Histogram: DNS.ResolveSuccess recorded 864 samples, average = 2.8 (flags = 0x1)
0 ------------------O (125 = 14.5%)
1 ------------------------------------------------------------------------O (507 = 58.7%) {14.5%}
2 ------------------O (130 = 15.0%) {73.1%}
3 ----O (29 = 3.4%) {88.2%}
4 --O (17 = 2.0%) {91.6%}
5 -O (7 = 0.8%) {93.5%}
6 -O (4 = 0.5%) {94.3%}
7 O (3 = 0.3%) {94.8%}
8 O (3 = 0.3%) {95.1%}
9 -O (6 = 0.7%) {95.5%}
10 O (6 = 0.7%) {96.2%}
12 O (2 = 0.2%) {96.9%}
14 O (1 = 0.1%) {97.1%}
16 O (4 = 0.5%) {97.2%}
18 O (3 = 0.3%) {97.7%}
21 O (3 = 0.3%) {98.0%}
24 O (3 = 0.3%) {98.4%}
28 O (2 = 0.2%) {98.7%}
32 O (2 = 0.2%) {99.0%}
37 O (4 = 0.5%) {99.2%}
43 O (1 = 0.1%) {99.7%}
50 ...
67 O (1 = 0.1%) {99.8%}
77 ...
495 O (1 = 0.1%) {99.9%}
571 ...
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光看查询时间的测试其实不是很靠谱。。