Am 15.09.18 um 09:40 schrieb Matthias Bodenbinder: > Am 13.09.18 um 07:38 schrieb Matthias Bodenbinder: >> export CC=/usr/bin/clang >> export CXX=/usr/bin/clang++ >> INSTALL_PREFIX_DEFAULT="/opt/darktable-clang" >> > This is working now. I had to remove the build directory after editing > build.sh > > I have the following packages installed on Manjaro: > > clang 6.0.1-2 > lib32-llvm-libs 6.0.1-1 > llvm 6.0.1-4 > llvm-libs 6.0.1-4 > openmp 6.0.1-1 > > And the result is: The DT performance is the same! pixelpipe time differences > are less than 3 %. > > 22# ./bench-script-clang-vs-gcc.sh > 3 runs no opencl > run clang 1: 16,704839 [dev_process_export] pixel pipeline processing took > 16,401 secs (128,498 CPU) > run gcc 1: 16,537099 [dev_process_export] pixel pipeline processing took > 16,205 secs (124,564 CPU) > run clang 2: 17,087163 [dev_process_export] pixel pipeline processing took > 16,798 secs (130,706 CPU) > run gcc 2: 16,566993 [dev_process_export] pixel pipeline processing took > 16,240 secs (124,351 CPU) > run clang 3: 16,728366 [dev_process_export] pixel pipeline processing took > 16,440 secs (128,643 CPU) > run gcc 3: 16,588298 [dev_process_export] pixel pipeline processing took > 16,260 secs (124,372 CPU) > #### > 3 runs with opencl > run clang 1: 7,668977 [dev_process_export] pixel pipeline processing took > 7,298 secs (20,387 CPU) > run gcc 1: 7,533379 [dev_process_export] pixel pipeline processing took > 7,129 secs (17,671 CPU) > run clang 2: 7,599311 [dev_process_export] pixel pipeline processing took > 7,235 secs (20,150 CPU) > run gcc 2: 7,516472 [dev_process_export] pixel pipeline processing took > 7,115 secs (17,731 CPU) > run clang 3: 7,639706 [dev_process_export] pixel pipeline processing took > 7,275 secs (20,923 CPU) > run gcc 3: 7,662320 [dev_process_export] pixel pipeline processing took > 7,257 secs (17,884 CPU) > > But the binaries are a lot smaller: > Are you looking at stripped files, or what does "size" print? Are optimization options similar?
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