Sorry for editing the post so often but I had to correct a lot of stuff after double checking.
download https://download.blender.org/demo/test/benchmark.zip , unzip and run blender -b benchmark.blend -o //render -f 2467 from the directory with the benchmark.blend file. Check the render output in the directory just in case something wonky goes on. (That is only one frame of the full benchmark *) The full, unchanged benchmark should work with time blender -b benchmark.blend -o //render -a
*Edit: hmmm … mabe the classroom scene would be better for more available comparison data but the “Production Benchmark” is a lot more realistic as a real world Film - Blender Scene. I let the benchmark run on my R5 1600 and I got a run time of 1h 7m 39s for that one frame.
Some time in the future I may pack a few astrophysics simulations into a self contained benchmark. I would be really interested in the results but I am not sure when I will get around to doing that.
Edit: In case I ever get around to it, what would be a good completion time to aim for (on what system) for a good benchmark?