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Re: gethostbyname_ex(hostname) extremely slow (crossposted from stackoverflow)

Date 2013-08-31 23:06 -0600
From Michael Torrie <torriem@gmail.com>
Subject Re: gethostbyname_ex(hostname) extremely slow (crossposted from stackoverflow)
References <b9f77b6f-3a65-407a-aff5-5677be2ba228@googlegroups.com> <roy-F5C43B.21010031082013@news.panix.com> <48c8f8ca-d8c1-4a60-ba7f-8e8b00993f15@googlegroups.com>
Newsgroups comp.lang.python
Message-ID <mailman.437.1378012017.19984.python-list@python.org> (permalink)

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On 08/31/2013 10:51 PM, anntzer.lee@gmail.com wrote:
> It is the call to gethostbyname_ex that is very slow.  The call to
> gethostname is quick (and returns the same string as
> /usr/bin/hostname).

What gethostbyname_ex and /usr/bin/hostname do are very different
things.  gethostbyname_ex does a DNS lookup against a server.
/usr/bin/hostname just checks a local computer setting.  I don't see why
you are comparing the two.  /usr/bin/hostname is not going to help you
find a list of IP addresses that point to a machine.

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Thread

gethostbyname_ex(hostname) extremely slow (crossposted from stackoverflow) anntzer.lee@gmail.com - 2013-08-31 17:03 -0700
  Re: gethostbyname_ex(hostname) extremely slow (crossposted from stackoverflow) Roy Smith <roy@panix.com> - 2013-08-31 21:01 -0400
    Re: gethostbyname_ex(hostname) extremely slow (crossposted from stackoverflow) anntzer.lee@gmail.com - 2013-08-31 21:51 -0700
      Re: gethostbyname_ex(hostname) extremely slow (crossposted from stackoverflow) Michael Torrie <torriem@gmail.com> - 2013-08-31 23:06 -0600
        Re: gethostbyname_ex(hostname) extremely slow (crossposted from stackoverflow) anntzer.lee@gmail.com - 2013-09-01 10:13 -0700
      Re: gethostbyname_ex(hostname) extremely slow (crossposted from stackoverflow) Roy Smith <roy@panix.com> - 2013-09-01 06:57 -0400
  Re: gethostbyname_ex(hostname) extremely slow (crossposted from stackoverflow) Chris Angelico <rosuav@gmail.com> - 2013-09-01 21:37 +1000
    Re: gethostbyname_ex(hostname) extremely slow (crossposted from stackoverflow) anntzer.lee@gmail.com - 2013-09-01 13:37 -0700
      Re: gethostbyname_ex(hostname) extremely slow (crossposted from stackoverflow) Chris Angelico <rosuav@gmail.com> - 2013-09-02 07:03 +1000
        Re: gethostbyname_ex(hostname) extremely slow (crossposted from stackoverflow) anntzer.lee@gmail.com - 2013-09-01 22:28 -0700
          Re: gethostbyname_ex(hostname) extremely slow (crossposted from stackoverflow) Chris Angelico <rosuav@gmail.com> - 2013-09-02 20:42 +1000
          Re: gethostbyname_ex(hostname) extremely slow (crossposted from stackoverflow) Roy Smith <roy@panix.com> - 2013-09-02 08:45 -0400
            Re: gethostbyname_ex(hostname) extremely slow (crossposted from stackoverflow) anntzer.lee@gmail.com - 2013-09-02 10:52 -0700
              Re: gethostbyname_ex(hostname) extremely slow (crossposted from stackoverflow) Chris Angelico <rosuav@gmail.com> - 2013-09-03 07:12 +1000

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