I have CCR1036. I use VLAN bridging there.
Until now I used VLAN bridging as making VLANs on each port and connect them in the bridge. (vlan100-1 on eth1, vlan100-2 on eth2 and add interfaces vlan100-1 and vlan100-2 to the bridge).

I studied documentation and found that this way is wrong. Correct setting is, not create VLANs on each interface, but set VLAN filtering just on the bridge and add VLANs directly in bridge. This is working, but it looks to me, it has no effect to CPU performance. I supposed, when I change the setting of VLAN bridging, it will have influence to the CPU load, but it looks, the CPU load is the same as it was before.

Am I doing something wrong, or both ways of settings VLAN bridge has the same stress to CPU?

There will be no change in performance on a CCR1036 as it does not have a hardware switch chip.