I have local files on a Mac running latest OS. My libreelec (asus chromebox) connects to my Mac via zeroconfig (NFS). I have gigabit ethernet. How can I test actual connection speed??

I probably should have posted in general support. But iperf3 is the solution. A lot of trial and error my part to get it up and running. My gigabit ethernet seems to be working fine but i'm still trying to figure out why I'm suddenly having caching issues. I've used openelec>libreelec for 3 or 4 years now and never had an issue.