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Date: Sat, 31 Aug 2013 23:06:43 -0600
From: Michael Torrie <torriem@gmail.com>
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To: python-list@python.org
Subject: Re: gethostbyname_ex(hostname) extremely slow (crossposted from stackoverflow)
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Xref: csiph.com comp.lang.python:53398

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.