不是很理解使用代理 httping 和直接 httping 的结果

direct httping

connected to 220.181.57.216:80 (304 bytes), seq=0 time= 69.11 ms
connected to 123.125.115.110:80 (304 bytes), seq=1 time= 61.52 ms
connected to 123.125.115.110:80 (304 bytes), seq=2 time= 61.16 ms

localhost:8123(use polipo)

connected to baidu.com:80 (313 bytes), seq=0 time=  0.23 ms 
connected to baidu.com:80 (313 bytes), seq=1 time=  0.18 ms
connected to baidu.com:80 (313 bytes), seq=2 time=  0.42 ms

后者代理 ping 为什么这么低呢，难道是指从 polipo 到终端的 time 吗？