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Date: Mon, 28 May 2007 11:26:44 -0500
From: Stephen Montgomery-Smith <stephen@math.missouri.edu>
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To: Ivan Voras <ivoras@fer.hr>
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Cc: freebsd-hackers@freebsd.org
Subject: Re: Looking for speed increases in "make index" and pkg_version for
 ports
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Ivan Voras wrote:
> Stephen Montgomery-Smith wrote:
>> I have been thinking a lot about looking for speed increases for "make
>> index" and pkg_version and things like that.  So for example, in
>> pkg_version, it calls "make -V PKGNAME" for every installed package. Now
>> "make -V PKGNAME" should be a speedy operation, but the make has to load
>> in and analyze bsd.port.mk, a quite complicated file with about 200,000
>> characters in it, when all it is needing to do is to figure out the
>> value of the variable PKGNAME.
> 
> As long as far-out ideas are being discussed, how about caching such
> information (including dependenices) in a file (I'd call it a database
> but then I'd had to start a holy war :) ) so it's calculated only once,
> preferably on the portsnap / cvsup servers and not at the end-user?

Because the information is not a constant.  For example, the mpg123 port 
changes its PKGNAME as soon as esound is installed.