Hacker Newsnew | past | comments | ask | show | jobs | submitlogin

Using ping to compare the two may introduce a skew based on how the two networks prioritize ICMP.

For example, from my network google is averaging a faster response by ~.5ms

    $ ping 1.1.1.1
    PING 1.1.1.1 (1.1.1.1) 56(84) bytes of data.
    64 bytes from 1.1.1.1: icmp_seq=1 ttl=59 time=28.0 ms
    64 bytes from 1.1.1.1: icmp_seq=2 ttl=59 time=19.2 ms
    64 bytes from 1.1.1.1: icmp_seq=3 ttl=59 time=19.1 ms
    64 bytes from 1.1.1.1: icmp_seq=4 ttl=59 time=19.0 ms
    64 bytes from 1.1.1.1: icmp_seq=5 ttl=59 time=20.5 ms
    64 bytes from 1.1.1.1: icmp_seq=6 ttl=59 time=19.6 ms
    ^C
    --- 1.1.1.1 ping statistics ---
    6 packets transmitted, 6 received, 0% packet loss, time     5010ms
    rtt min/avg/max/mdev = 19.043/20.950/28.072/3.226 ms
    
    $ ping 8.8.8.8
    PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
    64 bytes from 8.8.8.8: icmp_seq=1 ttl=54 time=19.1 ms
    64 bytes from 8.8.8.8: icmp_seq=2 ttl=54 time=20.1 ms
    64 bytes from 8.8.8.8: icmp_seq=3 ttl=54 time=20.6 ms
    64 bytes from 8.8.8.8: icmp_seq=4 ttl=54 time=21.1 ms
    64 bytes from 8.8.8.8: icmp_seq=5 ttl=54 time=21.9 ms
    64 bytes from 8.8.8.8: icmp_seq=6 ttl=54 time=19.4 ms
    ^C
    --- 8.8.8.8 ping statistics ---
    6 packets transmitted, 6 received, 0% packet loss, time 5008ms
    rtt min/avg/max/mdev = 19.114/20.414/21.922/0.988 ms
However, if i do DNS lookups against a few major domains, google is actually slower by ~2ms

    $ for domain in microsoft.com google.com cloudflare.com facebook.com twitter.com; \
      do cloudflare=$(dig @1.1.1.1 ${domain} | awk '/msec/{print $4}'); \
        google=$(dig @8.8.8.8 ${domain} | awk '/msec/{print $4}');\
        printf "${domain}:\tcloudflare ${cloudflare}ms\tgoogle ${google}ms\n";\
      done
    microsoft.com:	cloudflare 22ms	google 23ms
    google.com:		cloudflare 19ms	google 22ms
    cloudflare.com:	cloudflare 19ms	google 23ms
    facebook.com:	cloudflare 21ms	google 20ms
    twitter.com:	cloudflare 19ms	google 21ms
You'd have to run a bunch of queries to see if there is an actual impact vs. just an outlier (e.g. the first ping response from cloudflare), just wanted to point it out.


Guidelines | FAQ | Lists | API | Security | Legal | Apply to YC | Contact

Search: