Am 05.03.2017 um 18:41 schrieb David Bremner: > I'm not able to reproduce the large difference between the debian > package and compiling with > > ./build.sh --disable-gnome-keyring --build-type Release > > On my machine (an older i7), I get an average of 40s to export with > 2.2.3-2 (compiled with -O3, just uploaded) and an average of 39s with > the build.sh produced binary. In both cases the time is dominated by > the non-local means noise reduction (about 24s). > > Looking only at the time in the equalizer module, the improvement is a > slightly larger (as a percentage) 7.9 seconds for build.sh versions 8.5 > seconds for the debian package. Given we can't use -march=native or > -mtune=native, that's probably an acceptable slowdown.
This is really interesting. And puzzling. I am wondering if it has to do with the fact that I am using the latest Kaby Lake CPU i7-7700k? The Equalizer module in my case improves from 6,9 s to 3,0 s and non-local means noise reduction improves from 10,3 s to 8,7 s. They both sum up to 17,2 s with the debian testing binary and 11,7 s with my self-compiled binary. This is a 32% difference. What else can I do to help debugging? Matthias
