Testei a configuração do meu DNS Virtua e descobri que ele é bem lento comparado ao do Google

In this test, Google Public DNS is

150%Faster

than your current primary DNS server

Recommended configuration (fastest + nearest)

Primary Server	8.8.8.8	Google Public DNS
Secondary Server	201.6.0.115
Tertiary Server	200.221.11.100	UOL BR

Tested DNS Servers

IP	Descr.	Hostname	Avg (ms)	Min	Max	Err	NoAns	Notes
8.8.8.8	Google Public DNS	google-public-dns-a.google.com.	77.15	11.32	1759.31	0	13	A backup DNS server for this system.  Replica of Google Public DNS-2 [8.8.4.4]
201.6.0.113	201.6.0.113	dns9.virtua.com.br.	162.43	11.28	1409.89	0	13	A backup DNS server for this system.
201.6.0.115	201.6.0.115	dns10.virtua.com.br.	192.61	10.54	1871.93	0	13	The current preferred DNS server.
200.186.100.10	T-Systems BR	ns1.t-systems.com.br.	192.66	12.55	3738.33	2	13
200.202.17.1	Matrix	dns.matrix.com.br.	217.76	11.80	2390.47	0	13
156.154.70.1	UltraDNS	rdns1.ultradns.net.	251.66	123.84	2566.10	0	2	NXDOMAIN Hijacking
200.147.255.101	UOL-2 BR-2	resolver2.uol.com.br.	262.45	10.70	2224.24	0	13
200.221.11.100	UOL BR	brahms.uol.com.br.	272.60	10.55	2557.26	0	13
216.146.36.36	DynGuide-2	resolver2.dyndnsinternetguide.com.	288.52	152.13	4484.43	0	2	NXDOMAIN Hijacking
208.67.220.220	OpenDNS	resolver2.opendns.com.	289.94	150.19	4153.60	0	0	Incorrect result for www.google.com.: google.navigation.opendns.com.  NXDOMAIN Hijacking
2001:470:20::2	Hurricane Electric IPv6	ordns.he.net.	427.79	213.29	3525.47	2	14
8.8.4.4	Google Public DNS-2	google-public-dns-b.google.com.	0.00	0.00	0.00	0		A backup DNS server for this system.  Slower replica of Google Public DNS [8.8.8.8]

Graphs

Mean Response Duration

Fastest Individual Response Duration

Response Distribution Chart (First 200ms)

Response Distribution Chart (Full)

Query Details

View the details in Comma Separated Values (csv) format.

Configuration

Name	Value
data_file	data/alexa-top-10000-global.txt
data_source	chrome
enable_censorship_checks	0
health_timeout	3.5
num_servers	11
run_count	1
select_mode	weighted
test_count	200
thread_count	45
timeout	2.0
version	1.1