Your DNS resolver has nothing to do with your download speed.
English
-
Changing your DNS to a public DNS like Google's most certainly can speed up downloads depending on where you are.
-
Would you mind explaining how? Since DNS's only function is to convert names (i.e. bungie.net) to IP addresses (i.e. 12.34.56.78) I'm curious how that could be the case, regardless of geographic location.
-
It chooses from a server closest to you based on the DNS. The 8.8.8.8 is Google's, which has more public servers that are controlled by companies that specialize in it rather than your ISP's servers, which may be getting bogged down and not maintained as well.
-
You're talking about speed to resolve the name query? Yes, Google's servers are very robust and can resolve the query very quickly. This makes it appear as if your internet is "snappier" and more performant. However - it won't increase your throughput from the server when downloading a 17GB file. If instead, you're saying that Google's DNS would resolve "download.bungie.net" to a different server than your ISP's DNS, I believe that's incorrect. Yes, you can have multiple IP records attached to the DNS name, but those are controlled centrally by the person who administers the domain, and therefore all DNS servers should have the same list.
-
I'm no expert at this stuff, but I can tell you from past and current experiences that it definitely speeds it up based on where I am. The explanation I received was the one I gave you. My download speed on my ISP's DNS is 23.7 Mb/s, but when I switched to Google's, it jumped up to 31.3 Mb/s.