after r52555 I had a slowdown in cycles rendering of about 15 % in all scenes, no matter what distribution I use, from builderblender or graphicall and no matter if it’s win64 or MinGW.
Everytime I use the several unchanged testfiles. (Don’t ask for this file, they are really heavy)
The question is if there is anybody else who noticed this slowdown.
Oh, and in the latest Win64 build there is a massive increase of fireflies in one of this scenes (8 glasses, one after another).
Again, this is a question if I’m alone with this mutation, or if I should make a bugreport.
As for the slowdown, that might be due to some rather substantial changes to the sample weighting that began with a couple of large bugfixes for materials with large numbers of shader nodes and materials using a combination of mix and add shader nodes. This culminated with another set of tweaks to fix some artifact issues with tiled rendering.
I recommend you get a new build after the mentioned revision and see if you get better results, otherwise it might be enough of a concern to file a bug report.
Check your render tiles. Recently tile size was changes from “number of x and y tiles” to “size of tiles in pixels”. They are more than likely not set to the ideal settings for your scene, and in certain situations setting the correct tile size can cut render times almost in half.
Yes, I know, but the increase of rendertime happens during the newer builds >52555, after my settings are already adjusted to 512x512 in the scene above.
