HAP AC very high load on CPU

Hi all! I have the following problem when I try to make a measurement of speed speedtest.net via Wi-Fi 5ghz, at a speed of 100 megabits provider with fasttrack enabled I get a CPU load of about 70%.
I think it’s a lot.
On the Internet I found an article reviewing the AC and HAP tests, including tests WIFI via speedtest here it is (https://14bytes.ru/obzor-i-testirovanie-proizvoditelnosti-mikrotik-hap-ac/#i-7)
In that article, the author articulated figures in the following tests using speedtest. The speed from the ISP 200 megabits and maximum load was 50%

What information configuration I have to do?