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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