@heckflosse, hi Ingo, I finally got round to building RT to see if a native compile goes faster for my i7 6700K. And it goes much faster! - it seems. Using the same raw and PP3 (with plenty tool usage) under Ubuntu 16.10 I got these results -
1. RT 5.1 via the usual PPA "dhor" - 21 seconds from hitting OK on Save (Jpeg) to RT saying "Ready"
2. RT 5.2 Dev compiled today - 12 seconds.
Does anyone know if any speed-ups have been coded into 5.2 since 5.1 please? If not it seems like a great speed increase.
Here are the 5.2 details in case anything is odd...
Commit date: 2017-07-27
Compiler: cc 6.2.0
Bit depth: 64 bits
Build type: release
Build flags: -std=c++11 -march=native -Werror=unused-label -fopenmp -Werror=unknown-pragmas -Wall -Wno-unused-result -Wno-deprecated-declarations -O3 -DNDEBUG
Link flags: -march=native
OpenMP support: ON
MMAP support: ON
I got some error messages when I did sudo apt update - do these matter? -
W: GPG error: http://download.opensuse.org/repositories/home:/rawtherapee/xUbuntu_16.10 Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY AAC60BAB587A9447
E: The repository 'http://download.opensuse.org/repositories/home:/rawtherapee/xUbuntu_16.10 Release' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
The "Make" took the cpu up to 74 degrees C, I didn't like that! I will limit the no. of cores next time!
Thanks RT people for the continuing work on this great piece of software.