搬瓦工连接谷歌为什么需要50ms左右

本地北方联通，真连接测试220ms，感觉有点不对劲。
查了下测试用的是https://www.google.com/generate_204
换成https://www.gstatic.com/generate_204 还是220ms
换成http://www.msftconnecttest.com/connecttest.txt正常了，160ms

所以，搬瓦工连接谷歌为什么需要50ms左右？

root@95:~# ping google.comPING google.com(ya-in-f101.1e100.net (2607:f8b0:4002:c03::65)) 56 data bytes64 bytes from ya-in-x65.1e100.net (2607:f8b0:4002:c03::65): icmp_seq=1 ttl=105 time=47.7 ms64 bytes from ya-in-x65.1e100.net (2607:f8b0:4002:c03::65): icmp_seq=2 ttl=105 time=60.4 ms64 bytes from ya-in-x65.1e100.net (2607:f8b0:4002:c03::65): icmp_seq=3 ttl=105 time=47.7 ms64 bytes from ya-in-f101.1e100.net (2607:f8b0:4002:c03::65): icmp_seq=4 ttl=105 time=47.7 ms64 bytes from ya-in-x65.1e100.net (2607:f8b0:4002:c03::65): icmp_seq=5 ttl=105 time=47.9 ms64 bytes from ya-in-x65.1e100.net (2607:f8b0:4002:c03::65): icmp_seq=6 ttl=105 time=47.8 ms64 bytes from ya-in-x65.1e100.net (2607:f8b0:4002:c03::65): icmp_seq=7 ttl=105 time=55.6 ms64 bytes from ya-in-x65.1e100.net (2607:f8b0:4002:c03::65): icmp_seq=8 ttl=105 time=47.6 ms64 bytes from ya-in-x65.1e100.net (2607:f8b0:4002:c03::65): icmp_seq=9 ttl=105 time=68.9 ms