What is the fastest DNS for your internet connection? the result may vary from diffrent user, why dont you find out by yourself by benchmark it, i found some good tools for benchmarking DNS, to show which is the fast DNS that suitable for my internet connection, and there are many result for it. Steve Gibson the creator build some cool utilities for it, you can check it by yourself in https://www.grc.com/dns/benchmark.htm, or you can download the link below.
Here is some screenshot from GRC site
Download Link : Download DNS Benchmark 2017
This is simple tools for find suitable DNS for you, just click on Nameservers tab, and click Run Benchmark, just sit and relax for a while, the apps will show you the result of fastest DNS for your internet connection.
This DNS application has large of database for list DNS that available, and many of them are from famous provider in the world and free to use, just right click on the DNS IP which is the fastest from the list, and select Copy Nameserver's IP.
Open your Network Connection (in windows) and right click on your ethernet or wireless adapter, and click Properties, it will show like this (see below)
Click on Internet Protocol Version 4 (TCP/IPv4), then click on Properties Button
Select "Use the following DNS Server Address"
Put IP from DNS Benchmark application
and Click OK, and OK again.
Feel the diffrent, your internet will go faster than before.