TL;DR. Apart from a slight worsening in legacy 2.4 GHz @ 20 MHz wireless stability, I believe Mikrotik have largely solved the worst of the hAP ac2 wireless issues.
Using the same exact process and equipment as my Release Candidate 6.43rc5 testing (principally a RTL8814AU WiFi chip USB 3.0 adapter connected to client PC via USB 3.0 ports), here are the peak throughput results for Release 6.42.3:
- 2.4 GHz peak download throughput: 161 Mbit/s from 135 Mbit/s = +19% improvement
- 2.4 GHz peak upload throughput: 117 Mbit/s from 86 Mbit/s = +36% improvement (*)
- 5.0 GHz peak download throughput: 399 Mbit/s from 396 Mbit/s = no change
- 5.0 GHz peak upload throughput: 417 Mbit/s from 347 Mbit/s = +20% improvement
All results confirmed with three 60 second runs. Peak throughput commands used: iperf3 -N -P10 -t 60 -R (download) and iperf3 -N -P10 -t 60 (upload).
Here is a summary of the results from the stability tests for 6.42rc3:
The stability test results are shown next visually in Box-and-Whisker plots of 56-byte data, 10 ms interval, 60k count ICMP pings for 6.43rc5 compared to 6.42.3. Again, I have included tests of an old Asus RT-N56U for comparison.
Lower is better:
(*) Changing router orientation from horizontal to vertical caused a leap from what appeared to be a decline to 69 Mbit/s, instead to an improvement of 117 Mbit/s in 2.4 GHz upload! Changing orientation for other peak throughput tests did not significantly impact performance.