RT-AC68U CPU load vs transfer speed

[drabisan]

That's the load of the CPU while I was transferring a large file from wireless to a wired connection.
Speed of the transfer was 250mbps.
AC connection, wlan interface speed 867mbps, no interference on 5GHz, ~40db signal, good cat6 cable between router and storage.

I'm not concerned but I wasn't expecting 60-70% CPU load for such a simple task.

If somebody can test and share the results. Any thoughts?

I'm posting here instead of opening a ticket to Asus...their web form is painfully show...

 

[drabisan]

For what it matters: disabling QoS puts the CPU load to 15-20% for the same 200-250mbps wireless to wired.