Windows 10 vs. Ubuntu 18.04 LTS Performance On AMD Ryzen 9 3900X
V-RAY CPU-based rendering was 6% faster on Ubuntu.
IndigoBench on the Ryzen 9 3900X was also much faster on Linux.
While the Ryzen 9 3900X is performing better on Windows 10 than we've seen in past AMD Windows vs. Linux comparisons, the CPU-based rendering performance continues being much faster on Linux. With the Blender modeling software, Ubuntu 18.04.2 LTS won across the board of all the different scenes benchmarked.
Appleseed is another renderer that was recently added to the Phoronix Test Suite / OpenBenchmarking.org. With the exception of one of the three scenes, Ubuntu 18.04 LTS continued offering lower rendering times.