https://openwrt.org/toh/hwdata/gl.inet/gl.inet_gl-mt300n_v2

MediaTek MT7628AN 580Mhz single core

with -march=24kc -O2

With 0.0.20180718
receive
[ ID] Interval           Transfer     Bandwidth       Retr
[  4]   0.00-15.00  sec  64.7 MBytes  36.2 Mbits/sec  246             sender
[  4]   0.00-15.00  sec  64.6 MBytes  36.1 Mbits/sec
receiver

send
[ ID] Interval           Transfer     Bandwidth       Retr
[  4]   0.00-15.00  sec   116 MBytes  65.0 Mbits/sec    2             sender
[  4]   0.00-15.00  sec   115 MBytes  64.2 Mbits/sec
receiver