对比公共DNS服务的性能

Google 的 8.8.8.8，CloudFlare 的 1.1.1.1，Quad9 的 9.9.9.9，OpenDNS 的 208.67.222.222…越来越多的企业和机构提供了免费的公共 DNS 解析服务，但它们的性能究竟谁更胜一筹，解析速度究竟有多快？

有研究者利用了全球 18 个位置（不包括中国）测试了这些 DNS 服务的性能。除了 Yandex 的 77.88.8.7，所有 DNS 服务在北美和欧洲的响应速度都在 15ms 以内，也就是说如果你生活在这些地区，你可以选择任意的公共 DNS 服务。

CloudFlare 的服务平均速度最快，全球平均响应速度仅仅为 4.98 ms，Google 和 Quad9 位居第二和第三，Quad9 在北美和欧洲比 Google 快，但在亚洲和南美比较慢；Yandex 只在俄罗斯比较快，其它地方都很慢。

Global Average

#1 CloudFlare: 4.98 ms#2 Google: 16.44 ms

#3 Quad9: 18.25 ms

#4 CleanBrowsing: 19.14 ms

#5 Norton: 34.75 ms

#6 OpenDNS: 46.51 ms

#7 Comodo: 71.90

#8 Yandex: 169.91

North America Average

#1 CloudFlare: 3.93 ms#2 Quad9: 7.21 ms

#3 Norton: 8.32 ms

#4 Google: 8.53 ms

#5 CleanBrowsing: 11.83 ms

#6 OpenDNS: 14.66 ms

#7 Comodo: 25.91 ms

#8 Yandex: 119.09 ms

Europe Average

#1 CloudFlare: 2.96#2 Quad9: 4.35

#3 CleanBrowsing: 5.74

#4 Google: 7.17

#5 OpenDNS: 8.99

#6 Norton: 10.35

#7 Comodo: 13.06

#8 Yandex: 35.74

Results Data

USA, NewYork#1 Quad9 1.50 ms

#2 CloudFlare 1.57 ms

#4 Norton_DNS 7.28 ms

#5 Google_DNS 7.71 ms

#6 OpenDNS 9.71 ms

#6 CleanBrowsing 10.85 ms

#7 Comodo_DNS 12.00 ms

#8 Yandex_DNS 108.14 ms

USA, San Diego#1 CloudFlare 8.57 ms

#2 Norton_DNS 9.00 ms

#3 Google_DNS 14.28 ms

#4 CleanBrowsing 19.28 ms

#5 OpenDNS 19.42 ms

#6 Quad9 19.42 ms

#7 Comodo_DNS 40.00 ms

#8 Yandex_DNS 193.57 ms

Canada, Toronto#1 CloudFlare 3.42 ms

#2 Google_DNS 9.42 ms

#3 Norton_DNS 13.00 ms

#4 CleanBrowsing 13.71 ms

#5 Quad9 15.28 ms

#6 OpenDNS 17.85 ms

#7 Comodo_DNS 21.71 ms

#8 Yandex_DNS 124.14 ms

Canada, Montreal#1 CleanBrowsing 15.28 ms

#2 Google_DNS 16.71 ms

#3 CloudFlare 17.00 ms

#4 Quad9 17.71 ms

#5 OpenDNS 23.42 ms

#6 Norton_DNS 25.71 ms

#7 Comodo_DNS 84.28 ms

#8 Yandex_DNS 118.85 ms

USA, Atlanta#1 Quad9 1.71 ms

#2 CloudFlare 1.85 ms

#3 Google_DNS 4.14 ms

#4 CleanBrowsing 15.42 ms

#5 Norton_DNS 17.00 ms

#6 OpenDNS 17.14 ms

#7 Comodo_DNS 18.57 ms

#8 Yandex_DNS 127.57 ms

USA, Dallas#1 CloudFlare 2.10 ms

#2 Norton_DNS 3.14 ms

#3 Quad9 3.42 ms

#4 OpenDNS 6.71 ms

#5 Google_DNS 7.14 ms

#6 CleanBrowsing 10.85 ms

#7 Comodo_DNS 38.42 ms

#8 Yandex_DNS 153.28 ms

USA, Fremont#1 CloudFlare 2.00 ms

#2 Norton_DNS 6.14 ms

#3 Quad9 11.00 ms

#4 CleanBrowsing 11.85 ms

#5 Google_DNS 13.71 ms

#6 Comodo_DNS 22.00 ms

#7 OpenDNS 24.42 ms

#8 Yandex_DNS 185.00 ms

USA, San Francisco#1 Norton_DNS 2.00 ms

#2 Quad9 2.14 ms

#3 CloudFlare 2.85 ms

#4 Google_DNS 12.28 ms

#5 CleanBrowsing 21.14 ms

#6 Comodo_DNS 22.14 ms

#7 OpenDNS 28.00 ms

#8 Yandex_DNS 180.42 ms

UK, London#1 CloudFlare 1.14 ms

#2 Quad9 1.85 ms

#3 CleanBrowsing 2.00 ms

#4 Norton_DNS 6.57 ms

#5 Google_DNS 7.71 ms

#6 Comodo_DNS 9.85 ms

#7 OpenDNS 9.85 ms

#8 Yandex_DNS 35.57 ms

France, Paris#1 CloudFlare 5.14 ms

#2 Comodo_DNS 10.00 ms

#3 Google_DNS 10.14 ms

#4 Quad9 12.71 ms

#5 OpenDNS 13.57 ms

#7 CleanBrowsing 14.85 ms

#6 Norton_DNS 23.85 ms

#8 Yandex_DNS 38.14 ms

NL, Amsterdam#1 CloudFlare 1.14 ms

#2 CleanBrowsing 1.14 ms

#3 Quad9 1.71 ms

#4 Google_DNS 2.71 ms

#5 OpenDNS 4.42 ms

#6 Norton_DNS 9.85 ms

#7 Comodo_DNS 12.85 ms

#8 Yandex_DNS 40.42 ms

Germany, Frankfurt#1 Norton_DNS 1.14 ms

#2 Quad9 1.14 ms

#3 CloudFlare 4.42 ms

#4 CleanBrowsing 5.00 ms

#5 Google_DNS 8.14 ms

#6 OpenDNS 8.14 ms

#7 Comodo_DNS 19.57 ms

#8 Yandex_DNS 28.85 ms

Japan, Tokyo#1 CloudFlare 2.00 ms

#2 CleanBrowsing 2.14 ms

#3 Norton_DNS 6.14 ms

#4 Google_DNS 17.28 ms

#5 Quad9 40.57 ms

#6 Comodo_DNS 124.14 ms

#7 OpenDNS 125.71 ms

#8 Yandex_DNS 283.00 ms

Singapore#1 CloudFlare 1.14 ms

#2 Google_DNS 2.00 ms

#3 Quad9 2.14 ms

#4 CleanBrowsing 2.28 ms

#5 OpenDNS 28.14 ms

#6 Norton_DNS 34.14 ms

#7 Comodo_DNS 203.71 ms

#8 Yandex_DNS 343.00 ms

India, Bang#1 CloudFlare 7.42 ms

#2 Norton_DNS 21.28 ms

#3 Quad9 38.85 ms

#4 Google_DNS 40.71 ms

#5 OpenDNS 59.42 ms

#6 CleanBrowsing 138.71 ms

#7 Comodo_DNS 150.57 ms

#8 Yandex_DNS 171.57 ms

Australia, Sydney#1 CloudFlare 22.28 ms

#2 Quad9 25.00 ms

#3 Google_DNS 26.14 ms

#4 CleanBrowsing 34.57 ms

#5 OpenDNS 37.85 ms

#6 Norton_DNS 164.57 ms

#7 Comodo_DNS 186.28 ms

#8 Yandex_DNS 352.14 ms

Australia, Brisbane#1 CloudFlare 3.00 ms

#2 CleanBrowsing 13.57 ms

#3 Quad9 17.71 ms

#4 Google_DNS 66.14 ms

#5 Norton_DNS 160.14 ms

#6 Comodo_DNS 188.28 ms

#7 OpenDNS 190.28 ms

#8 Yandex_DNS 336.71 ms

Brasil, Sao Paulo#1 CloudFlare 2.71 ms

#2 CleanBrowsing 12.00 ms

#3 Google_DNS 29.71 ms

#4 Norton_DNS 114.71 ms

#5 Quad9 114.71 ms

#6 Comodo_DNS 129.85 ms

#7 OpenDNS 213.14 ms

#8 Yandex_DNS 238.14 ms