Denoiser needs a long time some times

[Micha]

Hi,

some times the denoiser needs a quite long time, several times the same entry is shown at the progress window. I did a test, set the noise level to 1 (GPU+CPU mode). First the LC pass is started, than a first progressive run. Since the noise threshold is at 1 only, the rendering is stopped fast. If I set no time limit, than denoising needs a long time (30 stripes are calculated, see screenshot), if the time limit is set to 1min, than the denoising is quick done, only one entry is shown at the progress window. Should the denoising time not be the same?

Last test - noise 1 and time 10 min. The denoiser is slow again. Is the time limit not for stopping the sampling only? Doe's it control the denoiser too?

(Later I tested the GPU only mode and it was the same, so it's not a question of the hyprid mode)

[Micha]

And an other question - saving only the effect result channel at 3200x1800 needs approx. 20s. This is quite long, could it be optimized? Maybe the png compression level is to high.

[Micha]

Denoiser problem solved at VfR next.