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From: Max Laier <max@love2party.net>
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Date: Wed, 9 Jun 2010 23:30:30 +0200
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Cc: Nick Rogers <ncrogers@gmail.com>
Subject: Re: arp(8) performance w/ many aliases assigned to an interface
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On Wednesday 09 June 2010 23:21:05 Max Laier wrote:
> Hello Nick,
> 
> On Wednesday 09 June 2010 20:17:43 Nick Rogers wrote:
> > Is there something that can be done to speedup the call to
> > if_indextoname(), or would it be worthwhile for me to submit a patch that
> > adds the ability to skip the interface lookup as an arp(8) option?
> 
> how about the attached:
> 
> # time arp -an > /dev/null
> 0.171u 0.462s 0:00.63 100.0%    21+1538k 0+0io 0pf+0w
> # time arp.patched -an > /dev/null
> 0.005u 0.000s 0:00.00 0.0%      0+0k 0+0io 0pf+0w
> 
> # arp -an | wc -l
>     1095
> 
> I'll commit this soon unless somebody objects.

... make that s/long/int64_t/ ... I keep forgetting that long is 32bit 
sometimes.