Hi,
on my Ubuntu system it seems to be both. It's less slow when using the button but still slow with denoiseprofile.
darktable -d opencl says:

369,710244 [opencl_denoiseprofile] couldn't enqueue kernel! -52, devid 0
369,710270 [opencl_pixelpipe] could not run module 'denoiseprofile' on gpu. falling back to cpu path

(once when using the button, twice with mouse-wheel)

Am 27.09.19 um 08:34 schrieb rawfiner:
If it is only zooming, I guess this may be relared to the problem that computations are triggered twice when zooming with the mouse wheel, which doubles the processing time. If you zoom with the button on the up-left part of the darkroom, do you experience the same issues?

rawfiner


Le ven. 27 sept. 2019 à 08:17, Terry Duell <tdu...@iinet.net.au <mailto:tdu...@iinet.net.au>> a écrit :

    Hello Andreas,

    On Fri, 27 Sep 2019 16:03:54 +1000, Andreas Schneider
    <a...@cryptomilk.org <mailto:a...@cryptomilk.org>>
    wrote:

    > On Friday, 27 September 2019 01:42:54 CEST Terry Duell wrote:
    >> Hello,
    >
    > Hi,
    >
    >> I've just built the current master (1886-ga2f84373b) on Fedora
    30, using
    >> my usual rpmbuild spec file, and find that it is very slow,
    particularly
    >> noticeable when zooming the image or applying noise reduction,
    it takes
    >> much longer than previous builds to finish 'working'.
    >> It's possible I have a local issue, but not seen anything
    obvious thus
    >> far.
    >
    > OpenMP is turned off in the Fedora spec file.

    I agree that would be the first best guess, but OpenMP is turned
    on in my
    spec file.
    I searched the rpmbuild output and OpenMP is found.

    Cheers,
-- Regards,
    Terry Duell
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