After some tweaking...

As per my last post where I was trying to optimize my kernel for Linux. I tried and have Cadence working on FreeBSD with linux binary compatibility. Also, the times from my arbitrary program to compare speed showed:

native, 15.2.0 Darwin: 643 seconds
emulated 1CPU, linux-3.2.0: 1112 seconds 
emulated 1CPU, FreeBSD 11: 669 seconds

I made some tweaks to MacOS as well, so my arbitrary result is that FreeBSD is much faster than Linux under emulation.