git clone --depth=1 https://github.com/cleanbrowsing/dnsperftest/
 $ cd dnsperftest
 $ bash ./dnstest.sh 

or manually create the following file, make it executable and run it:

dnstest.sh

#!/usr/bin/env bash
 
command -v bc > /dev/null || { echo "bc was not found. Please install bc."; exit 1; }
{ command -v drill > /dev/null && dig=drill; } || { command -v dig > /dev/null && dig=dig; } || { echo "dig was not found. Please install dnsutils."; exit 1; }
 
 
 
NAMESERVERS=`cat /etc/resolv.conf | grep ^nameserver | cut -d " " -f 2 | sed 's/\(.*\)/&#&/'`
 
PROVIDERS="
1.1.1.1#cloudflare 
4.2.2.1#level3 
8.8.8.8#google 
9.9.9.9#quad9 
80.80.80.80#freenom 
208.67.222.123#opendns 
199.85.126.20#norton 
185.228.168.168#cleanbrowsing 
77.88.8.7#yandex 
176.103.130.132#adguard 
156.154.70.3#neustar 
8.26.56.26#comodo
"
 
# Domains to test. Duplicated domains are ok
DOMAINS2TEST="www.google.com amazon.com facebook.com www.youtube.com www.reddit.com  wikipedia.org twitter.com gmail.com www.google.com whatsapp.com"
 
 
totaldomains=0
printf "%-18s" ""
for d in $DOMAINS2TEST; do
    totaldomains=$((totaldomains + 1))
    printf "%-8s" "test$totaldomains"
done
printf "%-8s" "Average"
echo ""
 
 
for p in $NAMESERVERS $PROVIDERS; do
    pip=${p%%#*}
    pname=${p##*#}
    ftime=0
 
    printf "%-18s" "$pname"
    for d in $DOMAINS2TEST; do
        ttime=`$dig +tries=1 +time=2 +stats @$pip $d |grep "Query time:" | cut -d : -f 2- | cut -d " " -f 2`
        if [ -z "$ttime" ]; then
	        #let's have time out be 1s = 1000ms
	        ttime=1000
        elif [ "x$ttime" = "x0" ]; then
	        ttime=1
	    fi
 
        printf "%-8s" "$ttime ms"
        ftime=$((ftime + ttime))
    done
    avg=`bc -lq <<< "scale=2; $ftime/$totaldomains"`
 
    echo "  $avg"
done
 
 
exit 0;

Dockerfile contains the following:

Dockerfile

FROM alpine:latest
RUN apk --no-cache add bash bc drill \
    && mkdir /app \
    && wget https://raw.githubusercontent.com/cleanbrowsing/dnsperftest/master/dnstest.sh -O /app/dnstest.sh \
    && chmod +x /app/dnstest.sh
 
ENTRYPOINT ["/app/dnstest.sh"]

docker build --tag dnstest .

returns:

Sending build context to Docker daemon  83.46kB
Step 1/3 : FROM alpine:latest
latest: Pulling from library/alpine
aad63a933944: Pull complete 
Digest: sha256:b276d875eeed9c7d3f1cfa7edb06b22ed22b14219a7d67c52c56612330348239
Status: Downloaded newer image for alpine:latest
 ---> a187dde48cd2
Step 2/3 : RUN apk --no-cache add bash bc drill     && mkdir /app     && wget https://raw.githubusercontent.com/cleanbrowsing/dnsperftest/master/dnstest.sh -O /app/dnstest.sh     && chmod +x /app/dnstest.sh
 ---> Running in a8c11400d24c
fetch http://dl-cdn.alpinelinux.org/alpine/v3.11/main/x86_64/APKINDEX.tar.gz
fetch http://dl-cdn.alpinelinux.org/alpine/v3.11/community/x86_64/APKINDEX.tar.gz
(1/7) Installing ncurses-terminfo-base (6.1_p20200118-r3)
(2/7) Installing ncurses-libs (6.1_p20200118-r3)
(3/7) Installing readline (8.0.1-r0)
(4/7) Installing bash (5.0.11-r1)
Executing bash-5.0.11-r1.post-install
(5/7) Installing bc (1.07.1-r1)
(6/7) Installing ldns (1.7.1-r1)
(7/7) Installing drill (1.7.1-r1)
Executing busybox-1.31.1-r9.trigger
OK: 8 MiB in 21 packages
Connecting to raw.githubusercontent.com (151.101.64.133:443)
saving to '/app/dnstest.sh'
dnstest.sh           100% |********************************|  1582  0:00:00 ETA
'/app/dnstest.sh' saved
Removing intermediate container a8c11400d24c
 ---> f04a1f625386
Step 3/3 : ENTRYPOINT ["/app/dnstest.sh"]
 ---> Running in f23f9090e44f
Removing intermediate container f23f9090e44f
 ---> 2d50dc06d819
Successfully built 2d50dc06d819
Successfully tagged dnstest:latest

docker run dnstest

https://github.com/cleanbrowsing/dnsperftest