cat >> dnsperf.txt
login.live.com. A
^d

dnsperf -d ./dnsperf.txt -n 5000 -s <serverip> -v



e.g.:

09:55 dayid@maleah:/tmp$ dnsperf -d ./dnsperf.txt -n 5000
DNS Performance Testing Tool
Version 2.4.2

[Status] Command line: dnsperf -d ./dnsperf.txt -n 5000
[Status] Sending queries (to 127.0.0.1)
[Status] Started at: Fri Jan 21 09:55:53 2022
[Status] Stopping after 5000 runs through file
[Status] Testing complete (end of file)

Statistics:

  Queries sent:         5000
  Queries completed:    5000 (100.00%)
  Queries lost:         0 (0.00%)

  Response codes:       NOERROR 5000 (100.00%)
  Average packet size:  request 32, response 312
  Run time (s):         1.320258
  Queries per second:   3787.138574

  Average Latency (s):  0.014519 (min 0.000233, max 0.197709)
  Latency StdDev (s):   0.006970

09:55 dayid@maleah:/tmp$ cat dnsperf.txt 
login.live.com. A