Using Google DNS 8.8.8.8 can cause downloads to become slower

Thunderbolt Download core technicians in the testing process found that if the computer using Google-provided DNS services (8.8.8.8, 8.8.4.4) as the system default DNS server, it will be obvious that the download speed slows down.

Technical personnel analysis found that after the use of Google DNS, the Thunder client to search for multiple resource index, the return is all "unicom" network resources and peer.

If the user is using the Unicom network, will not have any impact.

But when the user is "telecom" network users, it will be due to my characteristics of the "North-South Interconnection problem", resulting in the resources and peer to find the speed is slow or even not, the final download speed has become slow.

The reason for this is probably because the "Unicom node" of the multi resource index is quicker than the "telecom node" to respond to requests from the international network (players who have played international games, should know the network of Unicom, even the delay of the game of international service will be much lower). Therefore, Google DNS will increase the weight of the Unicom node, making the domain name resolution through Google DNS, reunification returned the results of the Unicom node.

As a result, international DNS services, such as open DNS, can also cause the same problem. And the impact is not just download speed, but also the speed of opening the Web page.

Therefore, we suggest that we should use the local DNS bar honestly.

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