Hans,
I have see a single per-pixel dynamic memory/malloc cause a 10X performance penalty. Also I have found apple Instruments easy for diagnosing this bottle neck. This is one possibility among many. Good luck tracking down the issue. Brad On Apr 16, 2014, at 9:10 PM, Johnson, Hans J <[email protected]> wrote: > FYI > > Ali Ghayoor did the following experiments on > "BRAINSFitTest_BSplineScaleRotationRescaleHeadMasks" test. > > 1) In one of my old build directories, I ran the > "BRAINSFitTest_BSplineScaleRotationRescaleHeadMasks" test in BRIANSFitv3 > (that uses ITKv3 registration framework). The test was passed successfully in > both release and debug types, and it took: > > 22 second in release > 88 second in debug > > 2) I built NAMICExternalProject on my system in release type and ran the > above BSpline test in BRAINSTools. The test was passed successfully again, > but the run time in ITKv4 is tremendously longer than the time that test > takes in ITKv3. The test took: > > 18 minutes using 4 cores > 22 minutes using 1 core (In this case the environmental variable "NSLOTS" is > set to 1). > > ================================== > Basically trying to replicate in ITKv4 the same registration processes of > ITKv3. > > Hans > > > Notice: This UI Health Care e-mail (including attachments) is covered by the > Electronic Communications Privacy Act, 18 U.S.C. 2510-2521, is confidential > and may be legally privileged. If you are not the intended recipient, you > are hereby notified that any retention, dissemination, distribution, or > copying of this communication is strictly prohibited. Please reply to the > sender that you have received the message in error, then delete it. Thank > you. > _______________________________________________ > Powered by www.kitware.com > > Visit other Kitware open-source projects at > http://www.kitware.com/opensource/opensource.html > > Kitware offers ITK Training Courses, for more information visit: > http://kitware.com/products/protraining.php > > Please keep messages on-topic and check the ITK FAQ at: > http://www.itk.org/Wiki/ITK_FAQ > > Follow this link to subscribe/unsubscribe: > http://www.itk.org/mailman/listinfo/insight-developers > _______________________________________________ > Community mailing list > [email protected] > http://public.kitware.com/cgi-bin/mailman/listinfo/community
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