RB450G bridging speed varies on ROS versions

Hardware MikroTik hardware general
1

Hello,
I’ve just measured if 450G can do a 100mbps routing (if no other functions needed) as a temporary device.
The test started with bridging two ports (not using switch chip), and measured the thruput with iperf.

What is strange:
i could do 600mbps halfduplex traffic from pc 2 pc (1.2gbps aggregated) with 4.17
but on 5.2, i could do only ~400-450mbps.
no other things changed - only upgrade.
who has an idea? :wink:

2

These OS are very different, even only kernel change could explain it (different drivers).
I would not enter the debate about v5 being stable or not, but it “may” not be fully mature yet by opposite to v4.17. I honnestly don’t know, but I saw myself a small drop in routing perf between 2 hosts with 1Gb FD links when I tested a previous v5RC.