> I feel the same since the update, but I could't be sure so I thought it
> might just be my imagination.
>
> Hardware:
> AMD FX-8320 Eight-Core Processor 3,5 Ghz
> Radeon HD 7970 Ghz Edition
> 16 GB Ram
> File, cache etc. on SSD
>
> I'm also using Arch. Until the release the aur git version, then the
> precompiled package.
One thing that abruptly strikes me is the choice of compiler used to
build DT. Assuming that appropriate libraries are available, a DT built
with gcc will use OpenCL but I believe that a DT built with clang will
not. OpenCL is used by DT for some on-CPU computations, with a fallback
to slower code if OpenCL is not available. In my own tests on Fedora 23,
this caused a clearly visible slowdown in a clang-compiled DT than on a
gcc-compiled one.
This may be irrelevant if DT is using your GPU for computations. I
don't have a suitable GPU (or a suitable driver for it), so my DT is
all on-CPU.
It's possible that Arch has switched their default compilers from
gcc to clang and so DT was (re)built with clang in this release.
Obvious disclaimer: I may be totally off track here.
- cks
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