$ git clone --depth=1 https://github.com/cleanbrowsing/dnsperftest/
$ cd dnsperftest
$ ./dnstest.sh
                  test1   test2   test3   test4   test5   test6   test7   test8   test9   test10  Average
10.10.0.2         1 ms    1 ms    1 ms    1 ms    1 ms    1 ms    1 ms    1 ms    1 ms    1 ms      1.00
cloudflare        1 ms    1 ms    1 ms    1 ms    1 ms    1 ms    1 ms    1 ms    1 ms    1 ms      1.00
level3            1 ms    1 ms    1 ms    1 ms    1 ms    1 ms    1 ms    1 ms    1 ms    1 ms      1.00
google            1 ms    1 ms    1 ms    11 ms   17 ms   16 ms   1 ms    10 ms   9 ms    1 ms      6.80
quad9             3 ms    2 ms    1 ms    3 ms    3 ms    3 ms    2 ms    2 ms    2 ms    6 ms      2.70
freenom           7 ms    7 ms    7 ms    7 ms    8 ms    7 ms    7 ms    7 ms    7 ms    7 ms      7.10
opendns           24 ms   1 ms    1 ms    13 ms   1 ms    10 ms   1 ms    12 ms   1 ms    1 ms      6.50
norton            1 ms    1 ms    1 ms    2 ms    1 ms    1 ms    1 ms    1 ms    1 ms    1 ms      1.10
cleanbrowsing     7 ms    20 ms   7 ms    7 ms    7 ms    7 ms    8 ms    7 ms    7 ms    7 ms      8.40
yandex            34 ms   30 ms   29 ms   30 ms   38 ms   33 ms   30 ms   26 ms   33 ms   30 ms     31.30
adguard           7 ms    7 ms    7 ms    7 ms    7 ms    7 ms    7 ms    7 ms    8 ms    7 ms      7.10
neustar           1 ms    1 ms    1 ms    1 ms    1 ms    1 ms    1 ms    1 ms    1 ms    1 ms      1.00
comodo            24 ms   18 ms   16 ms   41 ms   19 ms   16 ms   17 ms   17 ms   20 ms   47 ms     23.50