I was able to get quite similar numbers on RH w/ gcc 4.4.7 in standard release mode:
Array size = 100, repetitions = 20000000 The elapsed time for a C++ fill_n 690000 ms. The elapsed time for a itk.Fill 1910000 ms. The elapsed time for a C fill 2620000 ms. Array size = 1000, repetitions = 2000000 The elapsed time for a C++ fill_n 460000 ms. The elapsed time for a itk.Fill 1700000 ms. The elapsed time for a C fill 2520000 ms. Array size = 10000, repetitions = 200000 The elapsed time for a C++ fill_n 420000 ms. The elapsed time for a itk.Fill 1680000 ms. The elapsed time for a C fill 2510000 ms. Array size = 100000, repetitions = 20000 The elapsed time for a C++ fill_n 570000 ms. The elapsed time for a itk.Fill 1670000 ms. The elapsed time for a C fill 2510000 ms. Array size = 1000000, repetitions = 2000 The elapsed time for a C++ fill_n 600000 ms. The elapsed time for a itk.Fill 1680000 ms. The elapsed time for a C fill 2510000 ms. Array size = 10000000, repetitions = 200 The elapsed time for a C++ fill_n 1510000 ms. The elapsed time for a itk.Fill 1820000 ms. The elapsed time for a C fill 2540000 ms. I did modify the test to set the value to 3.14, instead of 0, because other optimization may happen with a zero value... Brad On Apr 10, 2013, at 11:33 AM, Bill Lorensen <[email protected]> wrote: > Or maybe Ubuntu is milliseconds and windows is seconds? > > > > On Wed, Apr 10, 2013 at 11:28 AM, Bill Lorensen <[email protected]> > wrote: > The Ubuntu timings are much longer than windows. Was that expected? > > > > On Wed, Apr 10, 2013 at 10:42 AM, <[email protected]> wrote: > > > -----Original Message----- > From: Staring, M. (LKEB) > Sent: woensdag 10 april 2013 16:28 > To: Insight Developers ([email protected]) > Subject: FW: fill > > Forgot to include the maliing list > > -----Original Message----- > From: Staring, M. (LKEB) > Sent: woensdag 10 april 2013 16:24 > To: 'Williams, Norman K'; [email protected] > Cc: [email protected] > Subject: RE: fill > > Hi, > > Attached you can find some timings for different POD types, I tested for > short, int, float and double. std::fill_n is always faster, but less so for > longer types. > > I simply modified itk::Array::Fill to use std::fill_n instead of referring to > the vnl_vector::fill which uses a simple loop over the data. Not sure if this > is the way to go, but my experimental looks green: > > http://open.cdash.org/buildSummary.php?buildid=2871413 > > The patch I just submitted to gerrit: > > http://review.source.kitware.com/#/c/10801/ > > Curious to your comments, > > Regards, Marius > > -----Original Message----- > > > _______________________________________________ > 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 > > > > > -- > Unpaid intern in BillsBasement at noware dot com > > > > -- > Unpaid intern in BillsBasement at noware dot com > _______________________________________________ > 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
_______________________________________________ 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
