Date: Thu, 14 Feb 2008 07:44:50 +1100 From: Antony Mawer <fbsd-performance@mawer.org> To: Erik Cederstrand <erik@cederstrand.dk> Cc: freebsd-performance@freebsd.org, Brooks Davis <brooks@freebsd.org>, kris@freebsd.org Subject: Re: Performance Tracker project update Message-ID: <47B356C2.50200@mawer.org> In-Reply-To: <47B302B2.30607@cederstrand.dk> References: <4796C717.9000507@cederstrand.dk> <20080123193400.N63024@fledge.watson.org> <4797A245.7080202@cederstrand.dk> <20080123202433.E63024@fledge.watson.org> <4797A802.8060509@FreeBSD.org> <47A0BFE7.4070708@cederstrand.dk> <20080130190000.GA18333@lor.one-eyed-alien.net> <47AC15A5.5020009@cederstrand.dk> <20080208151756.GA35423@lor.one-eyed-alien.net> <47B302B2.30607@cederstrand.dk>
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Erik Cederstrand wrote: > Brooks Davis skrev: >> On Fri, Feb 08, 2008 at 09:41:09AM +0100, Erik Cederstrand wrote: >>> I finally got around to testing this, and with a combination of mtree >>> comparing md5 hashes, bsdiff compacting changed files and hardlinking >>> unchanged files I get a reduction in size from 256MB to 10MB. Pretty >>> good, and the whole operation only takes a few minutes. >> >> Cool! >> >>> I have one peculiarity, though. I install python2.5 into the >>> directory containing the build, and even though the python version >>> has not changed, I still get mismatching md5 sums on every .pyo and >>> .pyc file. Any thoughts on this? ... > > As suggested in other posts, deleting .pyo and .pyc files gets me down > to 6MB. Static libraries (.a files) in /usr/lib and /usr/local/lib still > have mismatching MD5 sums even though no source code change warrants > this. Can I do anything about that? Are static libraries even needed > anymore? You may want to look at freebsd-update: I believe it has some smarts to NULL out certain date/time information in files before doing a comparison, so that embedded timestamps don't cause two otherwise identical files to show as different... At least that is what I recall ... :-) --Antony
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