* nanoq <na...@online.de> [12-25-20 09:32]:
> Dear all,
> First things first:
> Fedora 32, Intel I5, 32GB RAM, Nvidia GeForce GTX 970.
> Currently DT 3.4., but same problem occurred under 3.2.1 as well.
> I searched this list to find a thread where a similar problem was found
> under Win10, without a real solution. Besides I doubt that Win10 and Linux
> are comparable in this (and other) respect.
> 
> When trying to re-edit a previously edited photo DT almost stalls. No matter
> what I do, zoom in or out, retouch, move sliders it almost stalls.
> Retouching a single spot using the healing tool takes about 2-5 minutes,
> while one of the CPU-kernels is at 100% load, the other CPU-kernels are not
> equally stressed. Yes I have CL enabled and running.
> Meanwhile I can run any other apps without any noticeable slowdown.
> 
> I found out that compressing the history stack "improves" things to like
> 3-5seconds for retouching a single spot.
> Editing new, that is photos that have not been previously edited, runs
> smoothly.
> 
> Any ideas?

possibly config differences.  I am on openSUSE Tumbleweed, compiling
master, Nv GF GTX 450 36GB RAM and do not see that.

try:  mv ~/.config/darktable ~/.config/XXdarktable

this will give you a clean config


> And above all: Merry Christmas and stay healthy!!!!

and to you and yours
-- 
(paka)Patrick Shanahan       Plainfield, Indiana, USA          @ptilopteri
http://en.opensuse.org    openSUSE Community Member    facebook/ptilopteri
Photos: http://wahoo.no-ip.org/piwigo               paka @ IRCnet freenode
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