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Date: Thu, 26 Aug 2004 20:45:08 -0700
From: Tim Kientzle <kientzle@freebsd.org>
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To: Jun Kuriyama <kuriyama@imgsrc.co.jp>
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cc: Current <freebsd-current@freebsd.org>
Subject: Re: bsdtar eats CPU when extracting POSIX tar archive
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Jun Kuriyama wrote:
> Tim Kientzle wrote:
> 
>>Looks like it could be network related.  I see almost
>>5,000 calls to recvfrom.  .....   Is it uid/gid lookups,
>>perhaps?  bsdtar does not (yet) do any caching of uid/gid
>>lookups...
> 
> Hmm, yes, this box uses NIS as client.  I confirmed a lot of NIS
> packets during extraction.

I just added basic uid/gid caching in libarchive's extract
routines.  This should provide a big performance boost
to bsdtar in situations like yours.

Please try the libarchive/bsdtar that's in HEAD right
now and let me know how that works for you.

Tim Kientzle