For those of us who have multicore/processor systems, this definitely pertains to you. I’ve experienced renders where all the cores in my system will render an image, but one of the cores will get “stuck” on a hard part of the image while all the other cores idle. This isn’t a bug in the system/blender, but just rather, the unlucky core got the part of the image that is the most complicated compared to other parts of the image that aren’t so complicated.
Is there a way to have the other cores see that there is only one “part” of the image left and all contribute to getting it rendered even faster (like the thread title says “sub parts”). With the Suzanne Render Benchmark I’d rather not bump up the number of parts (because it can add seconds (or more, I haven’t tested) to the rendering time of an image). If it doesn’t exist currently, what are your thoughts about it and could it even be implemented?