Getting about ~100Mbps throughput on between two 4011 devices.
Looks like a single CPU core is being used, and the load sits at near 100% on cpu0 when a bandwidth test is run from A to B.
Any plans to support multicore?
See answers here: https://discuss.zerotier.com/t/mikrotik-rb4011-zt-perf-benchmark-maxed-at-100mbits-sec/11610.
I’ve tried asking some related questions in this forum and never got any answer back… Folks at ZT forum are quite nice and understanding 
Agreed, most users on the zt forum are very nice and you can ask anything you want without being called a jerk if you happen to say the wrong thing.
Anyway, another very important factor is AES encryption using hardware offload. Without this, the CPUs will be loaded to 100% due to software encryption regardless of how many cores and threads there are.
I haven’t tested yet if hardware offloading for AES encryption is enabled with the new zt version v10.0.3 that comes with RoS 7.9rc.
The 4011 is a great router, but its performance is disappointing on v7 (CPU pegged on mine just downloading/routing, which never happened for me on v6). That, and it’s a weak ARM chip in the grand scheme of things. The 5009 is a major ARM revision is this regard overall. Without offloading, a cheap Celeron appliance will perform much better and do much more.
https://discuss.zerotier.com/t/mikrotik-ros7-zerotier-low-bandwidth/7626/3
@Larsa, I don’t think it is. I am using ZT in Mikrotik and haven’t noticed a difference in performance, but that might be also the fact that it is single threaded…
@Moba, agreed… It is unfortunate that we cannot squeeze a bit more of performance from RB4011 in this scenario. How I wished there was a version of the RB5009 with WiFi (and proper WiFi Wave2 for both nics).