Performance Tracker project update

Antony Mawer fbsd-performance at
Wed Feb 13 20:55:51 UTC 2008

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 ... :-)


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