Re: [Gimp-user] color managing slows gimp down?

[Øyvind Kolås <pippin gimp org>]

On Fri, Mar 3, 2017 at 5:13 AM, Casey Connor
<gimp-user-list caseyconnor org> 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