Compare some DNS response times

dns-bench.sh

#!/bin/bash
DOM=scalzi.com
if [[ -n "$1" ]]; then
  DOM="$1"
fi
echo $DOM
# parallel -j 10 -N 2 --tagstring '{2} ({1})' "dig @{1} a "${DOM}" | egrep time" \
parallel -j 10 -N 2 --tagstring '{2} ({1})' "dig @{1} a "${DOM}" +noauthority +noadditional |  grep -Po 'A.*(\.[^.]+){3}|(?:time: )(.*)' | tac | paste -sd '\t'" \
  ::: \
  9.9.9.9 quad9 \
  149.112.112.112 quad9_secondary \
  9.9.9.11 quad9_ecs \
  9.9.9.10 quad9_unfiltered \
  2620:fe::fe quad9_IPv6 \
  8.8.8.8 google \
  1.1.1.1 cloudflare \
  2606:4700:4700::64 cloudflare_IPv6 \
  84.200.69.80 dns.watch \
  82.145.9.8 1und1 \
  | column -t \
  | sort -h

dns-bench github.com
github.com
cloudflare        (1.1.1.1)             time:  16  msec  A  140.82.121.4
cloudflare_IPv6   (2606:4700:4700::64)  time:  16  msec  A  140.82.121.4
dns.watch         (84.200.69.80)        time:  12  msec  A  140.82.121.4
google            (8.8.8.8)             time:  28  msec  A  140.82.121.4
quad9             (9.9.9.9)             time:  28  msec  A  140.82.121.4
quad9_ecs         (9.9.9.11)            time:  20  msec  A  140.82.121.3
quad9_IPv6        (2620:fe::fe)         time:  24  msec  A  140.82.121.4
quad9_secondary   (149.112.112.112)     time:  24  msec  A  140.82.121.4
quad9_unfiltered  (9.9.9.10)            time:  24  msec  A  140.82.121.3
1und1             (82.145.9.8)          time:  12  msec  A  140.82.121.4