Hi, I also tested with the build of an 'open' project (the crypto example was part of a work-related project). The results below are for the compilation of OpenCV (latest git from https://github.com/itseez/opencv), again with VS2012 Win64, Release only and no tweaking of the CMake settings.
3.1.0: 10m50s 2.8.12: 4m02s 3.1.0 (/MP): 6m29s 2.8.12 (/MP): 3m48s This does not look entirely the same as for the Crypto example, but the performance decrease is at least very much visible. Best regards, Yves On Fri, Jan 16, 2015 at 5:24 PM, Yves Frederix <[email protected]> wrote: > Hi, > >>> 3.1.0: >>> ALL Crypto Crypto_s Crypto_test >>> real 0m38.211s 0m14.023s 0m7.003s 0m14.691s >>> >>> 2.8.12: >>> ALL Crypto Crypto_s Crypto_test >>> real 0m27.230s 0m17.110s 0m10.231s 0m18.618s >> >> Interesting, thanks for the timings. >> >>> This made me wonder if it maybe had to do with default settings for >>> parallelization in the builds. So I tried, and if I explicitly "set >>> CL=/MP" for the 3.1.0 build, build time reduces from 38 seconds to 24 >>> seconds which is what I would expect. Could this be the cause and was >>> there a change in default settings? >> >> I don't think such a change was made intentionally. To help narrow >> it down, could you please do the timings for CMake 3.0.2 as well? > > The behavior seems to be the same for 3.0.2: > > 3.0.2: > ALL Crypto Crypto_s Crypto_test > real 0m38.756s 0m14.113s 0m7.150s 0m15.106s > > > Regards, > Yves -- Powered by www.kitware.com Please keep messages on-topic and check the CMake FAQ at: http://www.cmake.org/Wiki/CMake_FAQ Kitware offers various services to support the CMake community. For more information on each offering, please visit: CMake Support: http://cmake.org/cmake/help/support.html CMake Consulting: http://cmake.org/cmake/help/consulting.html CMake Training Courses: http://cmake.org/cmake/help/training.html Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Follow this link to subscribe/unsubscribe: http://public.kitware.com/mailman/listinfo/cmake
