as the wifi interface is NOT on the same switch-chip as the eth ports, wifi will never have hardware-accelleration.
wifi will allways pass thru the cpu and is limited by the cpu performance
Running 6.44 (stable) on :
CCR1009-8G-1S (2x ipsec/l2tp site-to-site, dhcpd), CRS125-24G-1S, RB1100, RB962UiGS-5HacT2HnT (10pc),
RB951, RB750GL ,RB2011UAS-RM, CHR running dude (CHR running in VirtualBox on OSX)