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Date:      Sat, 16 Sep 2006 10:14:21 -0700
From:      Tim Kientzle <kientzle@freebsd.org>
To:        Kris Kennaway <kris@obsecurity.org>
Cc:        Ruslan Ermilov <ru@freebsd.org>, src-committers@freebsd.org, Andre Oppermann <andre@freebsd.org>, cvs-all@freebsd.org, cvs-src@freebsd.org
Subject:   Re: cvs commit: src/contrib/tar ABOUT-NLS AUTHORS COPYING ChangeLog ChangeLog.1 FREEBSD-Xlist FREEBSD-upgrade INSTALL NEWS PORTS README README-alpha THANKS TODO src/contrib/tar/doc fdl.texi freemanuals.texi getdate.texi header.texi tar.texi version.texi ...
Message-ID:  <450C30ED.7090901@freebsd.org>
In-Reply-To: <20060915180315.GB74735@xor.obsecurity.org>
References:  <200609150804.k8F84O1H056038@repoman.freebsd.org> <20060915155912.GA71796@xor.obsecurity.org> <450AD508.10608@freebsd.org> <20060915180315.GB74735@xor.obsecurity.org>

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>>>> Remove vestiges of GNU tar.
>>>
>>>:(
>>>
>>>gtar is still much faster than bsdtar...oh well.
>>
>>What makes gtar so much faster than bsdtar?
> 
> I don't know, tkientzle told me once he'd try to look at it, but I
> don't think anything came of it.

bsdtar doesn't overlap I/O and (de)compression.
In some cases, this makes gtar faster.
I still intend to experiment with async I/O and/or
mmap to see if that addresses the difference.

Tim



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