Windows and linux are fairly close to performance parity these days - a few years ago the OpenGL backend was a lot slower than the D3D9 one, so as the linux builds had to use it, they were slow (the CPU side of things has always been neck and neck), but that backend is now the fastest most of the time.
OS: Windows 10 64 bit Professional
CPU: AMD Ryzen 5900X
RAM: 16GB
GPU: Radeon Vega 56
CPU: AMD Ryzen 5900X
RAM: 16GB
GPU: Radeon Vega 56
