From: Roger Pack <rogerpack2005@...>
Date: 2010-07-01T21:32:29+09:00
Subject: Re: Networking: select() blocks for seconds (> timeout)

Brian Candler wrote:
> Raul Parolari wrote:
>> a) I do not think that there can be a DNS lookup between a 'select(x, y, 
>> z)' and a 'socket.recvfrom'.
> 
> But in Ruby, recvfrom itself (unfortunately) does a reverse DNS lookup 
> on the IP address of the peer. You really need to turn this off.

You could try recv, which I don't *think* does any DNS lookups.  Also 
setting do_not_reverse_lookup should overcome the related delay...
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