Dns Benchmark Script

dnsbenchmark.sh

#! /bin/bash

dnsServers=(
"Google|8.8.8.8|8.8.4.4"
"ControlD|76.76.2.0|76.76.10.0"
"Quad9|9.9.9.9|149.112.112.112"
"Cloudflare|1.1.1.1|1.0.0.1"
)

domains=(
"google.com"
"discord.com"
"microsoft.com"
"yandex.ru"
"x.com"
"gentoo.org"
"github.com"
"stackoverflow.com"
"wpengine.com"
"opensource.com"
)

paramNumIters="${1:-10}"

echo "
--- Simple DNS Benchmark by CanadianBacon ---
# Iterations: $paramNumIters
# DNS Providers: ${#dnsServers[@]}
# Domains: ${#domains[@]}

# Time per DNS provider: ~$(($paramNumIters*${#domains[@]}/10*2)) seconds

First passed parameter is number of iterations.
A higher number will provide more accurate results at the expense of runtime.
    e.g. \`${0:-./dnsbenchmark.sh} 100\` will run 100 iterations per dns server \(200 per config entry due to alternate DNS\)

The DNS servers and domains are configurable in the script.
---------------------------------------------
"




for server in ${dnsServers[@]};
do
  server=(${server//|/ })

  latency=0
  iters=0

  for domain in ${domains[@]};
  do
    for i in $(eval echo "{1..${paramNumIters}}");
    do
      result=$(dig @${server[1]} ${domain} +noall +stats | head -n1 | grep -Po '[0-9]+')
      latency=$((latency + result))
      iters=$((iters + 1))
      sleep 0.1
    done
  done

  latency=$((latency / iters))
  secondaryLatency=0
  iters=0

  for domain in ${domains[@]};
  do
    for i in $(eval echo "{1..${paramNumIters}}");
    do
      result=$(dig @${server[2]} ${domain} +noall +stats | head -n1 | grep -Po '[0-9]+')
      secondaryLatency=$((secondaryLatency + result))
      iters=$((iters + 1))
      sleep 0.1
    done
  done

  secondaryLatency=$((secondaryLatency / iters))

  echo "${server[0]} [${server[1]} / ${server[2]}] : ${latency} ms / ${secondaryLatency} ms"
done

Removed OpenDNSHome as there seems to be some censorship