I was checking for tools to benchmark the performance of DNS servers in my network. The reason behind this performance test was to identify the root cause of the internet slowness within my network. One of the good free tool that I found online is DNS Benchmark Tool.
This is a very light weight and portable tool. This is just 180KB and helps us to perform the DNS speeed test. With this tool I figured out one anonymous DNS server running in an individuals laptop also.
I found this tool as a useful utility.