[Pkg-phototools-devel] Bug#855359: Bug#855359: darktable: 2.2.1 binary very slow compared to self-compiled

[David Bremner]

Matthias Bodenbinder <matthias at bodenbinder.de> writes:

> Am 06.03.2017 um 20:45 schrieb David Bremner:

> Now I got your point. I downloaded 2.2.3-2 and tested it. The speed
> improvement is minimal: 19,6 s for the whole pixel pipeline vs. 21,9 s
> for version 2.2.3-1 and compared to 14 s for self-compiled.

I managed to roughly duplicate this behaviour on my laptop which is an
i7-6600U. In fact the speed difference is more dramatic, 51s for the
binary package and about 30s for the "self compiled" version (with
-march=native).

There is a small improvement (from 59s to 51s on my laptop) in -4 due to
using CMAKE_BUILD_TYPE=Release. I'm not sure if further improvements are
possible by tweaking buildflags, that will require some more test builds.