b.root-servers.net and h.root-servers.net are both in every region more or less slow. Why? I thought first that it might be an issue with the region but i can'

b.root-servers.net and h.root-servers.net are both in every region more or less slow. Why? I thought first that it might be an issue with the region but i can't find any one which showes that b and h are quick. https://www.dnsperf.com/#!dns-root-servers https://www.dnsperf.com/#!dns-root-servers