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color managing slows gimp down?

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color managing slows gimp down? Casey Connor 03 Mar 04:13
  color managing slows gimp down? Øyvind Kolås 11 Mar 14:38
Casey Connor
2017-03-03 04:13:34 UTC (about 7 years ago)

color managing slows gimp down?

I notice that when I use a color managed display, the zooming in and out of an image is very slow (maybe 500ms per increment). If I disable color management, zooming is instantaneous.

Is this normal/expected?

Gimp 2.9.5, commit 86e101e322, Kubuntu 16.10.

Thanks,

-Casey

Øyvind Kolås
2017-03-11 14:38:29 UTC (about 7 years ago)

color managing slows gimp down?

On Fri, Mar 3, 2017 at 5:13 AM, Casey Connor wrote:

I notice that when I use a color managed display, the zooming in and out of an image is very slow (maybe 500ms per increment). If I disable color management, zooming is instantaneous.

Is this normal/expected?

Gimp 2.9.5, commit 86e101e322, Kubuntu 16.10.

It is normal/known that passing the pixels for display through lcms2 for color management is slower than not doing it. How much slower probably also depend on the type of ICC profile used, if you are using a LUT based profile you could try making a matrix based profile for your display instead. (even if it turns out not to be faster now; it probably will be faster at some point in the future).

/pippin - GEGL lead developer and maintainer - https://patreon.com/pippin